/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-04 21:41:04,081 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-04 21:41:04,083 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-04 21:41:04,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-04 21:41:04,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-04 21:41:04,114 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-04 21:41:04,115 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-04 21:41:04,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-04 21:41:04,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-04 21:41:04,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-04 21:41:04,119 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-04 21:41:04,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-04 21:41:04,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-04 21:41:04,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-04 21:41:04,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-04 21:41:04,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-04 21:41:04,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-04 21:41:04,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-04 21:41:04,139 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-04 21:41:04,140 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-04 21:41:04,144 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-04 21:41:04,179 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-04 21:41:04,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-04 21:41:04,179 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-04 21:41:04,180 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-04 21:41:04,182 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-04 21:41:04,182 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-04 21:41:04,182 INFO L138 SettingsManager]: * Use SBE=true [2021-06-04 21:41:04,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-04 21:41:04,182 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-04 21:41:04,183 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-04 21:41:04,183 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-04 21:41:04,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-04 21:41:04,184 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-04 21:41:04,184 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-04 21:41:04,184 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-04 21:41:04,184 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-04 21:41:04,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-04 21:41:04,184 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-04 21:41:04,185 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-04 21:41:04,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-04 21:41:04,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-04 21:41:04,185 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-04 21:41:04,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-04 21:41:04,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-04 21:41:04,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-04 21:41:04,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-04 21:41:04,186 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-04 21:41:04,186 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-04 21:41:04,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-04 21:41:04,186 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-04 21:41:04,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-04 21:41:04,186 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-04 21:41:04,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-04 21:41:04,556 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-04 21:41:04,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-04 21:41:04,560 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-04 21:41:04,565 INFO L275 PluginConnector]: CDTParser initialized [2021-06-04 21:41:04,565 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2021-06-04 21:41:04,620 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82b3774c1/3c565fa613b9428ba82746ac1ee308d7/FLAGbb7f1ce67 [2021-06-04 21:41:05,119 INFO L306 CDTParser]: Found 1 translation units. [2021-06-04 21:41:05,120 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2021-06-04 21:41:05,138 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82b3774c1/3c565fa613b9428ba82746ac1ee308d7/FLAGbb7f1ce67 [2021-06-04 21:41:05,642 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82b3774c1/3c565fa613b9428ba82746ac1ee308d7 [2021-06-04 21:41:05,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-04 21:41:05,644 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-04 21:41:05,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-04 21:41:05,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-04 21:41:05,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-04 21:41:05,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 09:41:05" (1/1) ... [2021-06-04 21:41:05,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6eb9eced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:41:05, skipping insertion in model container [2021-06-04 21:41:05,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 09:41:05" (1/1) ... [2021-06-04 21:41:05,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-04 21:41:05,708 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-04 21:41:06,021 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i[30962,30975] [2021-06-04 21:41:06,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-04 21:41:06,032 INFO L203 MainTranslator]: Completed pre-run [2021-06-04 21:41:06,059 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i[30962,30975] [2021-06-04 21:41:06,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-04 21:41:06,122 INFO L208 MainTranslator]: Completed translation [2021-06-04 21:41:06,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:41:06 WrapperNode [2021-06-04 21:41:06,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-04 21:41:06,123 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-04 21:41:06,123 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-04 21:41:06,123 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-04 21:41:06,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:41:06" (1/1) ... [2021-06-04 21:41:06,160 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:41:06" (1/1) ... [2021-06-04 21:41:06,179 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-04 21:41:06,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-04 21:41:06,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-04 21:41:06,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-04 21:41:06,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:41:06" (1/1) ... [2021-06-04 21:41:06,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:41:06" (1/1) ... [2021-06-04 21:41:06,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:41:06" (1/1) ... [2021-06-04 21:41:06,191 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:41:06" (1/1) ... [2021-06-04 21:41:06,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:41:06" (1/1) ... [2021-06-04 21:41:06,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:41:06" (1/1) ... [2021-06-04 21:41:06,210 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:41:06" (1/1) ... [2021-06-04 21:41:06,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-04 21:41:06,212 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-04 21:41:06,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-04 21:41:06,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-04 21:41:06,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:41:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-04 21:41:06,283 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-04 21:41:06,284 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-04 21:41:06,284 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-04 21:41:06,284 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-04 21:41:06,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-04 21:41:06,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-04 21:41:06,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-04 21:41:06,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-04 21:41:06,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-04 21:41:06,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-04 21:41:06,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-04 21:41:06,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-04 21:41:06,288 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-04 21:41:06,666 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-04 21:41:06,667 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-04 21:41:06,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 09:41:06 BoogieIcfgContainer [2021-06-04 21:41:06,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-04 21:41:06,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-04 21:41:06,670 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-04 21:41:06,672 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-04 21:41:06,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 09:41:05" (1/3) ... [2021-06-04 21:41:06,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d817aef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 09:41:06, skipping insertion in model container [2021-06-04 21:41:06,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:41:06" (2/3) ... [2021-06-04 21:41:06,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d817aef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 09:41:06, skipping insertion in model container [2021-06-04 21:41:06,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 09:41:06" (3/3) ... [2021-06-04 21:41:06,675 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2021-06-04 21:41:06,680 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-04 21:41:06,680 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-04 21:41:06,680 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-04 21:41:06,681 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-04 21:41:06,707 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,707 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,708 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,708 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,708 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,708 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,708 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,708 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,709 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,709 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,709 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,710 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,710 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,710 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,710 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,710 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,711 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,711 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,711 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,711 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,711 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,711 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,712 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,712 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,713 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,713 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,713 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,713 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,713 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,713 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,714 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,714 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,714 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,715 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,715 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,715 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,715 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,715 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,715 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,715 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,716 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,716 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,716 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,716 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,716 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,716 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,717 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,717 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,717 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,717 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,717 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,718 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,718 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,718 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,720 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,720 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,721 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,722 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,722 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,722 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,722 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,723 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,730 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,730 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,730 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,730 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,730 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,731 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:06,732 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-04 21:41:06,750 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-04 21:41:06,773 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-04 21:41:06,773 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-04 21:41:06,773 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-04 21:41:06,773 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-04 21:41:06,773 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-04 21:41:06,773 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-04 21:41:06,773 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-04 21:41:06,774 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-04 21:41:06,784 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-06-04 21:41:06,874 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:06,880 INFO L276 IsEmpty]: Start isEmpty. Operand has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:06,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-04 21:41:06,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:06,894 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:06,894 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:06,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:06,899 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-06-04 21:41:06,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:06,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200504513] [2021-06-04 21:41:06,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:07,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:07,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:07,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200504513] [2021-06-04 21:41:07,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200504513] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:41:07,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:41:07,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-04 21:41:07,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334488134] [2021-06-04 21:41:07,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-04 21:41:07,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:07,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-04 21:41:07,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-04 21:41:07,226 INFO L87 Difference]: Start difference. First operand has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:07,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:07,352 INFO L93 Difference]: Finished difference Result 3294 states and 9568 transitions. [2021-06-04 21:41:07,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-04 21:41:07,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-04 21:41:07,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:07,382 INFO L225 Difference]: With dead ends: 3294 [2021-06-04 21:41:07,383 INFO L226 Difference]: Without dead ends: 1248 [2021-06-04 21:41:07,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-04 21:41:07,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-04 21:41:07,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 800. [2021-06-04 21:41:07,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.728410513141427) internal successors, (2180), 799 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:07,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-06-04 21:41:07,481 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 32 [2021-06-04 21:41:07,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:07,482 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-06-04 21:41:07,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:07,482 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-06-04 21:41:07,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-04 21:41:07,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:07,485 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:07,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-04 21:41:07,485 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:07,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:07,486 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-06-04 21:41:07,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:07,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355410014] [2021-06-04 21:41:07,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:07,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:07,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:07,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355410014] [2021-06-04 21:41:07,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355410014] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:41:07,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:41:07,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-04 21:41:07,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336252752] [2021-06-04 21:41:07,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-04 21:41:07,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:07,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-04 21:41:07,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-04 21:41:07,648 INFO L87 Difference]: Start difference. First operand 800 states and 2180 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:07,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:07,767 INFO L93 Difference]: Finished difference Result 1302 states and 3436 transitions. [2021-06-04 21:41:07,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-04 21:41:07,767 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-04 21:41:07,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:07,774 INFO L225 Difference]: With dead ends: 1302 [2021-06-04 21:41:07,774 INFO L226 Difference]: Without dead ends: 920 [2021-06-04 21:41:07,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-04 21:41:07,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-04 21:41:07,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-06-04 21:41:07,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.6882966396292005) internal successors, (2320), 863 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:07,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-06-04 21:41:07,810 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-06-04 21:41:07,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:07,811 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-06-04 21:41:07,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:07,811 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-06-04 21:41:07,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-04 21:41:07,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:07,816 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:07,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-04 21:41:07,816 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:07,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:07,823 INFO L82 PathProgramCache]: Analyzing trace with hash 307394794, now seen corresponding path program 1 times [2021-06-04 21:41:07,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:07,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507348970] [2021-06-04 21:41:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:07,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:07,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:07,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:07,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507348970] [2021-06-04 21:41:07,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507348970] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:41:07,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:41:07,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-04 21:41:07,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631928196] [2021-06-04 21:41:07,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-04 21:41:07,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:07,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-04 21:41:07,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-04 21:41:07,913 INFO L87 Difference]: Start difference. First operand 864 states and 2320 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:08,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:08,104 INFO L93 Difference]: Finished difference Result 1304 states and 3456 transitions. [2021-06-04 21:41:08,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-04 21:41:08,105 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-04 21:41:08,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:08,110 INFO L225 Difference]: With dead ends: 1304 [2021-06-04 21:41:08,110 INFO L226 Difference]: Without dead ends: 1044 [2021-06-04 21:41:08,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:41:08,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-06-04 21:41:08,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 876. [2021-06-04 21:41:08,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.7062857142857144) internal successors, (2368), 875 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:08,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-06-04 21:41:08,133 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-06-04 21:41:08,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:08,134 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-06-04 21:41:08,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:08,134 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-06-04 21:41:08,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-04 21:41:08,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:08,137 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:08,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-04 21:41:08,137 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:08,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:08,138 INFO L82 PathProgramCache]: Analyzing trace with hash -258094508, now seen corresponding path program 2 times [2021-06-04 21:41:08,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:08,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176327253] [2021-06-04 21:41:08,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:08,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:08,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176327253] [2021-06-04 21:41:08,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176327253] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:41:08,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:41:08,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-04 21:41:08,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685297613] [2021-06-04 21:41:08,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-04 21:41:08,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:08,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-04 21:41:08,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-04 21:41:08,287 INFO L87 Difference]: Start difference. First operand 876 states and 2368 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:08,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:08,404 INFO L93 Difference]: Finished difference Result 1772 states and 4744 transitions. [2021-06-04 21:41:08,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-04 21:41:08,405 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-04 21:41:08,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:08,412 INFO L225 Difference]: With dead ends: 1772 [2021-06-04 21:41:08,412 INFO L226 Difference]: Without dead ends: 1505 [2021-06-04 21:41:08,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-04 21:41:08,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-06-04 21:41:08,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 975. [2021-06-04 21:41:08,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 2.6981519507186857) internal successors, (2628), 974 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:08,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2628 transitions. [2021-06-04 21:41:08,441 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2628 transitions. Word has length 40 [2021-06-04 21:41:08,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:08,441 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 2628 transitions. [2021-06-04 21:41:08,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:08,441 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2628 transitions. [2021-06-04 21:41:08,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-04 21:41:08,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:08,443 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:08,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-04 21:41:08,443 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:08,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:08,443 INFO L82 PathProgramCache]: Analyzing trace with hash 129784312, now seen corresponding path program 3 times [2021-06-04 21:41:08,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:08,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772642783] [2021-06-04 21:41:08,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:08,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:08,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:08,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772642783] [2021-06-04 21:41:08,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772642783] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:41:08,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:41:08,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-04 21:41:08,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723998179] [2021-06-04 21:41:08,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-04 21:41:08,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:08,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-04 21:41:08,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-04 21:41:08,514 INFO L87 Difference]: Start difference. First operand 975 states and 2628 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:08,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:08,610 INFO L93 Difference]: Finished difference Result 2211 states and 5878 transitions. [2021-06-04 21:41:08,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-04 21:41:08,610 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-04 21:41:08,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:08,618 INFO L225 Difference]: With dead ends: 2211 [2021-06-04 21:41:08,618 INFO L226 Difference]: Without dead ends: 1944 [2021-06-04 21:41:08,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:41:08,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-06-04 21:41:08,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1127. [2021-06-04 21:41:08,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 2.769982238010657) internal successors, (3119), 1126 states have internal predecessors, (3119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:08,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3119 transitions. [2021-06-04 21:41:08,661 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3119 transitions. Word has length 40 [2021-06-04 21:41:08,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:08,662 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3119 transitions. [2021-06-04 21:41:08,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:08,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3119 transitions. [2021-06-04 21:41:08,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-04 21:41:08,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:08,663 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:08,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-04 21:41:08,663 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:08,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:08,664 INFO L82 PathProgramCache]: Analyzing trace with hash 152127562, now seen corresponding path program 4 times [2021-06-04 21:41:08,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:08,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791670430] [2021-06-04 21:41:08,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:08,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:08,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:08,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791670430] [2021-06-04 21:41:08,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791670430] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:41:08,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:41:08,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-04 21:41:08,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612903000] [2021-06-04 21:41:08,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-04 21:41:08,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:08,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-04 21:41:08,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-04 21:41:08,766 INFO L87 Difference]: Start difference. First operand 1127 states and 3119 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:08,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:08,920 INFO L93 Difference]: Finished difference Result 1671 states and 4527 transitions. [2021-06-04 21:41:08,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-04 21:41:08,921 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-04 21:41:08,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:08,926 INFO L225 Difference]: With dead ends: 1671 [2021-06-04 21:41:08,926 INFO L226 Difference]: Without dead ends: 1173 [2021-06-04 21:41:08,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:41:08,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-06-04 21:41:08,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 922. [2021-06-04 21:41:08,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 2.732899022801303) internal successors, (2517), 921 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:08,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 2517 transitions. [2021-06-04 21:41:08,947 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 2517 transitions. Word has length 40 [2021-06-04 21:41:08,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:08,948 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 2517 transitions. [2021-06-04 21:41:08,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:08,948 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 2517 transitions. [2021-06-04 21:41:08,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-04 21:41:08,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:08,949 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:08,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-04 21:41:08,950 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:08,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:08,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1301576209, now seen corresponding path program 1 times [2021-06-04 21:41:08,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:08,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948867613] [2021-06-04 21:41:08,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:08,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:09,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:09,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:09,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948867613] [2021-06-04 21:41:09,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948867613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:09,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106632428] [2021-06-04 21:41:09,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:09,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-04 21:41:09,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:09,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106632428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:09,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:09,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-04 21:41:09,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359619860] [2021-06-04 21:41:09,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-04 21:41:09,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:09,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-04 21:41:09,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-04 21:41:09,447 INFO L87 Difference]: Start difference. First operand 922 states and 2517 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:09,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:09,601 INFO L93 Difference]: Finished difference Result 1526 states and 4027 transitions. [2021-06-04 21:41:09,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-04 21:41:09,602 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-04 21:41:09,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:09,608 INFO L225 Difference]: With dead ends: 1526 [2021-06-04 21:41:09,608 INFO L226 Difference]: Without dead ends: 1256 [2021-06-04 21:41:09,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:09,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-06-04 21:41:09,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1113. [2021-06-04 21:41:09,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1112 states have (on average 2.741007194244604) internal successors, (3048), 1112 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:09,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 3048 transitions. [2021-06-04 21:41:09,639 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 3048 transitions. Word has length 45 [2021-06-04 21:41:09,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:09,640 INFO L482 AbstractCegarLoop]: Abstraction has 1113 states and 3048 transitions. [2021-06-04 21:41:09,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:09,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 3048 transitions. [2021-06-04 21:41:09,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-04 21:41:09,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:09,642 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:09,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-04 21:41:09,865 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:09,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:09,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1689455029, now seen corresponding path program 2 times [2021-06-04 21:41:09,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:09,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199008909] [2021-06-04 21:41:09,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:09,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:09,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199008909] [2021-06-04 21:41:09,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199008909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:09,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188068381] [2021-06-04 21:41:09,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:10,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:41:10,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:10,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-04 21:41:10,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:10,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:10,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188068381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:10,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:10,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-04 21:41:10,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170904302] [2021-06-04 21:41:10,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-04 21:41:10,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:10,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-04 21:41:10,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-04 21:41:10,173 INFO L87 Difference]: Start difference. First operand 1113 states and 3048 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:10,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:10,311 INFO L93 Difference]: Finished difference Result 2408 states and 6431 transitions. [2021-06-04 21:41:10,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-04 21:41:10,312 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-04 21:41:10,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:10,320 INFO L225 Difference]: With dead ends: 2408 [2021-06-04 21:41:10,320 INFO L226 Difference]: Without dead ends: 2138 [2021-06-04 21:41:10,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:10,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-06-04 21:41:10,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1293. [2021-06-04 21:41:10,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 2.791795665634675) internal successors, (3607), 1292 states have internal predecessors, (3607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:10,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 3607 transitions. [2021-06-04 21:41:10,361 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 3607 transitions. Word has length 45 [2021-06-04 21:41:10,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:10,361 INFO L482 AbstractCegarLoop]: Abstraction has 1293 states and 3607 transitions. [2021-06-04 21:41:10,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:10,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 3607 transitions. [2021-06-04 21:41:10,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-04 21:41:10,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:10,363 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:10,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:10,577 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:10,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:10,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1711798279, now seen corresponding path program 3 times [2021-06-04 21:41:10,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:10,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49805591] [2021-06-04 21:41:10,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:10,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:10,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:10,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49805591] [2021-06-04 21:41:10,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49805591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:10,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403113973] [2021-06-04 21:41:10,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:10,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-04 21:41:10,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:10,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-04 21:41:10,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:10,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:10,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403113973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:10,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:10,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-04 21:41:10,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103331708] [2021-06-04 21:41:10,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-04 21:41:10,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:10,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-04 21:41:10,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-04 21:41:10,844 INFO L87 Difference]: Start difference. First operand 1293 states and 3607 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:11,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:11,093 INFO L93 Difference]: Finished difference Result 2196 states and 5861 transitions. [2021-06-04 21:41:11,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-04 21:41:11,094 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-04 21:41:11,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:11,100 INFO L225 Difference]: With dead ends: 2196 [2021-06-04 21:41:11,101 INFO L226 Difference]: Without dead ends: 1621 [2021-06-04 21:41:11,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 208.9ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:41:11,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-06-04 21:41:11,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1328. [2021-06-04 21:41:11,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 2.7754333082140166) internal successors, (3683), 1327 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:11,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 3683 transitions. [2021-06-04 21:41:11,131 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 3683 transitions. Word has length 45 [2021-06-04 21:41:11,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:11,131 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 3683 transitions. [2021-06-04 21:41:11,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:11,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 3683 transitions. [2021-06-04 21:41:11,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-04 21:41:11,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:11,133 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:11,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:11,356 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:11,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:11,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1229914011, now seen corresponding path program 1 times [2021-06-04 21:41:11,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:11,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594975324] [2021-06-04 21:41:11,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:11,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:11,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:11,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594975324] [2021-06-04 21:41:11,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594975324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:11,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733735278] [2021-06-04 21:41:11,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:11,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:41:11,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:11,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:11,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733735278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:11,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:11,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-04 21:41:11,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964766065] [2021-06-04 21:41:11,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-04 21:41:11,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:11,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-04 21:41:11,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:41:11,637 INFO L87 Difference]: Start difference. First operand 1328 states and 3683 transitions. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:11,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:11,804 INFO L93 Difference]: Finished difference Result 2068 states and 5483 transitions. [2021-06-04 21:41:11,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-04 21:41:11,805 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-04 21:41:11,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:11,812 INFO L225 Difference]: With dead ends: 2068 [2021-06-04 21:41:11,812 INFO L226 Difference]: Without dead ends: 1734 [2021-06-04 21:41:11,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 154.1ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:41:11,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-06-04 21:41:11,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1413. [2021-06-04 21:41:11,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 2.7287535410764874) internal successors, (3853), 1412 states have internal predecessors, (3853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:11,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 3853 transitions. [2021-06-04 21:41:11,844 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 3853 transitions. Word has length 50 [2021-06-04 21:41:11,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:11,845 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 3853 transitions. [2021-06-04 21:41:11,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:11,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 3853 transitions. [2021-06-04 21:41:11,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-04 21:41:11,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:11,847 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:12,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:12,061 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:12,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:12,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1568318167, now seen corresponding path program 2 times [2021-06-04 21:41:12,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:12,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48166234] [2021-06-04 21:41:12,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:12,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:12,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:12,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:12,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48166234] [2021-06-04 21:41:12,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48166234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:12,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183753746] [2021-06-04 21:41:12,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:12,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:41:12,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:12,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-04 21:41:12,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:12,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:12,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183753746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:12,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:12,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-04 21:41:12,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388573264] [2021-06-04 21:41:12,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-04 21:41:12,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:12,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-04 21:41:12,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-04 21:41:12,342 INFO L87 Difference]: Start difference. First operand 1413 states and 3853 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:12,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:12,465 INFO L93 Difference]: Finished difference Result 2061 states and 5277 transitions. [2021-06-04 21:41:12,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-04 21:41:12,466 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-04 21:41:12,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:12,488 INFO L225 Difference]: With dead ends: 2061 [2021-06-04 21:41:12,488 INFO L226 Difference]: Without dead ends: 1791 [2021-06-04 21:41:12,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 102.3ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:41:12,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2021-06-04 21:41:12,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1428. [2021-06-04 21:41:12,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.721093202522775) internal successors, (3883), 1427 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:12,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3883 transitions. [2021-06-04 21:41:12,523 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3883 transitions. Word has length 50 [2021-06-04 21:41:12,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:12,524 INFO L482 AbstractCegarLoop]: Abstraction has 1428 states and 3883 transitions. [2021-06-04 21:41:12,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:12,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3883 transitions. [2021-06-04 21:41:12,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-04 21:41:12,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:12,526 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:12,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-04 21:41:12,749 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:12,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:12,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1011406841, now seen corresponding path program 3 times [2021-06-04 21:41:12,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:12,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436070926] [2021-06-04 21:41:12,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:12,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:12,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436070926] [2021-06-04 21:41:12,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436070926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:12,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653689366] [2021-06-04 21:41:12,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:12,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-04 21:41:12,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:12,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-04 21:41:12,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:13,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653689366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:13,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:13,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-04 21:41:13,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804217250] [2021-06-04 21:41:13,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-04 21:41:13,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:13,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-04 21:41:13,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-04 21:41:13,024 INFO L87 Difference]: Start difference. First operand 1428 states and 3883 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:13,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:13,224 INFO L93 Difference]: Finished difference Result 2006 states and 5197 transitions. [2021-06-04 21:41:13,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-04 21:41:13,224 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-04 21:41:13,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:13,228 INFO L225 Difference]: With dead ends: 2006 [2021-06-04 21:41:13,228 INFO L226 Difference]: Without dead ends: 1736 [2021-06-04 21:41:13,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 160.0ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-06-04 21:41:13,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-06-04 21:41:13,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1428. [2021-06-04 21:41:13,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.7245970567624385) internal successors, (3888), 1427 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:13,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3888 transitions. [2021-06-04 21:41:13,255 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3888 transitions. Word has length 50 [2021-06-04 21:41:13,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:13,255 INFO L482 AbstractCegarLoop]: Abstraction has 1428 states and 3888 transitions. [2021-06-04 21:41:13,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:13,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3888 transitions. [2021-06-04 21:41:13,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-04 21:41:13,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:13,257 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:13,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:13,476 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:13,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:13,477 INFO L82 PathProgramCache]: Analyzing trace with hash -21240761, now seen corresponding path program 4 times [2021-06-04 21:41:13,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:13,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247396380] [2021-06-04 21:41:13,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:13,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:13,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:13,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247396380] [2021-06-04 21:41:13,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247396380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:13,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242623174] [2021-06-04 21:41:13,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:13,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:41:13,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:13,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-04 21:41:13,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:13,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:13,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242623174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:13,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:13,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-04 21:41:13,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175875281] [2021-06-04 21:41:13,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-04 21:41:13,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:13,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-04 21:41:13,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-04 21:41:13,696 INFO L87 Difference]: Start difference. First operand 1428 states and 3888 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:13,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:13,862 INFO L93 Difference]: Finished difference Result 2798 states and 7421 transitions. [2021-06-04 21:41:13,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-04 21:41:13,862 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-04 21:41:13,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:13,867 INFO L225 Difference]: With dead ends: 2798 [2021-06-04 21:41:13,868 INFO L226 Difference]: Without dead ends: 2528 [2021-06-04 21:41:13,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 118.2ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:41:13,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2021-06-04 21:41:13,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 1608. [2021-06-04 21:41:13,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 2.7672682016179215) internal successors, (4447), 1607 states have internal predecessors, (4447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:13,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 4447 transitions. [2021-06-04 21:41:13,943 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 4447 transitions. Word has length 50 [2021-06-04 21:41:13,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:13,944 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 4447 transitions. [2021-06-04 21:41:13,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:13,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 4447 transitions. [2021-06-04 21:41:13,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-04 21:41:13,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:13,946 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:14,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:14,169 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:14,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:14,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1102489, now seen corresponding path program 5 times [2021-06-04 21:41:14,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:14,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674036062] [2021-06-04 21:41:14,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:14,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:14,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674036062] [2021-06-04 21:41:14,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674036062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:14,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829530938] [2021-06-04 21:41:14,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:14,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-04 21:41:14,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:14,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-04 21:41:14,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:14,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:14,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829530938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:14,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:14,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-04 21:41:14,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107747949] [2021-06-04 21:41:14,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-04 21:41:14,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:14,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-04 21:41:14,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-04 21:41:14,402 INFO L87 Difference]: Start difference. First operand 1608 states and 4447 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:14,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:14,633 INFO L93 Difference]: Finished difference Result 2285 states and 6121 transitions. [2021-06-04 21:41:14,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-04 21:41:14,640 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-04 21:41:14,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:14,643 INFO L225 Difference]: With dead ends: 2285 [2021-06-04 21:41:14,643 INFO L226 Difference]: Without dead ends: 1706 [2021-06-04 21:41:14,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 193.8ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:41:14,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2021-06-04 21:41:14,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1313. [2021-06-04 21:41:14,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1312 states have (on average 2.7271341463414633) internal successors, (3578), 1312 states have internal predecessors, (3578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:14,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 3578 transitions. [2021-06-04 21:41:14,670 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 3578 transitions. Word has length 50 [2021-06-04 21:41:14,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:14,670 INFO L482 AbstractCegarLoop]: Abstraction has 1313 states and 3578 transitions. [2021-06-04 21:41:14,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:14,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 3578 transitions. [2021-06-04 21:41:14,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-04 21:41:14,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:14,672 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:14,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-04 21:41:14,893 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:14,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:14,893 INFO L82 PathProgramCache]: Analyzing trace with hash 117785766, now seen corresponding path program 6 times [2021-06-04 21:41:14,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:14,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924451877] [2021-06-04 21:41:14,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:14,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:14,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:14,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924451877] [2021-06-04 21:41:14,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924451877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:14,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730193082] [2021-06-04 21:41:14,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:15,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-04 21:41:15,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:15,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:41:15,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:15,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:15,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730193082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:15,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:15,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-04 21:41:15,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238710643] [2021-06-04 21:41:15,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-04 21:41:15,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:15,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-04 21:41:15,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-04 21:41:15,146 INFO L87 Difference]: Start difference. First operand 1313 states and 3578 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:15,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:15,317 INFO L93 Difference]: Finished difference Result 1931 states and 5017 transitions. [2021-06-04 21:41:15,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-04 21:41:15,317 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-04 21:41:15,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:15,320 INFO L225 Difference]: With dead ends: 1931 [2021-06-04 21:41:15,320 INFO L226 Difference]: Without dead ends: 1661 [2021-06-04 21:41:15,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:41:15,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-06-04 21:41:15,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1388. [2021-06-04 21:41:15,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 2.741888968997837) internal successors, (3803), 1387 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:15,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 3803 transitions. [2021-06-04 21:41:15,348 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 3803 transitions. Word has length 55 [2021-06-04 21:41:15,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:15,348 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 3803 transitions. [2021-06-04 21:41:15,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:15,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 3803 transitions. [2021-06-04 21:41:15,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-04 21:41:15,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:15,350 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:15,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-04 21:41:15,565 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:15,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:15,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1597456522, now seen corresponding path program 7 times [2021-06-04 21:41:15,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:15,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119494827] [2021-06-04 21:41:15,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:15,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:15,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:15,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119494827] [2021-06-04 21:41:15,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119494827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:15,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748000929] [2021-06-04 21:41:15,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:15,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:41:15,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:15,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748000929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:15,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:15,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-04 21:41:15,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660344090] [2021-06-04 21:41:15,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-04 21:41:15,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:15,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-04 21:41:15,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:41:15,872 INFO L87 Difference]: Start difference. First operand 1388 states and 3803 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:16,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:16,115 INFO L93 Difference]: Finished difference Result 2111 states and 5497 transitions. [2021-06-04 21:41:16,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-04 21:41:16,116 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-04 21:41:16,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:16,118 INFO L225 Difference]: With dead ends: 2111 [2021-06-04 21:41:16,118 INFO L226 Difference]: Without dead ends: 1841 [2021-06-04 21:41:16,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 235.3ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:41:16,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2021-06-04 21:41:16,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1463. [2021-06-04 21:41:16,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 2.7688098495212037) internal successors, (4048), 1462 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:16,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 4048 transitions. [2021-06-04 21:41:16,153 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 4048 transitions. Word has length 55 [2021-06-04 21:41:16,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:16,154 INFO L482 AbstractCegarLoop]: Abstraction has 1463 states and 4048 transitions. [2021-06-04 21:41:16,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:16,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 4048 transitions. [2021-06-04 21:41:16,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-04 21:41:16,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:16,156 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:16,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-04 21:41:16,373 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:16,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:16,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1664863172, now seen corresponding path program 8 times [2021-06-04 21:41:16,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:16,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251401] [2021-06-04 21:41:16,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:16,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:16,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:16,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251401] [2021-06-04 21:41:16,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:16,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790281675] [2021-06-04 21:41:16,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:16,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:41:16,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:16,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:41:16,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:16,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790281675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:16,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:16,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-04 21:41:16,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902575017] [2021-06-04 21:41:16,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-04 21:41:16,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:16,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-04 21:41:16,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-04 21:41:16,635 INFO L87 Difference]: Start difference. First operand 1463 states and 4048 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:16,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:16,850 INFO L93 Difference]: Finished difference Result 2858 states and 7631 transitions. [2021-06-04 21:41:16,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-04 21:41:16,850 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-04 21:41:16,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:16,855 INFO L225 Difference]: With dead ends: 2858 [2021-06-04 21:41:16,855 INFO L226 Difference]: Without dead ends: 2588 [2021-06-04 21:41:16,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:41:16,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-06-04 21:41:16,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1643. [2021-06-04 21:41:16,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 2.805724725943971) internal successors, (4607), 1642 states have internal predecessors, (4607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:16,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 4607 transitions. [2021-06-04 21:41:16,891 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 4607 transitions. Word has length 55 [2021-06-04 21:41:16,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:16,891 INFO L482 AbstractCegarLoop]: Abstraction has 1643 states and 4607 transitions. [2021-06-04 21:41:16,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:16,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 4607 transitions. [2021-06-04 21:41:16,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-04 21:41:16,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:16,895 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:17,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-04 21:41:17,118 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:17,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:17,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1687206422, now seen corresponding path program 9 times [2021-06-04 21:41:17,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:17,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558780537] [2021-06-04 21:41:17,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:17,189 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:17,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:17,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558780537] [2021-06-04 21:41:17,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558780537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:17,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481747326] [2021-06-04 21:41:17,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:17,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-04 21:41:17,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:17,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:41:17,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:17,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:17,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481747326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:17,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:17,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-04 21:41:17,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172159749] [2021-06-04 21:41:17,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-04 21:41:17,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:17,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-04 21:41:17,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:41:17,372 INFO L87 Difference]: Start difference. First operand 1643 states and 4607 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:17,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:17,744 INFO L93 Difference]: Finished difference Result 2726 states and 7296 transitions. [2021-06-04 21:41:17,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-04 21:41:17,744 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-04 21:41:17,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:17,748 INFO L225 Difference]: With dead ends: 2726 [2021-06-04 21:41:17,748 INFO L226 Difference]: Without dead ends: 2151 [2021-06-04 21:41:17,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 287.9ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:41:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-06-04 21:41:17,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 1678. [2021-06-04 21:41:17,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 2.7924865831842576) internal successors, (4683), 1677 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:17,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 4683 transitions. [2021-06-04 21:41:17,785 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 4683 transitions. Word has length 55 [2021-06-04 21:41:17,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:17,785 INFO L482 AbstractCegarLoop]: Abstraction has 1678 states and 4683 transitions. [2021-06-04 21:41:17,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:17,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 4683 transitions. [2021-06-04 21:41:17,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-04 21:41:17,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:17,788 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:18,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-04 21:41:18,011 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:18,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:18,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1642632502, now seen corresponding path program 10 times [2021-06-04 21:41:18,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:18,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265723023] [2021-06-04 21:41:18,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:18,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:18,111 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:18,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:18,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265723023] [2021-06-04 21:41:18,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265723023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:18,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109504306] [2021-06-04 21:41:18,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:18,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:41:18,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:18,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:41:18,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:18,316 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:18,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109504306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:18,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:18,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-04 21:41:18,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613466465] [2021-06-04 21:41:18,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:41:18,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:18,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:41:18,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:41:18,319 INFO L87 Difference]: Start difference. First operand 1678 states and 4683 transitions. Second operand has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:18,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:18,532 INFO L93 Difference]: Finished difference Result 2468 states and 6583 transitions. [2021-06-04 21:41:18,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-04 21:41:18,533 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-04 21:41:18,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:18,536 INFO L225 Difference]: With dead ends: 2468 [2021-06-04 21:41:18,537 INFO L226 Difference]: Without dead ends: 2134 [2021-06-04 21:41:18,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 197.4ms TimeCoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:41:18,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2021-06-04 21:41:18,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 1763. [2021-06-04 21:41:18,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 2.754256526674234) internal successors, (4853), 1762 states have internal predecessors, (4853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:18,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 4853 transitions. [2021-06-04 21:41:18,570 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 4853 transitions. Word has length 60 [2021-06-04 21:41:18,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:18,571 INFO L482 AbstractCegarLoop]: Abstraction has 1763 states and 4853 transitions. [2021-06-04 21:41:18,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:18,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 4853 transitions. [2021-06-04 21:41:18,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-04 21:41:18,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:18,573 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:18,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:18,796 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:18,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:18,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1005400838, now seen corresponding path program 11 times [2021-06-04 21:41:18,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:18,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978570814] [2021-06-04 21:41:18,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:18,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:18,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978570814] [2021-06-04 21:41:18,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978570814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:18,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885293906] [2021-06-04 21:41:18,876 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:18,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-04 21:41:18,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:18,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:41:18,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:19,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885293906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:19,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:19,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-04 21:41:19,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523056559] [2021-06-04 21:41:19,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-04 21:41:19,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:19,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-04 21:41:19,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-04 21:41:19,018 INFO L87 Difference]: Start difference. First operand 1763 states and 4853 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:19,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:19,169 INFO L93 Difference]: Finished difference Result 2561 states and 6577 transitions. [2021-06-04 21:41:19,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-04 21:41:19,170 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-04 21:41:19,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:19,173 INFO L225 Difference]: With dead ends: 2561 [2021-06-04 21:41:19,173 INFO L226 Difference]: Without dead ends: 2291 [2021-06-04 21:41:19,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 132.7ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-06-04 21:41:19,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2021-06-04 21:41:19,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 1778. [2021-06-04 21:41:19,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 2.7478897017445134) internal successors, (4883), 1777 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:19,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4883 transitions. [2021-06-04 21:41:19,202 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4883 transitions. Word has length 60 [2021-06-04 21:41:19,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:19,202 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 4883 transitions. [2021-06-04 21:41:19,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:19,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4883 transitions. [2021-06-04 21:41:19,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-04 21:41:19,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:19,204 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:19,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:19,417 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:19,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:19,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1024918474, now seen corresponding path program 12 times [2021-06-04 21:41:19,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:19,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003994300] [2021-06-04 21:41:19,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:19,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:19,508 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:19,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:19,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003994300] [2021-06-04 21:41:19,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003994300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:19,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784435271] [2021-06-04 21:41:19,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:19,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-04 21:41:19,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:19,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:41:19,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:19,681 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:19,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784435271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:19,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:19,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-04 21:41:19,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272528281] [2021-06-04 21:41:19,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-04 21:41:19,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:19,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-04 21:41:19,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:41:19,682 INFO L87 Difference]: Start difference. First operand 1778 states and 4883 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:19,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:19,926 INFO L93 Difference]: Finished difference Result 2446 states and 6347 transitions. [2021-06-04 21:41:19,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-04 21:41:19,927 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-04 21:41:19,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:19,930 INFO L225 Difference]: With dead ends: 2446 [2021-06-04 21:41:19,930 INFO L226 Difference]: Without dead ends: 2176 [2021-06-04 21:41:19,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 223.2ms TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:41:19,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-06-04 21:41:19,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1778. [2021-06-04 21:41:19,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 2.7478897017445134) internal successors, (4883), 1777 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:19,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4883 transitions. [2021-06-04 21:41:19,959 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4883 transitions. Word has length 60 [2021-06-04 21:41:19,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:19,960 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 4883 transitions. [2021-06-04 21:41:19,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:19,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4883 transitions. [2021-06-04 21:41:19,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-04 21:41:19,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:19,962 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:20,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-04 21:41:20,183 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:20,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:20,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1639157944, now seen corresponding path program 13 times [2021-06-04 21:41:20,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:20,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742380830] [2021-06-04 21:41:20,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:20,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:20,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742380830] [2021-06-04 21:41:20,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742380830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:20,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350961615] [2021-06-04 21:41:20,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:20,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:41:20,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:20,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350961615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:20,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:20,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-04 21:41:20,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021489241] [2021-06-04 21:41:20,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-04 21:41:20,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:20,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-04 21:41:20,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-04 21:41:20,420 INFO L87 Difference]: Start difference. First operand 1778 states and 4883 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:20,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:20,606 INFO L93 Difference]: Finished difference Result 2421 states and 6297 transitions. [2021-06-04 21:41:20,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-04 21:41:20,607 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-04 21:41:20,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:20,610 INFO L225 Difference]: With dead ends: 2421 [2021-06-04 21:41:20,610 INFO L226 Difference]: Without dead ends: 2151 [2021-06-04 21:41:20,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 159.2ms TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:41:20,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-06-04 21:41:20,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 1778. [2021-06-04 21:41:20,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 2.7478897017445134) internal successors, (4883), 1777 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:20,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4883 transitions. [2021-06-04 21:41:20,638 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4883 transitions. Word has length 60 [2021-06-04 21:41:20,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:20,639 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 4883 transitions. [2021-06-04 21:41:20,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:20,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4883 transitions. [2021-06-04 21:41:20,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-04 21:41:20,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:20,641 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:20,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:20,864 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:20,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:20,864 INFO L82 PathProgramCache]: Analyzing trace with hash -76084344, now seen corresponding path program 14 times [2021-06-04 21:41:20,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:20,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397265791] [2021-06-04 21:41:20,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:20,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:20,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397265791] [2021-06-04 21:41:20,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397265791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:20,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594318149] [2021-06-04 21:41:20,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:21,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:41:21,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:21,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:41:21,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:21,128 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:21,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594318149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:21,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:21,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-04 21:41:21,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84430508] [2021-06-04 21:41:21,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-04 21:41:21,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:21,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-04 21:41:21,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:41:21,130 INFO L87 Difference]: Start difference. First operand 1778 states and 4883 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:21,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:21,398 INFO L93 Difference]: Finished difference Result 2431 states and 6347 transitions. [2021-06-04 21:41:21,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:41:21,398 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-04 21:41:21,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:21,401 INFO L225 Difference]: With dead ends: 2431 [2021-06-04 21:41:21,402 INFO L226 Difference]: Without dead ends: 2161 [2021-06-04 21:41:21,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 226.2ms TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:41:21,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2021-06-04 21:41:21,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 1778. [2021-06-04 21:41:21,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 2.7507034327518287) internal successors, (4888), 1777 states have internal predecessors, (4888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:21,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4888 transitions. [2021-06-04 21:41:21,428 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4888 transitions. Word has length 60 [2021-06-04 21:41:21,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:21,428 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 4888 transitions. [2021-06-04 21:41:21,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:21,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4888 transitions. [2021-06-04 21:41:21,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-04 21:41:21,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:21,430 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:21,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-04 21:41:21,649 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:21,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:21,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1108731946, now seen corresponding path program 15 times [2021-06-04 21:41:21,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:21,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305849113] [2021-06-04 21:41:21,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:21,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:21,720 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:21,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:21,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305849113] [2021-06-04 21:41:21,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305849113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:21,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58619956] [2021-06-04 21:41:21,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:21,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-04 21:41:21,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:21,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:41:21,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:21,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58619956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:21,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:21,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-04 21:41:21,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821900634] [2021-06-04 21:41:21,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-04 21:41:21,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:21,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-04 21:41:21,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-04 21:41:21,921 INFO L87 Difference]: Start difference. First operand 1778 states and 4888 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:22,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:22,149 INFO L93 Difference]: Finished difference Result 3198 states and 8521 transitions. [2021-06-04 21:41:22,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-04 21:41:22,150 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-04 21:41:22,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:22,155 INFO L225 Difference]: With dead ends: 3198 [2021-06-04 21:41:22,155 INFO L226 Difference]: Without dead ends: 2928 [2021-06-04 21:41:22,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 175.3ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:41:22,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2928 states. [2021-06-04 21:41:22,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2928 to 1958. [2021-06-04 21:41:22,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1957 states have (on average 2.783341849770056) internal successors, (5447), 1957 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:22,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 5447 transitions. [2021-06-04 21:41:22,192 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 5447 transitions. Word has length 60 [2021-06-04 21:41:22,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:22,192 INFO L482 AbstractCegarLoop]: Abstraction has 1958 states and 5447 transitions. [2021-06-04 21:41:22,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:22,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 5447 transitions. [2021-06-04 21:41:22,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-04 21:41:22,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:22,195 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:22,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-04 21:41:22,409 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:22,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:22,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1086388696, now seen corresponding path program 16 times [2021-06-04 21:41:22,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:22,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502652284] [2021-06-04 21:41:22,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:22,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:22,487 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:22,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:22,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502652284] [2021-06-04 21:41:22,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502652284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:22,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487578983] [2021-06-04 21:41:22,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:22,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:41:22,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:22,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:41:22,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:22,669 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:22,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487578983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:22,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:22,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-04 21:41:22,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109414051] [2021-06-04 21:41:22,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-04 21:41:22,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:22,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-04 21:41:22,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-04 21:41:22,670 INFO L87 Difference]: Start difference. First operand 1958 states and 5447 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:23,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:23,056 INFO L93 Difference]: Finished difference Result 3021 states and 8021 transitions. [2021-06-04 21:41:23,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-04 21:41:23,056 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-04 21:41:23,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:23,060 INFO L225 Difference]: With dead ends: 3021 [2021-06-04 21:41:23,060 INFO L226 Difference]: Without dead ends: 2446 [2021-06-04 21:41:23,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 331.0ms TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:41:23,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-06-04 21:41:23,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 1603. [2021-06-04 21:41:23,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 2.7265917602996255) internal successors, (4368), 1602 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:23,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 4368 transitions. [2021-06-04 21:41:23,089 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 4368 transitions. Word has length 60 [2021-06-04 21:41:23,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:23,089 INFO L482 AbstractCegarLoop]: Abstraction has 1603 states and 4368 transitions. [2021-06-04 21:41:23,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:23,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 4368 transitions. [2021-06-04 21:41:23,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:41:23,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:23,091 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:23,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-04 21:41:23,309 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:23,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:23,309 INFO L82 PathProgramCache]: Analyzing trace with hash -423019465, now seen corresponding path program 17 times [2021-06-04 21:41:23,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:23,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328995687] [2021-06-04 21:41:23,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:23,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:23,409 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:23,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:23,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328995687] [2021-06-04 21:41:23,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328995687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:23,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329336083] [2021-06-04 21:41:23,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:23,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-04 21:41:23,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:23,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:41:23,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:23,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329336083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:23,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:23,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-04 21:41:23,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639293522] [2021-06-04 21:41:23,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-04 21:41:23,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:23,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-04 21:41:23,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-04 21:41:23,601 INFO L87 Difference]: Start difference. First operand 1603 states and 4368 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:23,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:23,865 INFO L93 Difference]: Finished difference Result 2321 states and 6007 transitions. [2021-06-04 21:41:23,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-04 21:41:23,866 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-04 21:41:23,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:23,868 INFO L225 Difference]: With dead ends: 2321 [2021-06-04 21:41:23,868 INFO L226 Difference]: Without dead ends: 2051 [2021-06-04 21:41:23,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 236.0ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:41:23,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-06-04 21:41:23,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1678. [2021-06-04 21:41:23,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 2.738819320214669) internal successors, (4593), 1677 states have internal predecessors, (4593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:23,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 4593 transitions. [2021-06-04 21:41:23,907 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 4593 transitions. Word has length 65 [2021-06-04 21:41:23,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:23,907 INFO L482 AbstractCegarLoop]: Abstraction has 1678 states and 4593 transitions. [2021-06-04 21:41:23,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:23,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 4593 transitions. [2021-06-04 21:41:23,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:41:23,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:23,910 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:24,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-04 21:41:24,125 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:24,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:24,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1607299847, now seen corresponding path program 18 times [2021-06-04 21:41:24,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:24,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759717371] [2021-06-04 21:41:24,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:24,235 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:24,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:24,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759717371] [2021-06-04 21:41:24,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759717371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:24,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216907197] [2021-06-04 21:41:24,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:24,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-04 21:41:24,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:24,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:41:24,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:24,453 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:24,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216907197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:24,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:24,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-04 21:41:24,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816876092] [2021-06-04 21:41:24,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:41:24,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:24,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:41:24,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:41:24,455 INFO L87 Difference]: Start difference. First operand 1678 states and 4593 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:24,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:24,692 INFO L93 Difference]: Finished difference Result 2491 states and 6422 transitions. [2021-06-04 21:41:24,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:41:24,692 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-04 21:41:24,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:24,694 INFO L225 Difference]: With dead ends: 2491 [2021-06-04 21:41:24,694 INFO L226 Difference]: Without dead ends: 2221 [2021-06-04 21:41:24,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 243.2ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:41:24,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2021-06-04 21:41:24,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 1753. [2021-06-04 21:41:24,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1752 states have (on average 2.75) internal successors, (4818), 1752 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:24,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 4818 transitions. [2021-06-04 21:41:24,721 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 4818 transitions. Word has length 65 [2021-06-04 21:41:24,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:24,721 INFO L482 AbstractCegarLoop]: Abstraction has 1753 states and 4818 transitions. [2021-06-04 21:41:24,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:24,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 4818 transitions. [2021-06-04 21:41:24,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:41:24,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:24,724 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:24,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-04 21:41:24,939 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:24,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:24,939 INFO L82 PathProgramCache]: Analyzing trace with hash -2073427979, now seen corresponding path program 19 times [2021-06-04 21:41:24,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:24,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16936923] [2021-06-04 21:41:24,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:25,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:25,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16936923] [2021-06-04 21:41:25,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16936923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:25,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006108771] [2021-06-04 21:41:25,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:25,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:25,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:41:25,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:25,202 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:25,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006108771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:25,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:25,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-04 21:41:25,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332190023] [2021-06-04 21:41:25,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-04 21:41:25,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:25,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-04 21:41:25,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-04 21:41:25,204 INFO L87 Difference]: Start difference. First operand 1753 states and 4818 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:25,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:25,432 INFO L93 Difference]: Finished difference Result 2566 states and 6677 transitions. [2021-06-04 21:41:25,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-04 21:41:25,437 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-04 21:41:25,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:25,439 INFO L225 Difference]: With dead ends: 2566 [2021-06-04 21:41:25,440 INFO L226 Difference]: Without dead ends: 2296 [2021-06-04 21:41:25,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 208.3ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:41:25,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-06-04 21:41:25,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1828. [2021-06-04 21:41:25,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1827 states have (on average 2.768472906403941) internal successors, (5058), 1827 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:25,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 5058 transitions. [2021-06-04 21:41:25,470 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 5058 transitions. Word has length 65 [2021-06-04 21:41:25,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:25,470 INFO L482 AbstractCegarLoop]: Abstraction has 1828 states and 5058 transitions. [2021-06-04 21:41:25,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:25,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 5058 transitions. [2021-06-04 21:41:25,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:41:25,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:25,472 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:25,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:25,695 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:25,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:25,695 INFO L82 PathProgramCache]: Analyzing trace with hash 506297029, now seen corresponding path program 20 times [2021-06-04 21:41:25,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:25,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782242564] [2021-06-04 21:41:25,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:25,781 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:25,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:25,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782242564] [2021-06-04 21:41:25,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782242564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:25,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581788774] [2021-06-04 21:41:25,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:25,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:41:25,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:25,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:41:25,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:25,965 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:25,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581788774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:25,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:25,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-04 21:41:25,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472100326] [2021-06-04 21:41:25,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:41:25,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:25,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:41:25,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:41:25,967 INFO L87 Difference]: Start difference. First operand 1828 states and 5058 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:26,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:26,331 INFO L93 Difference]: Finished difference Result 3144 states and 8303 transitions. [2021-06-04 21:41:26,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:41:26,331 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-04 21:41:26,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:26,334 INFO L225 Difference]: With dead ends: 3144 [2021-06-04 21:41:26,334 INFO L226 Difference]: Without dead ends: 2521 [2021-06-04 21:41:26,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 325.8ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:41:26,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2021-06-04 21:41:26,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 1903. [2021-06-04 21:41:26,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1902 states have (on average 2.780231335436383) internal successors, (5288), 1902 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:26,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 5288 transitions. [2021-06-04 21:41:26,366 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 5288 transitions. Word has length 65 [2021-06-04 21:41:26,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:26,366 INFO L482 AbstractCegarLoop]: Abstraction has 1903 states and 5288 transitions. [2021-06-04 21:41:26,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:26,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 5288 transitions. [2021-06-04 21:41:26,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:41:26,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:26,369 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:26,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-04 21:41:26,591 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:26,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:26,591 INFO L82 PathProgramCache]: Analyzing trace with hash -526350573, now seen corresponding path program 21 times [2021-06-04 21:41:26,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:26,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801236313] [2021-06-04 21:41:26,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:26,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:26,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:26,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801236313] [2021-06-04 21:41:26,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801236313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:26,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955947678] [2021-06-04 21:41:26,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:26,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-04 21:41:26,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:26,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:41:26,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:26,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955947678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:26,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:26,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-04 21:41:26,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232738234] [2021-06-04 21:41:26,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-04 21:41:26,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:26,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-04 21:41:26,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-04 21:41:26,839 INFO L87 Difference]: Start difference. First operand 1903 states and 5288 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:27,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:27,075 INFO L93 Difference]: Finished difference Result 3348 states and 8971 transitions. [2021-06-04 21:41:27,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-04 21:41:27,075 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-04 21:41:27,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:27,078 INFO L225 Difference]: With dead ends: 3348 [2021-06-04 21:41:27,078 INFO L226 Difference]: Without dead ends: 3078 [2021-06-04 21:41:27,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 214.0ms TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:41:27,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-06-04 21:41:27,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 2083. [2021-06-04 21:41:27,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 2.80835734870317) internal successors, (5847), 2082 states have internal predecessors, (5847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:27,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 5847 transitions. [2021-06-04 21:41:27,112 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 5847 transitions. Word has length 65 [2021-06-04 21:41:27,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:27,112 INFO L482 AbstractCegarLoop]: Abstraction has 2083 states and 5847 transitions. [2021-06-04 21:41:27,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:27,112 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 5847 transitions. [2021-06-04 21:41:27,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:41:27,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:27,114 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:27,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:27,329 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:27,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:27,329 INFO L82 PathProgramCache]: Analyzing trace with hash -504007323, now seen corresponding path program 22 times [2021-06-04 21:41:27,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:27,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045167495] [2021-06-04 21:41:27,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:27,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:27,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045167495] [2021-06-04 21:41:27,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045167495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:27,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265950389] [2021-06-04 21:41:27,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:27,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:41:27,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:27,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:41:27,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:27,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265950389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:27,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:27,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-04 21:41:27,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374200735] [2021-06-04 21:41:27,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:41:27,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:27,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:41:27,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:41:27,581 INFO L87 Difference]: Start difference. First operand 2083 states and 5847 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:27,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:27,959 INFO L93 Difference]: Finished difference Result 3216 states and 8636 transitions. [2021-06-04 21:41:27,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:41:27,960 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-04 21:41:27,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:27,962 INFO L225 Difference]: With dead ends: 3216 [2021-06-04 21:41:27,962 INFO L226 Difference]: Without dead ends: 2641 [2021-06-04 21:41:27,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 318.8ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:41:27,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2641 states. [2021-06-04 21:41:27,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2641 to 1524. [2021-06-04 21:41:27,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 1523 states have (on average 2.7288246881155613) internal successors, (4156), 1523 states have internal predecessors, (4156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:27,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 4156 transitions. [2021-06-04 21:41:27,986 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 4156 transitions. Word has length 65 [2021-06-04 21:41:27,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:27,986 INFO L482 AbstractCegarLoop]: Abstraction has 1524 states and 4156 transitions. [2021-06-04 21:41:27,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:27,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 4156 transitions. [2021-06-04 21:41:27,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:41:27,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:27,988 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:28,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-04 21:41:28,201 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:28,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:28,201 INFO L82 PathProgramCache]: Analyzing trace with hash 2053970119, now seen corresponding path program 23 times [2021-06-04 21:41:28,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:28,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991956730] [2021-06-04 21:41:28,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:28,310 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:28,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:28,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991956730] [2021-06-04 21:41:28,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991956730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:28,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497626144] [2021-06-04 21:41:28,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:28,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-04 21:41:28,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:28,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:41:28,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:28,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497626144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:28,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:28,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-06-04 21:41:28,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392615917] [2021-06-04 21:41:28,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:41:28,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:28,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:41:28,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:28,563 INFO L87 Difference]: Start difference. First operand 1524 states and 4156 transitions. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:28,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:28,800 INFO L93 Difference]: Finished difference Result 2364 states and 6156 transitions. [2021-06-04 21:41:28,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:41:28,800 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-04 21:41:28,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:28,802 INFO L225 Difference]: With dead ends: 2364 [2021-06-04 21:41:28,802 INFO L226 Difference]: Without dead ends: 2030 [2021-06-04 21:41:28,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 253.3ms TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:41:28,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2030 states. [2021-06-04 21:41:28,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2030 to 1609. [2021-06-04 21:41:28,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1608 states have (on average 2.6902985074626864) internal successors, (4326), 1608 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:28,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 4326 transitions. [2021-06-04 21:41:28,824 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 4326 transitions. Word has length 70 [2021-06-04 21:41:28,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:28,825 INFO L482 AbstractCegarLoop]: Abstraction has 1609 states and 4326 transitions. [2021-06-04 21:41:28,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:28,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 4326 transitions. [2021-06-04 21:41:28,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:41:28,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:28,827 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:29,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:29,049 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:29,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:29,050 INFO L82 PathProgramCache]: Analyzing trace with hash -778605685, now seen corresponding path program 24 times [2021-06-04 21:41:29,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:29,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83647904] [2021-06-04 21:41:29,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:29,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:29,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83647904] [2021-06-04 21:41:29,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83647904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:29,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68546144] [2021-06-04 21:41:29,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:29,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-04 21:41:29,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:29,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:41:29,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:29,337 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:29,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68546144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:29,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:29,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-04 21:41:29,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844919336] [2021-06-04 21:41:29,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:41:29,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:29,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:41:29,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:41:29,339 INFO L87 Difference]: Start difference. First operand 1609 states and 4326 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:29,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:29,503 INFO L93 Difference]: Finished difference Result 2686 states and 6737 transitions. [2021-06-04 21:41:29,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-04 21:41:29,503 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-04 21:41:29,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:29,506 INFO L225 Difference]: With dead ends: 2686 [2021-06-04 21:41:29,506 INFO L226 Difference]: Without dead ends: 2416 [2021-06-04 21:41:29,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 173.5ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:41:29,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-06-04 21:41:29,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 1753. [2021-06-04 21:41:29,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1752 states have (on average 2.7071917808219177) internal successors, (4743), 1752 states have internal predecessors, (4743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:29,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 4743 transitions. [2021-06-04 21:41:29,529 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 4743 transitions. Word has length 70 [2021-06-04 21:41:29,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:29,529 INFO L482 AbstractCegarLoop]: Abstraction has 1753 states and 4743 transitions. [2021-06-04 21:41:29,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:29,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 4743 transitions. [2021-06-04 21:41:29,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:41:29,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:29,532 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:29,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-04 21:41:29,743 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:29,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:29,744 INFO L82 PathProgramCache]: Analyzing trace with hash 220290651, now seen corresponding path program 25 times [2021-06-04 21:41:29,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:29,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656948713] [2021-06-04 21:41:29,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:29,851 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:29,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:29,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656948713] [2021-06-04 21:41:29,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656948713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:29,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126532715] [2021-06-04 21:41:29,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:29,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:41:29,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:30,015 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:30,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126532715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:30,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:30,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-04 21:41:30,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450827293] [2021-06-04 21:41:30,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:41:30,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:30,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:41:30,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:41:30,016 INFO L87 Difference]: Start difference. First operand 1753 states and 4743 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:30,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:30,230 INFO L93 Difference]: Finished difference Result 2646 states and 6732 transitions. [2021-06-04 21:41:30,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:41:30,231 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-04 21:41:30,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:30,233 INFO L225 Difference]: With dead ends: 2646 [2021-06-04 21:41:30,233 INFO L226 Difference]: Without dead ends: 2376 [2021-06-04 21:41:30,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 223.1ms TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:41:30,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2021-06-04 21:41:30,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 1828. [2021-06-04 21:41:30,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1827 states have (on average 2.7192118226600983) internal successors, (4968), 1827 states have internal predecessors, (4968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:30,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 4968 transitions. [2021-06-04 21:41:30,252 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 4968 transitions. Word has length 70 [2021-06-04 21:41:30,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:30,252 INFO L482 AbstractCegarLoop]: Abstraction has 1828 states and 4968 transitions. [2021-06-04 21:41:30,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:30,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 4968 transitions. [2021-06-04 21:41:30,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:41:30,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:30,253 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:30,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:30,457 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:30,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:30,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1659037239, now seen corresponding path program 26 times [2021-06-04 21:41:30,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:30,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5014047] [2021-06-04 21:41:30,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:30,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:30,589 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:30,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:30,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5014047] [2021-06-04 21:41:30,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5014047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:30,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932616830] [2021-06-04 21:41:30,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:30,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:41:30,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:30,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:41:30,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:30,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932616830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:30,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:30,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-04 21:41:30,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146207119] [2021-06-04 21:41:30,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:41:30,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:30,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:41:30,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:41:30,779 INFO L87 Difference]: Start difference. First operand 1828 states and 4968 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:30,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:30,966 INFO L93 Difference]: Finished difference Result 2696 states and 6907 transitions. [2021-06-04 21:41:30,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-04 21:41:30,966 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-04 21:41:30,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:30,968 INFO L225 Difference]: With dead ends: 2696 [2021-06-04 21:41:30,968 INFO L226 Difference]: Without dead ends: 2426 [2021-06-04 21:41:30,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 185.8ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:41:30,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-06-04 21:41:30,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1903. [2021-06-04 21:41:30,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1902 states have (on average 2.730283911671924) internal successors, (5193), 1902 states have internal predecessors, (5193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:30,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 5193 transitions. [2021-06-04 21:41:30,992 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 5193 transitions. Word has length 70 [2021-06-04 21:41:30,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:30,992 INFO L482 AbstractCegarLoop]: Abstraction has 1903 states and 5193 transitions. [2021-06-04 21:41:30,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:30,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 5193 transitions. [2021-06-04 21:41:30,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:41:30,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:30,994 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:31,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-04 21:41:31,213 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:31,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:31,213 INFO L82 PathProgramCache]: Analyzing trace with hash 371282073, now seen corresponding path program 27 times [2021-06-04 21:41:31,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:31,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151076958] [2021-06-04 21:41:31,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:31,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:31,313 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:31,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:31,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151076958] [2021-06-04 21:41:31,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151076958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:31,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626033769] [2021-06-04 21:41:31,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:31,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-04 21:41:31,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:31,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:41:31,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:31,500 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:31,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626033769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:31,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:31,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-04 21:41:31,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783567903] [2021-06-04 21:41:31,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:41:31,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:31,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:41:31,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:41:31,501 INFO L87 Difference]: Start difference. First operand 1903 states and 5193 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:31,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:31,773 INFO L93 Difference]: Finished difference Result 2721 states and 7032 transitions. [2021-06-04 21:41:31,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-04 21:41:31,774 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-04 21:41:31,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:31,776 INFO L225 Difference]: With dead ends: 2721 [2021-06-04 21:41:31,776 INFO L226 Difference]: Without dead ends: 2451 [2021-06-04 21:41:31,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 258.6ms TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:41:31,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-06-04 21:41:31,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1978. [2021-06-04 21:41:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 2.74051593323217) internal successors, (5418), 1977 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:31,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 5418 transitions. [2021-06-04 21:41:31,803 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 5418 transitions. Word has length 70 [2021-06-04 21:41:31,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:31,803 INFO L482 AbstractCegarLoop]: Abstraction has 1978 states and 5418 transitions. [2021-06-04 21:41:31,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:31,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 5418 transitions. [2021-06-04 21:41:31,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:41:31,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:31,805 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:32,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:32,027 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:32,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:32,027 INFO L82 PathProgramCache]: Analyzing trace with hash 985521543, now seen corresponding path program 28 times [2021-06-04 21:41:32,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:32,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749997262] [2021-06-04 21:41:32,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:32,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:32,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:32,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749997262] [2021-06-04 21:41:32,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749997262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:32,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093136677] [2021-06-04 21:41:32,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:32,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:41:32,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:32,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:41:32,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:32,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093136677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:32,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:32,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-04 21:41:32,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348612371] [2021-06-04 21:41:32,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:41:32,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:32,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:41:32,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:41:32,272 INFO L87 Difference]: Start difference. First operand 1978 states and 5418 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:32,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:32,503 INFO L93 Difference]: Finished difference Result 2791 states and 7277 transitions. [2021-06-04 21:41:32,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-04 21:41:32,503 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-04 21:41:32,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:32,505 INFO L225 Difference]: With dead ends: 2791 [2021-06-04 21:41:32,506 INFO L226 Difference]: Without dead ends: 2521 [2021-06-04 21:41:32,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 197.6ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:41:32,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2021-06-04 21:41:32,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 2053. [2021-06-04 21:41:32,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 2.757309941520468) internal successors, (5658), 2052 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:32,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 5658 transitions. [2021-06-04 21:41:32,527 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 5658 transitions. Word has length 70 [2021-06-04 21:41:32,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:32,527 INFO L482 AbstractCegarLoop]: Abstraction has 2053 states and 5658 transitions. [2021-06-04 21:41:32,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:32,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 5658 transitions. [2021-06-04 21:41:32,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:41:32,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:32,530 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:32,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-04 21:41:32,733 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:32,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:32,733 INFO L82 PathProgramCache]: Analyzing trace with hash -729720745, now seen corresponding path program 29 times [2021-06-04 21:41:32,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:32,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483825254] [2021-06-04 21:41:32,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:32,817 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:32,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:32,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483825254] [2021-06-04 21:41:32,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483825254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:32,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413650158] [2021-06-04 21:41:32,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:32,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-04 21:41:32,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:32,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:41:32,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:32,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413650158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:32,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:32,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-04 21:41:32,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484508769] [2021-06-04 21:41:32,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:41:32,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:32,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:41:32,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:41:32,978 INFO L87 Difference]: Start difference. First operand 2053 states and 5658 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:33,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:33,358 INFO L93 Difference]: Finished difference Result 3369 states and 8903 transitions. [2021-06-04 21:41:33,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:41:33,359 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-04 21:41:33,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:33,361 INFO L225 Difference]: With dead ends: 3369 [2021-06-04 21:41:33,361 INFO L226 Difference]: Without dead ends: 2746 [2021-06-04 21:41:33,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 326.6ms TimeCoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:41:33,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2021-06-04 21:41:33,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 2128. [2021-06-04 21:41:33,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.768218147625764) internal successors, (5888), 2127 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:33,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5888 transitions. [2021-06-04 21:41:33,390 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5888 transitions. Word has length 70 [2021-06-04 21:41:33,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:33,390 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5888 transitions. [2021-06-04 21:41:33,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:33,390 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5888 transitions. [2021-06-04 21:41:33,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:41:33,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:33,393 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:33,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-04 21:41:33,609 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:33,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:33,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1762368347, now seen corresponding path program 30 times [2021-06-04 21:41:33,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:33,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15795846] [2021-06-04 21:41:33,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:33,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:33,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15795846] [2021-06-04 21:41:33,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15795846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:33,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330863742] [2021-06-04 21:41:33,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:33,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-04 21:41:33,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:33,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:41:33,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:33,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330863742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:33,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:33,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-04 21:41:33,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907349692] [2021-06-04 21:41:33,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:41:33,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:33,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:41:33,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:41:33,872 INFO L87 Difference]: Start difference. First operand 2128 states and 5888 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:34,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:34,129 INFO L93 Difference]: Finished difference Result 3598 states and 9621 transitions. [2021-06-04 21:41:34,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-04 21:41:34,129 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-04 21:41:34,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:34,133 INFO L225 Difference]: With dead ends: 3598 [2021-06-04 21:41:34,133 INFO L226 Difference]: Without dead ends: 3328 [2021-06-04 21:41:34,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 220.9ms TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:41:34,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2021-06-04 21:41:34,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 2308. [2021-06-04 21:41:34,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2308 states, 2307 states have (on average 2.7945383615084527) internal successors, (6447), 2307 states have internal predecessors, (6447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:34,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 6447 transitions. [2021-06-04 21:41:34,158 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 6447 transitions. Word has length 70 [2021-06-04 21:41:34,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:34,160 INFO L482 AbstractCegarLoop]: Abstraction has 2308 states and 6447 transitions. [2021-06-04 21:41:34,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:34,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 6447 transitions. [2021-06-04 21:41:34,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:41:34,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:34,163 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:34,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-04 21:41:34,364 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:34,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:34,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1740025097, now seen corresponding path program 31 times [2021-06-04 21:41:34,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:34,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391365696] [2021-06-04 21:41:34,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:34,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:34,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391365696] [2021-06-04 21:41:34,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391365696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:34,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539548956] [2021-06-04 21:41:34,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:34,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:41:34,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:34,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539548956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:34,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:34,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-04 21:41:34,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608665077] [2021-06-04 21:41:34,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:41:34,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:34,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:41:34,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:41:34,658 INFO L87 Difference]: Start difference. First operand 2308 states and 6447 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:35,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:35,139 INFO L93 Difference]: Finished difference Result 3421 states and 9121 transitions. [2021-06-04 21:41:35,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-04 21:41:35,139 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-04 21:41:35,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:35,142 INFO L225 Difference]: With dead ends: 3421 [2021-06-04 21:41:35,142 INFO L226 Difference]: Without dead ends: 2846 [2021-06-04 21:41:35,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 409.3ms TimeCoverageRelationStatistics Valid=357, Invalid=1049, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:41:35,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-06-04 21:41:35,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 1803. [2021-06-04 21:41:35,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1802 states have (on average 2.7291897891231964) internal successors, (4918), 1802 states have internal predecessors, (4918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:35,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 4918 transitions. [2021-06-04 21:41:35,174 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 4918 transitions. Word has length 70 [2021-06-04 21:41:35,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:35,174 INFO L482 AbstractCegarLoop]: Abstraction has 1803 states and 4918 transitions. [2021-06-04 21:41:35,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:35,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 4918 transitions. [2021-06-04 21:41:35,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:41:35,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:35,176 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:35,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-04 21:41:35,393 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:35,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:35,393 INFO L82 PathProgramCache]: Analyzing trace with hash 751678088, now seen corresponding path program 32 times [2021-06-04 21:41:35,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:35,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786165625] [2021-06-04 21:41:35,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:35,501 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:35,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:35,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786165625] [2021-06-04 21:41:35,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786165625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:35,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112399545] [2021-06-04 21:41:35,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:35,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:41:35,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:35,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:41:35,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:35,688 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:35,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112399545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:35,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:35,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-04 21:41:35,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697668928] [2021-06-04 21:41:35,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:41:35,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:35,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:41:35,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:41:35,689 INFO L87 Difference]: Start difference. First operand 1803 states and 4918 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:35,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:35,888 INFO L93 Difference]: Finished difference Result 2621 states and 6757 transitions. [2021-06-04 21:41:35,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:41:35,889 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-04 21:41:35,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:35,891 INFO L225 Difference]: With dead ends: 2621 [2021-06-04 21:41:35,891 INFO L226 Difference]: Without dead ends: 2351 [2021-06-04 21:41:35,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 207.2ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:41:35,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-04 21:41:35,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1878. [2021-06-04 21:41:35,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 2.7400106553010124) internal successors, (5143), 1877 states have internal predecessors, (5143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:35,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 5143 transitions. [2021-06-04 21:41:35,916 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 5143 transitions. Word has length 75 [2021-06-04 21:41:35,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:35,916 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 5143 transitions. [2021-06-04 21:41:35,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:35,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 5143 transitions. [2021-06-04 21:41:35,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:41:35,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:35,919 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:36,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:36,141 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:36,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:36,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1750574424, now seen corresponding path program 33 times [2021-06-04 21:41:36,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:36,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166381284] [2021-06-04 21:41:36,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:36,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:36,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166381284] [2021-06-04 21:41:36,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166381284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:36,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965846189] [2021-06-04 21:41:36,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:36,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-04 21:41:36,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:36,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:41:36,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:36,454 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:36,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965846189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:36,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:36,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-04 21:41:36,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712146202] [2021-06-04 21:41:36,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:41:36,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:36,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:41:36,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:41:36,455 INFO L87 Difference]: Start difference. First operand 1878 states and 5143 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:36,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:36,751 INFO L93 Difference]: Finished difference Result 2841 states and 7272 transitions. [2021-06-04 21:41:36,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-04 21:41:36,752 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-04 21:41:36,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:36,754 INFO L225 Difference]: With dead ends: 2841 [2021-06-04 21:41:36,754 INFO L226 Difference]: Without dead ends: 2571 [2021-06-04 21:41:36,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 296.7ms TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:41:36,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-06-04 21:41:36,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 1953. [2021-06-04 21:41:36,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 2.75) internal successors, (5368), 1952 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:36,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 5368 transitions. [2021-06-04 21:41:36,777 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 5368 transitions. Word has length 75 [2021-06-04 21:41:36,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:36,777 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 5368 transitions. [2021-06-04 21:41:36,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:36,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 5368 transitions. [2021-06-04 21:41:36,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:41:36,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:36,779 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:36,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-04 21:41:36,980 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:36,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:36,980 INFO L82 PathProgramCache]: Analyzing trace with hash -128753466, now seen corresponding path program 34 times [2021-06-04 21:41:36,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:36,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229206836] [2021-06-04 21:41:36,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:36,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:37,090 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:37,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:37,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229206836] [2021-06-04 21:41:37,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229206836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:37,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856148584] [2021-06-04 21:41:37,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:37,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:41:37,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:37,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:41:37,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:37,294 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:37,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856148584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:37,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:37,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-04 21:41:37,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655253595] [2021-06-04 21:41:37,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:41:37,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:37,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:41:37,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:41:37,295 INFO L87 Difference]: Start difference. First operand 1953 states and 5368 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:37,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:37,531 INFO L93 Difference]: Finished difference Result 2871 states and 7407 transitions. [2021-06-04 21:41:37,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-04 21:41:37,531 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-04 21:41:37,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:37,534 INFO L225 Difference]: With dead ends: 2871 [2021-06-04 21:41:37,534 INFO L226 Difference]: Without dead ends: 2601 [2021-06-04 21:41:37,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 241.7ms TimeCoverageRelationStatistics Valid=248, Invalid=744, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:41:37,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-06-04 21:41:37,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2028. [2021-06-04 21:41:37,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.759250123334978) internal successors, (5593), 2027 states have internal predecessors, (5593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:37,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5593 transitions. [2021-06-04 21:41:37,562 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5593 transitions. Word has length 75 [2021-06-04 21:41:37,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:37,562 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5593 transitions. [2021-06-04 21:41:37,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:37,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5593 transitions. [2021-06-04 21:41:37,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:41:37,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:37,565 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:37,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-04 21:41:37,779 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:37,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:37,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1901565846, now seen corresponding path program 35 times [2021-06-04 21:41:37,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:37,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242180084] [2021-06-04 21:41:37,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:37,886 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:37,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:37,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242180084] [2021-06-04 21:41:37,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242180084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:37,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130528459] [2021-06-04 21:41:37,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:37,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-04 21:41:37,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:37,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:41:37,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:38,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130528459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:38,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:38,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-04 21:41:38,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566314223] [2021-06-04 21:41:38,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:41:38,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:38,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:41:38,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:41:38,083 INFO L87 Difference]: Start difference. First operand 2028 states and 5593 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:38,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:38,384 INFO L93 Difference]: Finished difference Result 2896 states and 7532 transitions. [2021-06-04 21:41:38,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:41:38,384 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-04 21:41:38,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:38,386 INFO L225 Difference]: With dead ends: 2896 [2021-06-04 21:41:38,386 INFO L226 Difference]: Without dead ends: 2626 [2021-06-04 21:41:38,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 291.2ms TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:41:38,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-06-04 21:41:38,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 2103. [2021-06-04 21:41:38,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2103 states, 2102 states have (on average 2.7678401522359657) internal successors, (5818), 2102 states have internal predecessors, (5818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:38,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 5818 transitions. [2021-06-04 21:41:38,408 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 5818 transitions. Word has length 75 [2021-06-04 21:41:38,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:38,408 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 5818 transitions. [2021-06-04 21:41:38,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:38,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 5818 transitions. [2021-06-04 21:41:38,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:41:38,410 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:38,410 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:38,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:38,610 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:38,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:38,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1779161980, now seen corresponding path program 36 times [2021-06-04 21:41:38,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:38,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733030493] [2021-06-04 21:41:38,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:38,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:38,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733030493] [2021-06-04 21:41:38,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733030493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:38,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065124583] [2021-06-04 21:41:38,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:38,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-04 21:41:38,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:38,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:41:38,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:38,855 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:38,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065124583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:38,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:38,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-04 21:41:38,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442064083] [2021-06-04 21:41:38,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:41:38,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:38,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:41:38,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:41:38,857 INFO L87 Difference]: Start difference. First operand 2103 states and 5818 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:39,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:39,129 INFO L93 Difference]: Finished difference Result 2966 states and 7777 transitions. [2021-06-04 21:41:39,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-04 21:41:39,129 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-04 21:41:39,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:39,131 INFO L225 Difference]: With dead ends: 2966 [2021-06-04 21:41:39,131 INFO L226 Difference]: Without dead ends: 2696 [2021-06-04 21:41:39,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 242.1ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:41:39,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-06-04 21:41:39,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2178. [2021-06-04 21:41:39,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2177 states have (on average 2.782728525493799) internal successors, (6058), 2177 states have internal predecessors, (6058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:39,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 6058 transitions. [2021-06-04 21:41:39,155 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 6058 transitions. Word has length 75 [2021-06-04 21:41:39,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:39,155 INFO L482 AbstractCegarLoop]: Abstraction has 2178 states and 6058 transitions. [2021-06-04 21:41:39,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:39,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 6058 transitions. [2021-06-04 21:41:39,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:41:39,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:39,158 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:39,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-04 21:41:39,358 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:39,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:39,359 INFO L82 PathProgramCache]: Analyzing trace with hash 800563028, now seen corresponding path program 37 times [2021-06-04 21:41:39,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:39,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168108685] [2021-06-04 21:41:39,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:39,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:39,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168108685] [2021-06-04 21:41:39,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168108685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:39,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449801649] [2021-06-04 21:41:39,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:39,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:41:39,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:39,610 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:39,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449801649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:39,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:39,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-04 21:41:39,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175919245] [2021-06-04 21:41:39,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:41:39,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:39,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:41:39,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:41:39,612 INFO L87 Difference]: Start difference. First operand 2178 states and 6058 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:39,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:39,990 INFO L93 Difference]: Finished difference Result 3544 states and 9403 transitions. [2021-06-04 21:41:39,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:41:39,990 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-04 21:41:39,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:39,993 INFO L225 Difference]: With dead ends: 3544 [2021-06-04 21:41:39,993 INFO L226 Difference]: Without dead ends: 2921 [2021-06-04 21:41:39,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 337.5ms TimeCoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:41:39,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-06-04 21:41:40,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2253. [2021-06-04 21:41:40,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7921847246891653) internal successors, (6288), 2252 states have internal predecessors, (6288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:40,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6288 transitions. [2021-06-04 21:41:40,016 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6288 transitions. Word has length 75 [2021-06-04 21:41:40,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:40,016 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6288 transitions. [2021-06-04 21:41:40,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:40,016 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6288 transitions. [2021-06-04 21:41:40,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:41:40,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:40,019 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:40,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:40,233 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:40,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:40,233 INFO L82 PathProgramCache]: Analyzing trace with hash -232084574, now seen corresponding path program 38 times [2021-06-04 21:41:40,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:40,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364795710] [2021-06-04 21:41:40,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:40,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:40,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:40,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364795710] [2021-06-04 21:41:40,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364795710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:40,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624059929] [2021-06-04 21:41:40,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:40,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:41:40,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:40,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:41:40,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:40,530 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:40,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624059929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:40,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:40,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-04 21:41:40,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27552382] [2021-06-04 21:41:40,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:41:40,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:40,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:41:40,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:41:40,531 INFO L87 Difference]: Start difference. First operand 2253 states and 6288 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:40,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:40,870 INFO L93 Difference]: Finished difference Result 3748 states and 10071 transitions. [2021-06-04 21:41:40,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:41:40,871 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-04 21:41:40,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:40,875 INFO L225 Difference]: With dead ends: 3748 [2021-06-04 21:41:40,875 INFO L226 Difference]: Without dead ends: 3478 [2021-06-04 21:41:40,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 294.7ms TimeCoverageRelationStatistics Valid=355, Invalid=905, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:41:40,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-06-04 21:41:40,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 2433. [2021-06-04 21:41:40,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 2432 states have (on average 2.815378289473684) internal successors, (6847), 2432 states have internal predecessors, (6847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:40,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 6847 transitions. [2021-06-04 21:41:40,912 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 6847 transitions. Word has length 75 [2021-06-04 21:41:40,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:40,912 INFO L482 AbstractCegarLoop]: Abstraction has 2433 states and 6847 transitions. [2021-06-04 21:41:40,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:40,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 6847 transitions. [2021-06-04 21:41:40,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:41:40,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:40,915 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:41,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-04 21:41:41,139 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:41,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:41,139 INFO L82 PathProgramCache]: Analyzing trace with hash -209741324, now seen corresponding path program 39 times [2021-06-04 21:41:41,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:41,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549489409] [2021-06-04 21:41:41,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:41,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:41,239 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:41,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:41,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549489409] [2021-06-04 21:41:41,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549489409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:41,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992664422] [2021-06-04 21:41:41,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:41,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-04 21:41:41,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:41,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:41:41,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:41,429 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:41,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992664422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:41,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:41,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-04 21:41:41,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888016293] [2021-06-04 21:41:41,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:41:41,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:41,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:41:41,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:41:41,431 INFO L87 Difference]: Start difference. First operand 2433 states and 6847 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:41,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:41,913 INFO L93 Difference]: Finished difference Result 3616 states and 9736 transitions. [2021-06-04 21:41:41,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:41:41,914 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-04 21:41:41,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:41,916 INFO L225 Difference]: With dead ends: 3616 [2021-06-04 21:41:41,916 INFO L226 Difference]: Without dead ends: 3041 [2021-06-04 21:41:41,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 447.3ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-04 21:41:41,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2021-06-04 21:41:41,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 1724. [2021-06-04 21:41:41,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 2.731282646546721) internal successors, (4706), 1723 states have internal predecessors, (4706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:41,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 4706 transitions. [2021-06-04 21:41:41,936 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 4706 transitions. Word has length 75 [2021-06-04 21:41:41,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:41,936 INFO L482 AbstractCegarLoop]: Abstraction has 1724 states and 4706 transitions. [2021-06-04 21:41:41,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:41,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 4706 transitions. [2021-06-04 21:41:41,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:41:41,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:41,938 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:42,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:42,138 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:42,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:42,139 INFO L82 PathProgramCache]: Analyzing trace with hash 452139800, now seen corresponding path program 40 times [2021-06-04 21:41:42,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:42,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348992149] [2021-06-04 21:41:42,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:42,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:42,267 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:42,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:42,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348992149] [2021-06-04 21:41:42,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348992149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:42,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109202590] [2021-06-04 21:41:42,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:42,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:41:42,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:42,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:41:42,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:42,495 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:42,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109202590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:42,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:42,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-06-04 21:41:42,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207412344] [2021-06-04 21:41:42,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:41:42,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:42,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:41:42,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:41:42,497 INFO L87 Difference]: Start difference. First operand 1724 states and 4706 transitions. Second operand has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:42,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:42,765 INFO L93 Difference]: Finished difference Result 2614 states and 6806 transitions. [2021-06-04 21:41:42,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-04 21:41:42,766 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:41:42,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:42,768 INFO L225 Difference]: With dead ends: 2614 [2021-06-04 21:41:42,768 INFO L226 Difference]: Without dead ends: 2280 [2021-06-04 21:41:42,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 296.1ms TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:41:42,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2021-06-04 21:41:42,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 1809. [2021-06-04 21:41:42,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 2.6969026548672566) internal successors, (4876), 1808 states have internal predecessors, (4876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:42,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 4876 transitions. [2021-06-04 21:41:42,788 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 4876 transitions. Word has length 80 [2021-06-04 21:41:42,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:42,789 INFO L482 AbstractCegarLoop]: Abstraction has 1809 states and 4876 transitions. [2021-06-04 21:41:42,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:42,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 4876 transitions. [2021-06-04 21:41:42,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:41:42,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:42,790 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:42,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-04 21:41:42,991 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:42,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:42,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1173866716, now seen corresponding path program 41 times [2021-06-04 21:41:42,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:42,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360914453] [2021-06-04 21:41:42,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:43,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:43,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360914453] [2021-06-04 21:41:43,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360914453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:43,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443920823] [2021-06-04 21:41:43,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:43,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-04 21:41:43,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:43,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:41:43,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:43,317 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:43,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443920823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:43,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:43,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-04 21:41:43,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175749441] [2021-06-04 21:41:43,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:41:43,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:43,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:41:43,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:41:43,318 INFO L87 Difference]: Start difference. First operand 1809 states and 4876 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:43,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:43,521 INFO L93 Difference]: Finished difference Result 3036 states and 7587 transitions. [2021-06-04 21:41:43,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-04 21:41:43,521 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:41:43,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:43,525 INFO L225 Difference]: With dead ends: 3036 [2021-06-04 21:41:43,525 INFO L226 Difference]: Without dead ends: 2766 [2021-06-04 21:41:43,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 220.1ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:41:43,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2021-06-04 21:41:43,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 1953. [2021-06-04 21:41:43,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 2.711577868852459) internal successors, (5293), 1952 states have internal predecessors, (5293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:43,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 5293 transitions. [2021-06-04 21:41:43,554 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 5293 transitions. Word has length 80 [2021-06-04 21:41:43,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:43,555 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 5293 transitions. [2021-06-04 21:41:43,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:43,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 5293 transitions. [2021-06-04 21:41:43,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:41:43,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:43,557 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:43,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-04 21:41:43,769 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:43,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:43,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1794345044, now seen corresponding path program 42 times [2021-06-04 21:41:43,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:43,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30705796] [2021-06-04 21:41:43,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:43,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:43,887 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:43,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:43,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30705796] [2021-06-04 21:41:43,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30705796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:43,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422925852] [2021-06-04 21:41:43,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:43,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-04 21:41:43,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:43,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:41:43,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:44,109 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:44,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422925852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:44,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:44,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-04 21:41:44,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805471872] [2021-06-04 21:41:44,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:41:44,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:44,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:41:44,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:44,110 INFO L87 Difference]: Start difference. First operand 1953 states and 5293 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:44,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:44,359 INFO L93 Difference]: Finished difference Result 2996 states and 7582 transitions. [2021-06-04 21:41:44,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-04 21:41:44,359 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:41:44,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:44,362 INFO L225 Difference]: With dead ends: 2996 [2021-06-04 21:41:44,362 INFO L226 Difference]: Without dead ends: 2726 [2021-06-04 21:41:44,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 305.9ms TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:41:44,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2021-06-04 21:41:44,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 2028. [2021-06-04 21:41:44,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.7222496299950665) internal successors, (5518), 2027 states have internal predecessors, (5518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:44,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5518 transitions. [2021-06-04 21:41:44,385 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5518 transitions. Word has length 80 [2021-06-04 21:41:44,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:44,385 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5518 transitions. [2021-06-04 21:41:44,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:44,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5518 transitions. [2021-06-04 21:41:44,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:41:44,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:44,388 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:44,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:44,589 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:44,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:44,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1340128870, now seen corresponding path program 43 times [2021-06-04 21:41:44,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:44,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559956088] [2021-06-04 21:41:44,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:44,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:44,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:44,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559956088] [2021-06-04 21:41:44,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559956088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:44,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535295340] [2021-06-04 21:41:44,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:44,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:41:44,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:44,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535295340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:44,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:44,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-04 21:41:44,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301623295] [2021-06-04 21:41:44,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:41:44,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:44,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:41:44,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:41:44,884 INFO L87 Difference]: Start difference. First operand 2028 states and 5518 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:45,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:45,148 INFO L93 Difference]: Finished difference Result 3046 states and 7757 transitions. [2021-06-04 21:41:45,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-04 21:41:45,149 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:41:45,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:45,152 INFO L225 Difference]: With dead ends: 3046 [2021-06-04 21:41:45,152 INFO L226 Difference]: Without dead ends: 2776 [2021-06-04 21:41:45,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 267.2ms TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:41:45,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-06-04 21:41:45,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2103. [2021-06-04 21:41:45,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2103 states, 2102 states have (on average 2.7321598477640343) internal successors, (5743), 2102 states have internal predecessors, (5743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:45,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 5743 transitions. [2021-06-04 21:41:45,173 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 5743 transitions. Word has length 80 [2021-06-04 21:41:45,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:45,173 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 5743 transitions. [2021-06-04 21:41:45,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:45,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 5743 transitions. [2021-06-04 21:41:45,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:41:45,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:45,176 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:45,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-04 21:41:45,377 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:45,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:45,377 INFO L82 PathProgramCache]: Analyzing trace with hash -341232534, now seen corresponding path program 44 times [2021-06-04 21:41:45,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:45,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570243000] [2021-06-04 21:41:45,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:45,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:45,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570243000] [2021-06-04 21:41:45,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570243000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:45,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385177591] [2021-06-04 21:41:45,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:45,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:41:45,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:45,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:41:45,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:45,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385177591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:45,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:45,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-04 21:41:45,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81901124] [2021-06-04 21:41:45,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:41:45,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:45,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:41:45,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:45,663 INFO L87 Difference]: Start difference. First operand 2103 states and 5743 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:45,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:45,971 INFO L93 Difference]: Finished difference Result 3071 states and 7882 transitions. [2021-06-04 21:41:45,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:41:45,972 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:41:45,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:45,974 INFO L225 Difference]: With dead ends: 3071 [2021-06-04 21:41:45,974 INFO L226 Difference]: Without dead ends: 2801 [2021-06-04 21:41:45,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 305.9ms TimeCoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:41:45,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2021-06-04 21:41:45,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2178. [2021-06-04 21:41:45,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2177 states have (on average 2.7413872301332107) internal successors, (5968), 2177 states have internal predecessors, (5968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:45,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 5968 transitions. [2021-06-04 21:41:45,997 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 5968 transitions. Word has length 80 [2021-06-04 21:41:45,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:45,997 INFO L482 AbstractCegarLoop]: Abstraction has 2178 states and 5968 transitions. [2021-06-04 21:41:45,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:45,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 5968 transitions. [2021-06-04 21:41:45,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:41:45,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:45,999 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:46,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:46,201 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:46,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:46,201 INFO L82 PathProgramCache]: Analyzing trace with hash 2074406872, now seen corresponding path program 45 times [2021-06-04 21:41:46,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:46,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420962497] [2021-06-04 21:41:46,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:46,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:46,306 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:46,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:46,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420962497] [2021-06-04 21:41:46,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420962497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:46,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632989917] [2021-06-04 21:41:46,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:46,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-04 21:41:46,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:46,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:41:46,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:46,489 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:46,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632989917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:46,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:46,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-04 21:41:46,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467616113] [2021-06-04 21:41:46,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:41:46,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:46,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:41:46,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:41:46,490 INFO L87 Difference]: Start difference. First operand 2178 states and 5968 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:46,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:46,740 INFO L93 Difference]: Finished difference Result 3096 states and 8007 transitions. [2021-06-04 21:41:46,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-04 21:41:46,740 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:41:46,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:46,743 INFO L225 Difference]: With dead ends: 3096 [2021-06-04 21:41:46,743 INFO L226 Difference]: Without dead ends: 2826 [2021-06-04 21:41:46,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 247.8ms TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:41:46,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2021-06-04 21:41:46,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2253. [2021-06-04 21:41:46,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.75) internal successors, (6193), 2252 states have internal predecessors, (6193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:46,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6193 transitions. [2021-06-04 21:41:46,766 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6193 transitions. Word has length 80 [2021-06-04 21:41:46,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:46,766 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6193 transitions. [2021-06-04 21:41:46,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:46,766 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6193 transitions. [2021-06-04 21:41:46,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:41:46,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:46,768 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:46,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:46,977 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:46,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:46,977 INFO L82 PathProgramCache]: Analyzing trace with hash -190241112, now seen corresponding path program 46 times [2021-06-04 21:41:46,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:46,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209300981] [2021-06-04 21:41:46,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:46,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:47,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:47,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209300981] [2021-06-04 21:41:47,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209300981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:47,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24306090] [2021-06-04 21:41:47,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:47,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:41:47,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:47,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:41:47,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:47,274 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:47,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24306090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:47,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:47,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-04 21:41:47,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821436862] [2021-06-04 21:41:47,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:41:47,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:47,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:41:47,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:47,276 INFO L87 Difference]: Start difference. First operand 2253 states and 6193 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:47,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:47,654 INFO L93 Difference]: Finished difference Result 3121 states and 8132 transitions. [2021-06-04 21:41:47,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:41:47,655 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:41:47,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:47,657 INFO L225 Difference]: With dead ends: 3121 [2021-06-04 21:41:47,657 INFO L226 Difference]: Without dead ends: 2851 [2021-06-04 21:41:47,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 364.6ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:41:47,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-06-04 21:41:47,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2328. [2021-06-04 21:41:47,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 2.758057584873227) internal successors, (6418), 2327 states have internal predecessors, (6418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:47,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 6418 transitions. [2021-06-04 21:41:47,681 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 6418 transitions. Word has length 80 [2021-06-04 21:41:47,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:47,681 INFO L482 AbstractCegarLoop]: Abstraction has 2328 states and 6418 transitions. [2021-06-04 21:41:47,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:47,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 6418 transitions. [2021-06-04 21:41:47,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:41:47,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:47,683 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:47,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-04 21:41:47,883 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:47,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:47,884 INFO L82 PathProgramCache]: Analyzing trace with hash 423998358, now seen corresponding path program 47 times [2021-06-04 21:41:47,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:47,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777642062] [2021-06-04 21:41:47,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:47,993 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:47,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:47,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777642062] [2021-06-04 21:41:47,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777642062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:47,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395955708] [2021-06-04 21:41:47,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:48,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-04 21:41:48,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:48,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:41:48,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:48,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395955708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:48,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:48,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-04 21:41:48,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916301209] [2021-06-04 21:41:48,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:41:48,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:48,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:41:48,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:41:48,169 INFO L87 Difference]: Start difference. First operand 2328 states and 6418 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:48,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:48,477 INFO L93 Difference]: Finished difference Result 3191 states and 8377 transitions. [2021-06-04 21:41:48,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-04 21:41:48,477 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:41:48,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:48,480 INFO L225 Difference]: With dead ends: 3191 [2021-06-04 21:41:48,480 INFO L226 Difference]: Without dead ends: 2921 [2021-06-04 21:41:48,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 299.7ms TimeCoverageRelationStatistics Valid=305, Invalid=885, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:41:48,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-06-04 21:41:48,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2403. [2021-06-04 21:41:48,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2403 states, 2402 states have (on average 2.7718567860116567) internal successors, (6658), 2402 states have internal predecessors, (6658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:48,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2403 states to 2403 states and 6658 transitions. [2021-06-04 21:41:48,525 INFO L78 Accepts]: Start accepts. Automaton has 2403 states and 6658 transitions. Word has length 80 [2021-06-04 21:41:48,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:48,525 INFO L482 AbstractCegarLoop]: Abstraction has 2403 states and 6658 transitions. [2021-06-04 21:41:48,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:48,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2403 states and 6658 transitions. [2021-06-04 21:41:48,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:41:48,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:48,527 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:48,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:48,728 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:48,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:48,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1291243930, now seen corresponding path program 48 times [2021-06-04 21:41:48,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:48,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016002435] [2021-06-04 21:41:48,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:48,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:48,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:48,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016002435] [2021-06-04 21:41:48,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016002435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:48,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417885609] [2021-06-04 21:41:48,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:48,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-04 21:41:48,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:48,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:41:48,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:49,027 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:49,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417885609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:49,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:49,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-04 21:41:49,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231224257] [2021-06-04 21:41:49,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:41:49,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:49,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:41:49,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:49,028 INFO L87 Difference]: Start difference. First operand 2403 states and 6658 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:49,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:49,472 INFO L93 Difference]: Finished difference Result 3769 states and 10003 transitions. [2021-06-04 21:41:49,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:41:49,473 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:41:49,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:49,476 INFO L225 Difference]: With dead ends: 3769 [2021-06-04 21:41:49,476 INFO L226 Difference]: Without dead ends: 3146 [2021-06-04 21:41:49,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 388.1ms TimeCoverageRelationStatistics Valid=401, Invalid=1239, Unknown=0, NotChecked=0, Total=1640 [2021-06-04 21:41:49,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2021-06-04 21:41:49,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 2478. [2021-06-04 21:41:49,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7807832054905126) internal successors, (6888), 2477 states have internal predecessors, (6888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:49,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6888 transitions. [2021-06-04 21:41:49,499 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6888 transitions. Word has length 80 [2021-06-04 21:41:49,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:49,499 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6888 transitions. [2021-06-04 21:41:49,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:49,500 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6888 transitions. [2021-06-04 21:41:49,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:41:49,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:49,501 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:49,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-04 21:41:49,715 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:49,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:49,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1971075764, now seen corresponding path program 49 times [2021-06-04 21:41:49,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:49,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91934498] [2021-06-04 21:41:49,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:49,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:49,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91934498] [2021-06-04 21:41:49,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91934498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:49,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491751961] [2021-06-04 21:41:49,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:49,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:49,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:41:49,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:49,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491751961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:49,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:49,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-04 21:41:49,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156029627] [2021-06-04 21:41:49,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:41:49,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:49,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:41:49,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:41:49,997 INFO L87 Difference]: Start difference. First operand 2478 states and 6888 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:50,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:50,320 INFO L93 Difference]: Finished difference Result 3998 states and 10721 transitions. [2021-06-04 21:41:50,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:41:50,320 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:41:50,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:50,324 INFO L225 Difference]: With dead ends: 3998 [2021-06-04 21:41:50,324 INFO L226 Difference]: Without dead ends: 3728 [2021-06-04 21:41:50,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 300.3ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:41:50,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2021-06-04 21:41:50,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 2658. [2021-06-04 21:41:50,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2658 states, 2657 states have (on average 2.8027850959729017) internal successors, (7447), 2657 states have internal predecessors, (7447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:50,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 7447 transitions. [2021-06-04 21:41:50,357 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 7447 transitions. Word has length 80 [2021-06-04 21:41:50,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:50,357 INFO L482 AbstractCegarLoop]: Abstraction has 2658 states and 7447 transitions. [2021-06-04 21:41:50,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:50,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 7447 transitions. [2021-06-04 21:41:50,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:41:50,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:50,359 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:50,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-04 21:41:50,567 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:50,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:50,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1993419014, now seen corresponding path program 50 times [2021-06-04 21:41:50,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:50,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604197813] [2021-06-04 21:41:50,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:50,665 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:50,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:50,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604197813] [2021-06-04 21:41:50,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604197813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:50,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979882040] [2021-06-04 21:41:50,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:50,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:41:50,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:50,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:41:50,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:50,849 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:50,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979882040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:50,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:50,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-04 21:41:50,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889795550] [2021-06-04 21:41:50,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:41:50,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:50,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:41:50,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:50,851 INFO L87 Difference]: Start difference. First operand 2658 states and 7447 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:51,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:51,368 INFO L93 Difference]: Finished difference Result 3821 states and 10221 transitions. [2021-06-04 21:41:51,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:41:51,369 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-04 21:41:51,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:51,372 INFO L225 Difference]: With dead ends: 3821 [2021-06-04 21:41:51,372 INFO L226 Difference]: Without dead ends: 3246 [2021-06-04 21:41:51,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 468.0ms TimeCoverageRelationStatistics Valid=484, Invalid=1408, Unknown=0, NotChecked=0, Total=1892 [2021-06-04 21:41:51,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3246 states. [2021-06-04 21:41:51,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3246 to 2003. [2021-06-04 21:41:51,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 2.7312687312687314) internal successors, (5468), 2002 states have internal predecessors, (5468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:51,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 5468 transitions. [2021-06-04 21:41:51,394 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 5468 transitions. Word has length 80 [2021-06-04 21:41:51,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:51,395 INFO L482 AbstractCegarLoop]: Abstraction has 2003 states and 5468 transitions. [2021-06-04 21:41:51,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:51,395 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 5468 transitions. [2021-06-04 21:41:51,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:41:51,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:51,396 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:51,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-04 21:41:51,597 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:51,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:51,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1150498713, now seen corresponding path program 51 times [2021-06-04 21:41:51,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:51,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388354383] [2021-06-04 21:41:51,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:51,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:51,732 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:51,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:51,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388354383] [2021-06-04 21:41:51,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388354383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:51,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261342050] [2021-06-04 21:41:51,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:51,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-04 21:41:51,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:51,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:41:51,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:51,929 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:51,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261342050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:51,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:51,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-04 21:41:51,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003501960] [2021-06-04 21:41:51,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:41:51,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:51,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:41:51,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:51,930 INFO L87 Difference]: Start difference. First operand 2003 states and 5468 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:52,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:52,178 INFO L93 Difference]: Finished difference Result 2921 states and 7507 transitions. [2021-06-04 21:41:52,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-04 21:41:52,178 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-04 21:41:52,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:52,181 INFO L225 Difference]: With dead ends: 2921 [2021-06-04 21:41:52,181 INFO L226 Difference]: Without dead ends: 2651 [2021-06-04 21:41:52,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 264.7ms TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:41:52,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2021-06-04 21:41:52,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2078. [2021-06-04 21:41:52,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2078 states, 2077 states have (on average 2.740972556571979) internal successors, (5693), 2077 states have internal predecessors, (5693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:52,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 5693 transitions. [2021-06-04 21:41:52,200 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 5693 transitions. Word has length 85 [2021-06-04 21:41:52,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:52,200 INFO L482 AbstractCegarLoop]: Abstraction has 2078 states and 5693 transitions. [2021-06-04 21:41:52,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:52,200 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 5693 transitions. [2021-06-04 21:41:52,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:41:52,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:52,202 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:52,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-04 21:41:52,402 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:52,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:52,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1817713047, now seen corresponding path program 52 times [2021-06-04 21:41:52,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:52,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70988118] [2021-06-04 21:41:52,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:52,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:52,523 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:52,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:52,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70988118] [2021-06-04 21:41:52,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70988118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:52,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332029919] [2021-06-04 21:41:52,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:52,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:41:52,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:52,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:41:52,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:52,719 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:52,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332029919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:52,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:52,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-04 21:41:52,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736994603] [2021-06-04 21:41:52,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:41:52,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:52,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:41:52,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:41:52,720 INFO L87 Difference]: Start difference. First operand 2078 states and 5693 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:53,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:53,016 INFO L93 Difference]: Finished difference Result 3191 states and 8122 transitions. [2021-06-04 21:41:53,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:41:53,017 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-04 21:41:53,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:53,019 INFO L225 Difference]: With dead ends: 3191 [2021-06-04 21:41:53,019 INFO L226 Difference]: Without dead ends: 2921 [2021-06-04 21:41:53,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 315.0ms TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:41:53,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-06-04 21:41:53,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2153. [2021-06-04 21:41:53,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 2.75) internal successors, (5918), 2152 states have internal predecessors, (5918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:53,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 5918 transitions. [2021-06-04 21:41:53,040 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 5918 transitions. Word has length 85 [2021-06-04 21:41:53,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:53,040 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 5918 transitions. [2021-06-04 21:41:53,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:53,040 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 5918 transitions. [2021-06-04 21:41:53,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:41:53,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:53,042 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:53,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:53,242 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:53,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:53,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1363496873, now seen corresponding path program 53 times [2021-06-04 21:41:53,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:53,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707484898] [2021-06-04 21:41:53,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:53,372 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:53,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:53,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707484898] [2021-06-04 21:41:53,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707484898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:53,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127554140] [2021-06-04 21:41:53,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:53,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-04 21:41:53,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:53,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:41:53,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:53,541 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:53,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127554140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:53,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:53,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-04 21:41:53,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768726630] [2021-06-04 21:41:53,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:41:53,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:53,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:41:53,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:53,542 INFO L87 Difference]: Start difference. First operand 2153 states and 5918 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:53,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:53,822 INFO L93 Difference]: Finished difference Result 3221 states and 8257 transitions. [2021-06-04 21:41:53,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-04 21:41:53,822 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-04 21:41:53,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:53,824 INFO L225 Difference]: With dead ends: 3221 [2021-06-04 21:41:53,825 INFO L226 Difference]: Without dead ends: 2951 [2021-06-04 21:41:53,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 297.6ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:41:53,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-06-04 21:41:53,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2228. [2021-06-04 21:41:53,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2227 states have (on average 2.7584193982936687) internal successors, (6143), 2227 states have internal predecessors, (6143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:53,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 6143 transitions. [2021-06-04 21:41:53,849 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 6143 transitions. Word has length 85 [2021-06-04 21:41:53,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:53,849 INFO L482 AbstractCegarLoop]: Abstraction has 2228 states and 6143 transitions. [2021-06-04 21:41:53,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:53,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 6143 transitions. [2021-06-04 21:41:53,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:41:53,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:53,852 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:54,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:54,055 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:54,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:54,055 INFO L82 PathProgramCache]: Analyzing trace with hash -364600537, now seen corresponding path program 54 times [2021-06-04 21:41:54,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:54,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354021854] [2021-06-04 21:41:54,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:54,203 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:54,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:54,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354021854] [2021-06-04 21:41:54,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354021854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:54,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204502655] [2021-06-04 21:41:54,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:54,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-04 21:41:54,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:54,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:41:54,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:54,417 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:54,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204502655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:54,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:54,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-04 21:41:54,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254873690] [2021-06-04 21:41:54,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:41:54,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:54,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:41:54,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:41:54,418 INFO L87 Difference]: Start difference. First operand 2228 states and 6143 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:54,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:54,785 INFO L93 Difference]: Finished difference Result 3246 states and 8382 transitions. [2021-06-04 21:41:54,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:41:54,785 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-04 21:41:54,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:54,788 INFO L225 Difference]: With dead ends: 3246 [2021-06-04 21:41:54,788 INFO L226 Difference]: Without dead ends: 2976 [2021-06-04 21:41:54,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 369.4ms TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:41:54,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2021-06-04 21:41:54,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 2303. [2021-06-04 21:41:54,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2302 states have (on average 2.7662901824500437) internal successors, (6368), 2302 states have internal predecessors, (6368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:54,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 6368 transitions. [2021-06-04 21:41:54,814 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 6368 transitions. Word has length 85 [2021-06-04 21:41:54,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:54,814 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 6368 transitions. [2021-06-04 21:41:54,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:54,814 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 6368 transitions. [2021-06-04 21:41:54,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:41:54,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:54,816 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:55,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:55,016 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:55,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:55,017 INFO L82 PathProgramCache]: Analyzing trace with hash 2051038869, now seen corresponding path program 55 times [2021-06-04 21:41:55,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:55,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665452881] [2021-06-04 21:41:55,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:55,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:55,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665452881] [2021-06-04 21:41:55,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665452881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:55,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941704011] [2021-06-04 21:41:55,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:55,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:41:55,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:55,288 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:55,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941704011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:55,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:55,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-04 21:41:55,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207768092] [2021-06-04 21:41:55,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:41:55,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:55,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:41:55,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:55,290 INFO L87 Difference]: Start difference. First operand 2303 states and 6368 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:55,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:55,607 INFO L93 Difference]: Finished difference Result 3271 states and 8507 transitions. [2021-06-04 21:41:55,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:41:55,608 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-04 21:41:55,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:55,610 INFO L225 Difference]: With dead ends: 3271 [2021-06-04 21:41:55,610 INFO L226 Difference]: Without dead ends: 3001 [2021-06-04 21:41:55,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 296.2ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:41:55,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-06-04 21:41:55,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 2378. [2021-06-04 21:41:55,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.7736642827092974) internal successors, (6593), 2377 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:55,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6593 transitions. [2021-06-04 21:41:55,634 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6593 transitions. Word has length 85 [2021-06-04 21:41:55,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:55,634 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6593 transitions. [2021-06-04 21:41:55,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:55,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6593 transitions. [2021-06-04 21:41:55,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:41:55,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:55,637 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:55,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-04 21:41:55,837 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:55,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:55,838 INFO L82 PathProgramCache]: Analyzing trace with hash -213609115, now seen corresponding path program 56 times [2021-06-04 21:41:55,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:55,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966935826] [2021-06-04 21:41:55,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:55,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:55,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:55,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966935826] [2021-06-04 21:41:55,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966935826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:55,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221572743] [2021-06-04 21:41:55,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:56,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:41:56,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:56,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:41:56,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:56,134 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:56,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221572743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:56,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:56,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-04 21:41:56,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587168322] [2021-06-04 21:41:56,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:41:56,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:56,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:41:56,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:41:56,135 INFO L87 Difference]: Start difference. First operand 2378 states and 6593 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:56,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:56,519 INFO L93 Difference]: Finished difference Result 3296 states and 8632 transitions. [2021-06-04 21:41:56,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:41:56,519 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-04 21:41:56,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:56,522 INFO L225 Difference]: With dead ends: 3296 [2021-06-04 21:41:56,522 INFO L226 Difference]: Without dead ends: 3026 [2021-06-04 21:41:56,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 366.6ms TimeCoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2021-06-04 21:41:56,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2021-06-04 21:41:56,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 2453. [2021-06-04 21:41:56,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2452 states have (on average 2.7805872756933114) internal successors, (6818), 2452 states have internal predecessors, (6818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:56,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 6818 transitions. [2021-06-04 21:41:56,546 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 6818 transitions. Word has length 85 [2021-06-04 21:41:56,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:56,547 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 6818 transitions. [2021-06-04 21:41:56,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:56,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 6818 transitions. [2021-06-04 21:41:56,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:41:56,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:56,549 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:56,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:56,749 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:56,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:56,750 INFO L82 PathProgramCache]: Analyzing trace with hash 400630355, now seen corresponding path program 57 times [2021-06-04 21:41:56,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:56,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505832307] [2021-06-04 21:41:56,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:56,855 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:56,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:56,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505832307] [2021-06-04 21:41:56,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505832307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:56,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085296221] [2021-06-04 21:41:56,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:56,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-04 21:41:56,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:56,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:41:56,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:57,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085296221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:57,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:57,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-04 21:41:57,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782768761] [2021-06-04 21:41:57,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:41:57,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:57,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:41:57,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:57,026 INFO L87 Difference]: Start difference. First operand 2453 states and 6818 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:57,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:57,352 INFO L93 Difference]: Finished difference Result 3366 states and 8877 transitions. [2021-06-04 21:41:57,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-04 21:41:57,353 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-04 21:41:57,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:57,356 INFO L225 Difference]: With dead ends: 3366 [2021-06-04 21:41:57,356 INFO L226 Difference]: Without dead ends: 3096 [2021-06-04 21:41:57,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 309.9ms TimeCoverageRelationStatistics Valid=413, Invalid=1147, Unknown=0, NotChecked=0, Total=1560 [2021-06-04 21:41:57,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3096 states. [2021-06-04 21:41:57,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3096 to 2528. [2021-06-04 21:41:57,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2527 states have (on average 2.7930352196280173) internal successors, (7058), 2527 states have internal predecessors, (7058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:57,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 7058 transitions. [2021-06-04 21:41:57,382 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 7058 transitions. Word has length 85 [2021-06-04 21:41:57,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:57,382 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 7058 transitions. [2021-06-04 21:41:57,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:57,382 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 7058 transitions. [2021-06-04 21:41:57,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:41:57,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:57,384 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:57,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-04 21:41:57,585 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:57,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:57,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1314611933, now seen corresponding path program 58 times [2021-06-04 21:41:57,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:57,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309465563] [2021-06-04 21:41:57,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:57,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:57,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309465563] [2021-06-04 21:41:57,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309465563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:57,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853868220] [2021-06-04 21:41:57,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:57,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:41:57,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:57,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:41:57,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:57,918 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:57,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853868220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:57,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:57,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-04 21:41:57,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457526822] [2021-06-04 21:41:57,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:41:57,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:57,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:41:57,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:41:57,919 INFO L87 Difference]: Start difference. First operand 2528 states and 7058 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:58,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:58,442 INFO L93 Difference]: Finished difference Result 3944 states and 10503 transitions. [2021-06-04 21:41:58,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:41:58,442 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-04 21:41:58,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:58,445 INFO L225 Difference]: With dead ends: 3944 [2021-06-04 21:41:58,445 INFO L226 Difference]: Without dead ends: 3321 [2021-06-04 21:41:58,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 469.1ms TimeCoverageRelationStatistics Valid=463, Invalid=1429, Unknown=0, NotChecked=0, Total=1892 [2021-06-04 21:41:58,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-06-04 21:41:58,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2603. [2021-06-04 21:41:58,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.800922367409685) internal successors, (7288), 2602 states have internal predecessors, (7288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:58,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7288 transitions. [2021-06-04 21:41:58,468 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7288 transitions. Word has length 85 [2021-06-04 21:41:58,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:58,468 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7288 transitions. [2021-06-04 21:41:58,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:58,469 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7288 transitions. [2021-06-04 21:41:58,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:41:58,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:58,470 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:58,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:58,671 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:58,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:58,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1947707761, now seen corresponding path program 59 times [2021-06-04 21:41:58,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:58,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467481527] [2021-06-04 21:41:58,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:58,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:58,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467481527] [2021-06-04 21:41:58,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467481527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:58,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435739252] [2021-06-04 21:41:58,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:58,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-04 21:41:58,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:58,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:41:58,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:58,980 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:58,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435739252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:58,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:58,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-04 21:41:58,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807811894] [2021-06-04 21:41:58,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:41:58,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:58,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:41:58,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:58,981 INFO L87 Difference]: Start difference. First operand 2603 states and 7288 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:59,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:59,338 INFO L93 Difference]: Finished difference Result 4148 states and 11171 transitions. [2021-06-04 21:41:59,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:41:59,338 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-04 21:41:59,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:59,342 INFO L225 Difference]: With dead ends: 4148 [2021-06-04 21:41:59,342 INFO L226 Difference]: Without dead ends: 3878 [2021-06-04 21:41:59,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 332.5ms TimeCoverageRelationStatistics Valid=489, Invalid=1233, Unknown=0, NotChecked=0, Total=1722 [2021-06-04 21:41:59,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2021-06-04 21:41:59,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 2783. [2021-06-04 21:41:59,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 2.8206326383896476) internal successors, (7847), 2782 states have internal predecessors, (7847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:59,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 7847 transitions. [2021-06-04 21:41:59,369 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 7847 transitions. Word has length 85 [2021-06-04 21:41:59,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:59,369 INFO L482 AbstractCegarLoop]: Abstraction has 2783 states and 7847 transitions. [2021-06-04 21:41:59,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:59,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 7847 transitions. [2021-06-04 21:41:59,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:41:59,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:59,371 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:41:59,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-04 21:41:59,572 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:59,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:59,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1970051011, now seen corresponding path program 60 times [2021-06-04 21:41:59,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:59,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359819016] [2021-06-04 21:41:59,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:59,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:59,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359819016] [2021-06-04 21:41:59,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359819016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:59,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916245931] [2021-06-04 21:41:59,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:59,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-04 21:41:59,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:59,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:41:59,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:59,856 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:59,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916245931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:59,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:59,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-04 21:41:59,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704973624] [2021-06-04 21:41:59,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:41:59,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:59,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:41:59,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:41:59,858 INFO L87 Difference]: Start difference. First operand 2783 states and 7847 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:00,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:00,386 INFO L93 Difference]: Finished difference Result 4016 states and 10836 transitions. [2021-06-04 21:42:00,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:42:00,386 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-04 21:42:00,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:00,390 INFO L225 Difference]: With dead ends: 4016 [2021-06-04 21:42:00,390 INFO L226 Difference]: Without dead ends: 3441 [2021-06-04 21:42:00,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 489.9ms TimeCoverageRelationStatistics Valid=554, Invalid=1608, Unknown=0, NotChecked=0, Total=2162 [2021-06-04 21:42:00,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2021-06-04 21:42:00,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 1924. [2021-06-04 21:42:00,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 2.733229329173167) internal successors, (5256), 1923 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:00,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5256 transitions. [2021-06-04 21:42:00,410 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5256 transitions. Word has length 85 [2021-06-04 21:42:00,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:00,410 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 5256 transitions. [2021-06-04 21:42:00,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:00,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5256 transitions. [2021-06-04 21:42:00,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:42:00,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:00,412 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:00,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:00,614 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:00,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:00,615 INFO L82 PathProgramCache]: Analyzing trace with hash 834350121, now seen corresponding path program 61 times [2021-06-04 21:42:00,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:00,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980012069] [2021-06-04 21:42:00,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:00,769 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:00,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:00,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980012069] [2021-06-04 21:42:00,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980012069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:00,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133856170] [2021-06-04 21:42:00,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:00,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:42:00,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:01,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133856170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:01,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:01,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-04 21:42:01,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935082789] [2021-06-04 21:42:01,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-04 21:42:01,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:01,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-04 21:42:01,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-04 21:42:01,005 INFO L87 Difference]: Start difference. First operand 1924 states and 5256 transitions. Second operand has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:01,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:01,315 INFO L93 Difference]: Finished difference Result 2864 states and 7456 transitions. [2021-06-04 21:42:01,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:42:01,315 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-04 21:42:01,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:01,318 INFO L225 Difference]: With dead ends: 2864 [2021-06-04 21:42:01,318 INFO L226 Difference]: Without dead ends: 2530 [2021-06-04 21:42:01,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 347.0ms TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:42:01,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-06-04 21:42:01,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2009. [2021-06-04 21:42:01,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 2.702191235059761) internal successors, (5426), 2008 states have internal predecessors, (5426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:01,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 5426 transitions. [2021-06-04 21:42:01,336 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 5426 transitions. Word has length 90 [2021-06-04 21:42:01,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:01,340 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 5426 transitions. [2021-06-04 21:42:01,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:01,341 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 5426 transitions. [2021-06-04 21:42:01,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:42:01,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:01,344 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:01,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-04 21:42:01,566 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:01,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:01,566 INFO L82 PathProgramCache]: Analyzing trace with hash -207325971, now seen corresponding path program 62 times [2021-06-04 21:42:01,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:01,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106407792] [2021-06-04 21:42:01,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:01,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:01,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106407792] [2021-06-04 21:42:01,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106407792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:01,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588693068] [2021-06-04 21:42:01,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:01,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:01,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:01,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:42:01,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:01,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588693068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:01,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:01,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-04 21:42:01,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071209188] [2021-06-04 21:42:01,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:42:01,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:01,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:42:01,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:42:01,890 INFO L87 Difference]: Start difference. First operand 2009 states and 5426 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:02,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:02,134 INFO L93 Difference]: Finished difference Result 3386 states and 8437 transitions. [2021-06-04 21:42:02,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:42:02,134 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-04 21:42:02,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:02,137 INFO L225 Difference]: With dead ends: 3386 [2021-06-04 21:42:02,137 INFO L226 Difference]: Without dead ends: 3116 [2021-06-04 21:42:02,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 270.9ms TimeCoverageRelationStatistics Valid=260, Invalid=732, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:42:02,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2021-06-04 21:42:02,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 2153. [2021-06-04 21:42:02,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 2.715148698884758) internal successors, (5843), 2152 states have internal predecessors, (5843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:02,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 5843 transitions. [2021-06-04 21:42:02,158 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 5843 transitions. Word has length 90 [2021-06-04 21:42:02,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:02,158 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 5843 transitions. [2021-06-04 21:42:02,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:02,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 5843 transitions. [2021-06-04 21:42:02,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:42:02,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:02,160 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:02,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-04 21:42:02,361 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:02,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:02,361 INFO L82 PathProgramCache]: Analyzing trace with hash -452403267, now seen corresponding path program 63 times [2021-06-04 21:42:02,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:02,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199869369] [2021-06-04 21:42:02,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:02,533 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:02,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:02,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199869369] [2021-06-04 21:42:02,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199869369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:02,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074845925] [2021-06-04 21:42:02,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:02,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-04 21:42:02,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:02,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:42:02,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:02,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074845925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:02,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:02,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-04 21:42:02,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054436257] [2021-06-04 21:42:02,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:02,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:02,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:02,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:02,779 INFO L87 Difference]: Start difference. First operand 2153 states and 5843 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:03,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:03,078 INFO L93 Difference]: Finished difference Result 3346 states and 8432 transitions. [2021-06-04 21:42:03,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:42:03,078 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-04 21:42:03,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:03,081 INFO L225 Difference]: With dead ends: 3346 [2021-06-04 21:42:03,081 INFO L226 Difference]: Without dead ends: 3076 [2021-06-04 21:42:03,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 333.9ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:42:03,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2021-06-04 21:42:03,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 2228. [2021-06-04 21:42:03,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2227 states have (on average 2.724741805118994) internal successors, (6068), 2227 states have internal predecessors, (6068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:03,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 6068 transitions. [2021-06-04 21:42:03,102 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 6068 transitions. Word has length 90 [2021-06-04 21:42:03,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:03,102 INFO L482 AbstractCegarLoop]: Abstraction has 2228 states and 6068 transitions. [2021-06-04 21:42:03,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:03,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 6068 transitions. [2021-06-04 21:42:03,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:42:03,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:03,104 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:03,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:03,309 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:03,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:03,309 INFO L82 PathProgramCache]: Analyzing trace with hash -829253589, now seen corresponding path program 64 times [2021-06-04 21:42:03,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:03,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467844424] [2021-06-04 21:42:03,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:03,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:03,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467844424] [2021-06-04 21:42:03,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467844424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:03,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969551279] [2021-06-04 21:42:03,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:03,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:42:03,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:03,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:42:03,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:03,600 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:03,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969551279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:03,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:03,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-04 21:42:03,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134106289] [2021-06-04 21:42:03,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:42:03,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:03,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:42:03,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:42:03,601 INFO L87 Difference]: Start difference. First operand 2228 states and 6068 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:03,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:03,877 INFO L93 Difference]: Finished difference Result 3396 states and 8607 transitions. [2021-06-04 21:42:03,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-04 21:42:03,878 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-04 21:42:03,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:03,881 INFO L225 Difference]: With dead ends: 3396 [2021-06-04 21:42:03,881 INFO L226 Difference]: Without dead ends: 3126 [2021-06-04 21:42:03,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 270.2ms TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:42:03,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-06-04 21:42:03,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2303. [2021-06-04 21:42:03,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2302 states have (on average 2.7337098175499563) internal successors, (6293), 2302 states have internal predecessors, (6293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:03,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 6293 transitions. [2021-06-04 21:42:03,903 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 6293 transitions. Word has length 90 [2021-06-04 21:42:03,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:03,904 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 6293 transitions. [2021-06-04 21:42:03,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:03,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 6293 transitions. [2021-06-04 21:42:03,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:42:03,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:03,911 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:04,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:04,129 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:04,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:04,129 INFO L82 PathProgramCache]: Analyzing trace with hash 497501947, now seen corresponding path program 65 times [2021-06-04 21:42:04,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:04,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138971430] [2021-06-04 21:42:04,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:04,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:04,251 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:04,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:04,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138971430] [2021-06-04 21:42:04,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138971430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:04,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075680693] [2021-06-04 21:42:04,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:04,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-04 21:42:04,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:04,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:42:04,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:04,432 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:04,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075680693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:04,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:04,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-04 21:42:04,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764958028] [2021-06-04 21:42:04,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:04,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:04,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:04,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:04,433 INFO L87 Difference]: Start difference. First operand 2303 states and 6293 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:04,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:04,794 INFO L93 Difference]: Finished difference Result 3421 states and 8732 transitions. [2021-06-04 21:42:04,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:42:04,795 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-04 21:42:04,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:04,798 INFO L225 Difference]: With dead ends: 3421 [2021-06-04 21:42:04,798 INFO L226 Difference]: Without dead ends: 3151 [2021-06-04 21:42:04,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 355.5ms TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:42:04,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-04 21:42:04,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2378. [2021-06-04 21:42:04,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.7421119057635677) internal successors, (6518), 2377 states have internal predecessors, (6518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:04,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6518 transitions. [2021-06-04 21:42:04,822 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6518 transitions. Word has length 90 [2021-06-04 21:42:04,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:04,822 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6518 transitions. [2021-06-04 21:42:04,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:04,822 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6518 transitions. [2021-06-04 21:42:04,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:42:04,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:04,824 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:05,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-04 21:42:05,029 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:05,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:05,029 INFO L82 PathProgramCache]: Analyzing trace with hash 951718121, now seen corresponding path program 66 times [2021-06-04 21:42:05,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:05,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187411983] [2021-06-04 21:42:05,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:05,151 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:05,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:05,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187411983] [2021-06-04 21:42:05,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187411983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:05,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981356260] [2021-06-04 21:42:05,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:05,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-04 21:42:05,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:05,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:42:05,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:05,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981356260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:05,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:05,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-04 21:42:05,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541149052] [2021-06-04 21:42:05,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:42:05,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:05,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:42:05,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:42:05,319 INFO L87 Difference]: Start difference. First operand 2378 states and 6518 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:05,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:05,615 INFO L93 Difference]: Finished difference Result 3446 states and 8857 transitions. [2021-06-04 21:42:05,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-04 21:42:05,616 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-04 21:42:05,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:05,619 INFO L225 Difference]: With dead ends: 3446 [2021-06-04 21:42:05,619 INFO L226 Difference]: Without dead ends: 3176 [2021-06-04 21:42:05,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 284.3ms TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:42:05,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-04 21:42:05,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2453. [2021-06-04 21:42:05,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2452 states have (on average 2.75) internal successors, (6743), 2452 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:05,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 6743 transitions. [2021-06-04 21:42:05,644 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 6743 transitions. Word has length 90 [2021-06-04 21:42:05,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:05,644 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 6743 transitions. [2021-06-04 21:42:05,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:05,645 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 6743 transitions. [2021-06-04 21:42:05,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:42:05,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:05,646 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:05,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:05,847 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:05,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:05,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1950614457, now seen corresponding path program 67 times [2021-06-04 21:42:05,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:05,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685981842] [2021-06-04 21:42:05,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:05,987 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:05,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:05,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685981842] [2021-06-04 21:42:05,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685981842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:05,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120152269] [2021-06-04 21:42:05,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:06,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:42:06,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:06,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120152269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:06,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:06,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-04 21:42:06,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066109646] [2021-06-04 21:42:06,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:06,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:06,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:06,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:06,190 INFO L87 Difference]: Start difference. First operand 2453 states and 6743 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:06,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:06,583 INFO L93 Difference]: Finished difference Result 3471 states and 8982 transitions. [2021-06-04 21:42:06,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:42:06,583 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-04 21:42:06,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:06,586 INFO L225 Difference]: With dead ends: 3471 [2021-06-04 21:42:06,586 INFO L226 Difference]: Without dead ends: 3201 [2021-06-04 21:42:06,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 390.5ms TimeCoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2021-06-04 21:42:06,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2021-06-04 21:42:06,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 2528. [2021-06-04 21:42:06,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2527 states have (on average 2.7574198654531066) internal successors, (6968), 2527 states have internal predecessors, (6968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:06,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 6968 transitions. [2021-06-04 21:42:06,610 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 6968 transitions. Word has length 90 [2021-06-04 21:42:06,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:06,611 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 6968 transitions. [2021-06-04 21:42:06,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:06,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 6968 transitions. [2021-06-04 21:42:06,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:42:06,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:06,613 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:06,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-04 21:42:06,813 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:06,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:06,813 INFO L82 PathProgramCache]: Analyzing trace with hash 71286567, now seen corresponding path program 68 times [2021-06-04 21:42:06,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:06,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585374576] [2021-06-04 21:42:06,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:06,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:06,956 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:06,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:06,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585374576] [2021-06-04 21:42:06,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585374576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:06,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957060670] [2021-06-04 21:42:06,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:07,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:07,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:07,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:42:07,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:07,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957060670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:07,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:07,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-04 21:42:07,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191765031] [2021-06-04 21:42:07,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:42:07,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:07,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:42:07,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:42:07,142 INFO L87 Difference]: Start difference. First operand 2528 states and 6968 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:07,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:07,473 INFO L93 Difference]: Finished difference Result 3496 states and 9107 transitions. [2021-06-04 21:42:07,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:42:07,474 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-04 21:42:07,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:07,477 INFO L225 Difference]: With dead ends: 3496 [2021-06-04 21:42:07,477 INFO L226 Difference]: Without dead ends: 3226 [2021-06-04 21:42:07,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 313.1ms TimeCoverageRelationStatistics Valid=347, Invalid=1059, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:42:07,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-06-04 21:42:07,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2603. [2021-06-04 21:42:07,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.764411990776326) internal successors, (7193), 2602 states have internal predecessors, (7193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:07,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7193 transitions. [2021-06-04 21:42:07,502 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7193 transitions. Word has length 90 [2021-06-04 21:42:07,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:07,502 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7193 transitions. [2021-06-04 21:42:07,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:07,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7193 transitions. [2021-06-04 21:42:07,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:42:07,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:07,505 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:07,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:07,728 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:07,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:07,728 INFO L82 PathProgramCache]: Analyzing trace with hash 2101605879, now seen corresponding path program 69 times [2021-06-04 21:42:07,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:07,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481337278] [2021-06-04 21:42:07,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:07,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:07,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481337278] [2021-06-04 21:42:07,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481337278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:07,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324733758] [2021-06-04 21:42:07,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:07,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-04 21:42:07,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:07,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:42:07,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:08,028 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:08,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324733758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:08,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:08,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-04 21:42:08,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821557118] [2021-06-04 21:42:08,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:08,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:08,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:08,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:08,029 INFO L87 Difference]: Start difference. First operand 2603 states and 7193 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:08,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:08,466 INFO L93 Difference]: Finished difference Result 3521 states and 9232 transitions. [2021-06-04 21:42:08,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:42:08,466 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-04 21:42:08,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:08,469 INFO L225 Difference]: With dead ends: 3521 [2021-06-04 21:42:08,470 INFO L226 Difference]: Without dead ends: 3251 [2021-06-04 21:42:08,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 414.4ms TimeCoverageRelationStatistics Valid=422, Invalid=1300, Unknown=0, NotChecked=0, Total=1722 [2021-06-04 21:42:08,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3251 states. [2021-06-04 21:42:08,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3251 to 2678. [2021-06-04 21:42:08,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2677 states have (on average 2.771012327231976) internal successors, (7418), 2677 states have internal predecessors, (7418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:08,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7418 transitions. [2021-06-04 21:42:08,496 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7418 transitions. Word has length 90 [2021-06-04 21:42:08,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:08,496 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7418 transitions. [2021-06-04 21:42:08,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:08,496 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7418 transitions. [2021-06-04 21:42:08,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:42:08,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:08,498 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:08,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-04 21:42:08,699 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:08,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:08,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1579121947, now seen corresponding path program 70 times [2021-06-04 21:42:08,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:08,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065351192] [2021-06-04 21:42:08,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:08,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:08,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065351192] [2021-06-04 21:42:08,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065351192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:08,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117218068] [2021-06-04 21:42:08,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:08,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:42:08,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:08,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:42:08,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:09,005 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:09,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117218068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:09,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:09,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-04 21:42:09,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835708935] [2021-06-04 21:42:09,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:42:09,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:09,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:42:09,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:42:09,006 INFO L87 Difference]: Start difference. First operand 2678 states and 7418 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:09,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:09,384 INFO L93 Difference]: Finished difference Result 3591 states and 9477 transitions. [2021-06-04 21:42:09,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-04 21:42:09,385 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-04 21:42:09,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:09,389 INFO L225 Difference]: With dead ends: 3591 [2021-06-04 21:42:09,389 INFO L226 Difference]: Without dead ends: 3321 [2021-06-04 21:42:09,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 351.4ms TimeCoverageRelationStatistics Valid=408, Invalid=1152, Unknown=0, NotChecked=0, Total=1560 [2021-06-04 21:42:09,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-06-04 21:42:09,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2753. [2021-06-04 21:42:09,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 2.782703488372093) internal successors, (7658), 2752 states have internal predecessors, (7658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:09,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7658 transitions. [2021-06-04 21:42:09,429 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7658 transitions. Word has length 90 [2021-06-04 21:42:09,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:09,429 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7658 transitions. [2021-06-04 21:42:09,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:09,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7658 transitions. [2021-06-04 21:42:09,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:42:09,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:09,432 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:09,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:09,637 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:09,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:09,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1000603061, now seen corresponding path program 71 times [2021-06-04 21:42:09,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:09,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623050456] [2021-06-04 21:42:09,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:09,743 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:09,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:09,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623050456] [2021-06-04 21:42:09,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623050456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:09,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832271125] [2021-06-04 21:42:09,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:09,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-04 21:42:09,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:09,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:42:09,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:09,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832271125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:09,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:09,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-04 21:42:09,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727809565] [2021-06-04 21:42:09,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:09,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:09,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:09,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:09,938 INFO L87 Difference]: Start difference. First operand 2753 states and 7658 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:10,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:10,473 INFO L93 Difference]: Finished difference Result 4169 states and 11103 transitions. [2021-06-04 21:42:10,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:42:10,474 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-04 21:42:10,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:10,477 INFO L225 Difference]: With dead ends: 4169 [2021-06-04 21:42:10,477 INFO L226 Difference]: Without dead ends: 3546 [2021-06-04 21:42:10,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 478.9ms TimeCoverageRelationStatistics Valid=512, Invalid=1558, Unknown=0, NotChecked=0, Total=2070 [2021-06-04 21:42:10,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2021-06-04 21:42:10,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 2828. [2021-06-04 21:42:10,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 2.790237000353732) internal successors, (7888), 2827 states have internal predecessors, (7888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:10,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7888 transitions. [2021-06-04 21:42:10,505 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7888 transitions. Word has length 90 [2021-06-04 21:42:10,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:10,505 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7888 transitions. [2021-06-04 21:42:10,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:10,505 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7888 transitions. [2021-06-04 21:42:10,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:42:10,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:10,507 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:10,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-04 21:42:10,708 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:10,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:10,708 INFO L82 PathProgramCache]: Analyzing trace with hash -32044541, now seen corresponding path program 72 times [2021-06-04 21:42:10,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:10,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97704405] [2021-06-04 21:42:10,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:10,842 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:10,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:10,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97704405] [2021-06-04 21:42:10,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97704405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:10,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851294288] [2021-06-04 21:42:10,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:10,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-04 21:42:10,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:10,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:42:10,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:11,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851294288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:11,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:11,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-04 21:42:11,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832202793] [2021-06-04 21:42:11,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:42:11,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:11,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:42:11,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:42:11,046 INFO L87 Difference]: Start difference. First operand 2828 states and 7888 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:11,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:11,466 INFO L93 Difference]: Finished difference Result 4398 states and 11821 transitions. [2021-06-04 21:42:11,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:42:11,467 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-04 21:42:11,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:11,470 INFO L225 Difference]: With dead ends: 4398 [2021-06-04 21:42:11,470 INFO L226 Difference]: Without dead ends: 4128 [2021-06-04 21:42:11,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 389.3ms TimeCoverageRelationStatistics Valid=486, Invalid=1236, Unknown=0, NotChecked=0, Total=1722 [2021-06-04 21:42:11,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2021-06-04 21:42:11,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 3008. [2021-06-04 21:42:11,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 2.809112071832391) internal successors, (8447), 3007 states have internal predecessors, (8447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:11,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 8447 transitions. [2021-06-04 21:42:11,499 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 8447 transitions. Word has length 90 [2021-06-04 21:42:11,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:11,499 INFO L482 AbstractCegarLoop]: Abstraction has 3008 states and 8447 transitions. [2021-06-04 21:42:11,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:11,499 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 8447 transitions. [2021-06-04 21:42:11,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:42:11,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:11,501 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:11,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:11,702 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:11,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:11,702 INFO L82 PathProgramCache]: Analyzing trace with hash -9701291, now seen corresponding path program 73 times [2021-06-04 21:42:11,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:11,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176476898] [2021-06-04 21:42:11,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:11,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:11,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176476898] [2021-06-04 21:42:11,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176476898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:11,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243802486] [2021-06-04 21:42:11,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:11,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:11,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:42:11,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:11,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243802486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:11,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:11,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-04 21:42:11,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447151072] [2021-06-04 21:42:11,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:11,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:11,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:11,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:11,999 INFO L87 Difference]: Start difference. First operand 3008 states and 8447 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:12,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:12,524 INFO L93 Difference]: Finished difference Result 3885 states and 10521 transitions. [2021-06-04 21:42:12,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:42:12,524 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-04 21:42:12,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:12,528 INFO L225 Difference]: With dead ends: 3885 [2021-06-04 21:42:12,528 INFO L226 Difference]: Without dead ends: 3306 [2021-06-04 21:42:12,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 481.7ms TimeCoverageRelationStatistics Valid=579, Invalid=1491, Unknown=0, NotChecked=0, Total=2070 [2021-06-04 21:42:12,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-06-04 21:42:12,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 2113. [2021-06-04 21:42:12,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 2.7357954545454546) internal successors, (5778), 2112 states have internal predecessors, (5778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:12,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 5778 transitions. [2021-06-04 21:42:12,549 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 5778 transitions. Word has length 90 [2021-06-04 21:42:12,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:12,549 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 5778 transitions. [2021-06-04 21:42:12,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:12,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 5778 transitions. [2021-06-04 21:42:12,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:42:12,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:12,551 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:12,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:12,751 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:12,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:12,751 INFO L82 PathProgramCache]: Analyzing trace with hash -567911574, now seen corresponding path program 74 times [2021-06-04 21:42:12,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:12,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987036818] [2021-06-04 21:42:12,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:12,908 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:12,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:12,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987036818] [2021-06-04 21:42:12,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987036818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:12,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847745376] [2021-06-04 21:42:12,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:12,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:12,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:12,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:42:12,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:13,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847745376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:13,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:13,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-04 21:42:13,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959320550] [2021-06-04 21:42:13,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:13,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:13,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:13,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:13,118 INFO L87 Difference]: Start difference. First operand 2113 states and 5778 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:13,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:13,437 INFO L93 Difference]: Finished difference Result 3131 states and 8017 transitions. [2021-06-04 21:42:13,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:42:13,437 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-04 21:42:13,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:13,440 INFO L225 Difference]: With dead ends: 3131 [2021-06-04 21:42:13,440 INFO L226 Difference]: Without dead ends: 2861 [2021-06-04 21:42:13,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 328.6ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:42:13,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-06-04 21:42:13,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2188. [2021-06-04 21:42:13,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2187 states have (on average 2.7448559670781894) internal successors, (6003), 2187 states have internal predecessors, (6003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:13,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 6003 transitions. [2021-06-04 21:42:13,476 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 6003 transitions. Word has length 95 [2021-06-04 21:42:13,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:13,476 INFO L482 AbstractCegarLoop]: Abstraction has 2188 states and 6003 transitions. [2021-06-04 21:42:13,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:13,476 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 6003 transitions. [2021-06-04 21:42:13,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:42:13,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:13,478 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:13,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:13,678 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:13,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:13,679 INFO L82 PathProgramCache]: Analyzing trace with hash -812988870, now seen corresponding path program 75 times [2021-06-04 21:42:13,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:13,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301684361] [2021-06-04 21:42:13,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:13,817 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:13,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:13,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301684361] [2021-06-04 21:42:13,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301684361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:13,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478002507] [2021-06-04 21:42:13,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:13,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-04 21:42:13,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:13,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:42:13,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:14,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478002507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:14,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:14,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-04 21:42:14,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602596007] [2021-06-04 21:42:14,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:42:14,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:14,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:42:14,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:42:14,009 INFO L87 Difference]: Start difference. First operand 2188 states and 6003 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:14,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:14,323 INFO L93 Difference]: Finished difference Result 3451 states and 8732 transitions. [2021-06-04 21:42:14,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:42:14,323 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-04 21:42:14,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:14,326 INFO L225 Difference]: With dead ends: 3451 [2021-06-04 21:42:14,326 INFO L226 Difference]: Without dead ends: 3181 [2021-06-04 21:42:14,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 341.6ms TimeCoverageRelationStatistics Valid=355, Invalid=1127, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:42:14,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-06-04 21:42:14,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 2263. [2021-06-04 21:42:14,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 2.753315649867374) internal successors, (6228), 2262 states have internal predecessors, (6228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:14,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6228 transitions. [2021-06-04 21:42:14,347 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6228 transitions. Word has length 95 [2021-06-04 21:42:14,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:14,347 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6228 transitions. [2021-06-04 21:42:14,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:14,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6228 transitions. [2021-06-04 21:42:14,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:42:14,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:14,349 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:14,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:14,550 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:14,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:14,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1189839192, now seen corresponding path program 76 times [2021-06-04 21:42:14,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:14,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343317418] [2021-06-04 21:42:14,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:14,690 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:14,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:14,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343317418] [2021-06-04 21:42:14,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343317418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:14,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416016529] [2021-06-04 21:42:14,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:14,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:42:14,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:14,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:42:14,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:14,863 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:14,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416016529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:14,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:14,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-04 21:42:14,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728592252] [2021-06-04 21:42:14,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:14,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:14,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:14,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:14,865 INFO L87 Difference]: Start difference. First operand 2263 states and 6228 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:15,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:15,164 INFO L93 Difference]: Finished difference Result 3481 states and 8867 transitions. [2021-06-04 21:42:15,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:42:15,164 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-04 21:42:15,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:15,167 INFO L225 Difference]: With dead ends: 3481 [2021-06-04 21:42:15,167 INFO L226 Difference]: Without dead ends: 3211 [2021-06-04 21:42:15,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 318.3ms TimeCoverageRelationStatistics Valid=361, Invalid=1121, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:42:15,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-06-04 21:42:15,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 2338. [2021-06-04 21:42:15,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2337 states have (on average 2.761232349165597) internal successors, (6453), 2337 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:15,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6453 transitions. [2021-06-04 21:42:15,190 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6453 transitions. Word has length 95 [2021-06-04 21:42:15,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:15,190 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6453 transitions. [2021-06-04 21:42:15,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:15,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6453 transitions. [2021-06-04 21:42:15,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:42:15,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:15,192 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:15,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:15,393 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:15,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:15,393 INFO L82 PathProgramCache]: Analyzing trace with hash 136916344, now seen corresponding path program 77 times [2021-06-04 21:42:15,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:15,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461157105] [2021-06-04 21:42:15,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:15,528 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:15,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:15,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461157105] [2021-06-04 21:42:15,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461157105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:15,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523959173] [2021-06-04 21:42:15,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:15,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-04 21:42:15,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:15,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:42:15,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:15,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523959173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:15,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:15,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-04 21:42:15,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235419259] [2021-06-04 21:42:15,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:42:15,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:15,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:42:15,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:42:15,727 INFO L87 Difference]: Start difference. First operand 2338 states and 6453 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:16,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:16,097 INFO L93 Difference]: Finished difference Result 3506 states and 8992 transitions. [2021-06-04 21:42:16,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:42:16,098 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-04 21:42:16,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:16,101 INFO L225 Difference]: With dead ends: 3506 [2021-06-04 21:42:16,101 INFO L226 Difference]: Without dead ends: 3236 [2021-06-04 21:42:16,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 377.0ms TimeCoverageRelationStatistics Valid=383, Invalid=1257, Unknown=0, NotChecked=0, Total=1640 [2021-06-04 21:42:16,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-06-04 21:42:16,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 2413. [2021-06-04 21:42:16,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2413 states, 2412 states have (on average 2.7686567164179103) internal successors, (6678), 2412 states have internal predecessors, (6678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:16,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6678 transitions. [2021-06-04 21:42:16,125 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6678 transitions. Word has length 95 [2021-06-04 21:42:16,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:16,125 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6678 transitions. [2021-06-04 21:42:16,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:16,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6678 transitions. [2021-06-04 21:42:16,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:42:16,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:16,127 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:16,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:16,327 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:16,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:16,328 INFO L82 PathProgramCache]: Analyzing trace with hash 591132518, now seen corresponding path program 78 times [2021-06-04 21:42:16,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:16,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537310660] [2021-06-04 21:42:16,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:16,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:16,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537310660] [2021-06-04 21:42:16,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537310660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:16,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929112521] [2021-06-04 21:42:16,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:16,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-04 21:42:16,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:16,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:42:16,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:16,634 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:16,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929112521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:16,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:16,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-04 21:42:16,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832723464] [2021-06-04 21:42:16,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:16,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:16,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:16,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:16,635 INFO L87 Difference]: Start difference. First operand 2413 states and 6678 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:16,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:16,978 INFO L93 Difference]: Finished difference Result 3531 states and 9117 transitions. [2021-06-04 21:42:16,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-04 21:42:16,978 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-04 21:42:16,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:16,981 INFO L225 Difference]: With dead ends: 3531 [2021-06-04 21:42:16,981 INFO L226 Difference]: Without dead ends: 3261 [2021-06-04 21:42:16,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 328.0ms TimeCoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2021-06-04 21:42:16,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3261 states. [2021-06-04 21:42:17,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3261 to 2488. [2021-06-04 21:42:17,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.7756332931242462) internal successors, (6903), 2487 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:17,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6903 transitions. [2021-06-04 21:42:17,005 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6903 transitions. Word has length 95 [2021-06-04 21:42:17,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:17,005 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6903 transitions. [2021-06-04 21:42:17,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:17,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6903 transitions. [2021-06-04 21:42:17,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:42:17,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:17,007 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:17,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:17,208 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:17,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:17,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1590028854, now seen corresponding path program 79 times [2021-06-04 21:42:17,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:17,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448505694] [2021-06-04 21:42:17,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:17,349 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:17,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:17,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448505694] [2021-06-04 21:42:17,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448505694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:17,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640837849] [2021-06-04 21:42:17,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:17,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:17,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:42:17,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:17,570 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:17,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640837849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:17,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:17,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-04 21:42:17,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897496427] [2021-06-04 21:42:17,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:42:17,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:17,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:42:17,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:42:17,571 INFO L87 Difference]: Start difference. First operand 2488 states and 6903 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:18,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:18,015 INFO L93 Difference]: Finished difference Result 3556 states and 9242 transitions. [2021-06-04 21:42:18,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:42:18,015 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-04 21:42:18,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:18,018 INFO L225 Difference]: With dead ends: 3556 [2021-06-04 21:42:18,018 INFO L226 Difference]: Without dead ends: 3286 [2021-06-04 21:42:18,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 435.6ms TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-06-04 21:42:18,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-06-04 21:42:18,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 2563. [2021-06-04 21:42:18,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 2.782201405152225) internal successors, (7128), 2562 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:18,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7128 transitions. [2021-06-04 21:42:18,043 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7128 transitions. Word has length 95 [2021-06-04 21:42:18,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:18,043 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7128 transitions. [2021-06-04 21:42:18,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:18,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7128 transitions. [2021-06-04 21:42:18,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:42:18,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:18,045 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:18,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-04 21:42:18,246 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:18,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:18,246 INFO L82 PathProgramCache]: Analyzing trace with hash -289299036, now seen corresponding path program 80 times [2021-06-04 21:42:18,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:18,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146530340] [2021-06-04 21:42:18,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:18,377 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:18,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:18,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146530340] [2021-06-04 21:42:18,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146530340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:18,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049872738] [2021-06-04 21:42:18,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:18,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:18,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:18,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:42:18,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:18,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049872738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:18,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:18,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-04 21:42:18,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167101793] [2021-06-04 21:42:18,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:18,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:18,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:18,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:18,576 INFO L87 Difference]: Start difference. First operand 2563 states and 7128 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:18,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:18,946 INFO L93 Difference]: Finished difference Result 3581 states and 9367 transitions. [2021-06-04 21:42:18,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:42:18,946 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-04 21:42:18,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:18,949 INFO L225 Difference]: With dead ends: 3581 [2021-06-04 21:42:18,949 INFO L226 Difference]: Without dead ends: 3311 [2021-06-04 21:42:18,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 350.7ms TimeCoverageRelationStatistics Valid=461, Invalid=1345, Unknown=0, NotChecked=0, Total=1806 [2021-06-04 21:42:18,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2021-06-04 21:42:18,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 2638. [2021-06-04 21:42:18,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 2637 states have (on average 2.78839590443686) internal successors, (7353), 2637 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:18,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7353 transitions. [2021-06-04 21:42:18,975 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7353 transitions. Word has length 95 [2021-06-04 21:42:18,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:18,975 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7353 transitions. [2021-06-04 21:42:18,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:18,976 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7353 transitions. [2021-06-04 21:42:18,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:42:18,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:18,977 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:19,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:19,178 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:19,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:19,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1741020276, now seen corresponding path program 81 times [2021-06-04 21:42:19,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:19,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135283876] [2021-06-04 21:42:19,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:19,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:19,298 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:19,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:19,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135283876] [2021-06-04 21:42:19,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135283876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:19,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648513571] [2021-06-04 21:42:19,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:19,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-04 21:42:19,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:19,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:42:19,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:19,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648513571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:19,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:19,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-04 21:42:19,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18908387] [2021-06-04 21:42:19,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:42:19,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:19,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:42:19,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:42:19,517 INFO L87 Difference]: Start difference. First operand 2638 states and 7353 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:20,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:20,003 INFO L93 Difference]: Finished difference Result 3606 states and 9492 transitions. [2021-06-04 21:42:20,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:42:20,004 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-04 21:42:20,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:20,006 INFO L225 Difference]: With dead ends: 3606 [2021-06-04 21:42:20,006 INFO L226 Difference]: Without dead ends: 3336 [2021-06-04 21:42:20,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 456.8ms TimeCoverageRelationStatistics Valid=487, Invalid=1493, Unknown=0, NotChecked=0, Total=1980 [2021-06-04 21:42:20,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-06-04 21:42:20,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2713. [2021-06-04 21:42:20,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 2.7942477876106193) internal successors, (7578), 2712 states have internal predecessors, (7578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:20,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7578 transitions. [2021-06-04 21:42:20,032 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7578 transitions. Word has length 95 [2021-06-04 21:42:20,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:20,032 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7578 transitions. [2021-06-04 21:42:20,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:20,033 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7578 transitions. [2021-06-04 21:42:20,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:42:20,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:20,034 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:20,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-04 21:42:20,235 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:20,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:20,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1939707550, now seen corresponding path program 82 times [2021-06-04 21:42:20,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:20,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343678331] [2021-06-04 21:42:20,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:20,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:20,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343678331] [2021-06-04 21:42:20,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343678331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:20,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516026026] [2021-06-04 21:42:20,365 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:20,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:42:20,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:20,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:42:20,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:20,574 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:20,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516026026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:20,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:20,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-04 21:42:20,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397158223] [2021-06-04 21:42:20,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:20,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:20,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:20,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:20,575 INFO L87 Difference]: Start difference. First operand 2713 states and 7578 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:20,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:20,966 INFO L93 Difference]: Finished difference Result 3631 states and 9617 transitions. [2021-06-04 21:42:20,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:42:20,966 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-04 21:42:20,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:20,969 INFO L225 Difference]: With dead ends: 3631 [2021-06-04 21:42:20,969 INFO L226 Difference]: Without dead ends: 3361 [2021-06-04 21:42:20,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 378.3ms TimeCoverageRelationStatistics Valid=535, Invalid=1445, Unknown=0, NotChecked=0, Total=1980 [2021-06-04 21:42:20,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3361 states. [2021-06-04 21:42:20,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3361 to 2788. [2021-06-04 21:42:20,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.79978471474704) internal successors, (7803), 2787 states have internal predecessors, (7803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:20,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7803 transitions. [2021-06-04 21:42:20,997 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7803 transitions. Word has length 95 [2021-06-04 21:42:20,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:20,998 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7803 transitions. [2021-06-04 21:42:20,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:20,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7803 transitions. [2021-06-04 21:42:20,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:42:21,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:21,000 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:21,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:21,200 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:21,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:21,201 INFO L82 PathProgramCache]: Analyzing trace with hash 640017458, now seen corresponding path program 83 times [2021-06-04 21:42:21,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:21,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478996595] [2021-06-04 21:42:21,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:21,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:21,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:21,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478996595] [2021-06-04 21:42:21,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478996595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:21,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637148138] [2021-06-04 21:42:21,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:21,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-04 21:42:21,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:21,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:42:21,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:21,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637148138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:21,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:21,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-04 21:42:21,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405213927] [2021-06-04 21:42:21,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:42:21,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:21,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:42:21,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:42:21,539 INFO L87 Difference]: Start difference. First operand 2788 states and 7803 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:22,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:22,073 INFO L93 Difference]: Finished difference Result 3716 states and 9907 transitions. [2021-06-04 21:42:22,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:42:22,074 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-04 21:42:22,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:22,077 INFO L225 Difference]: With dead ends: 3716 [2021-06-04 21:42:22,077 INFO L226 Difference]: Without dead ends: 3446 [2021-06-04 21:42:22,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 493.9ms TimeCoverageRelationStatistics Valid=563, Invalid=1599, Unknown=0, NotChecked=0, Total=2162 [2021-06-04 21:42:22,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-06-04 21:42:22,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2863. [2021-06-04 21:42:22,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.8120195667365477) internal successors, (8048), 2862 states have internal predecessors, (8048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:22,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 8048 transitions. [2021-06-04 21:42:22,120 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 8048 transitions. Word has length 95 [2021-06-04 21:42:22,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:22,120 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 8048 transitions. [2021-06-04 21:42:22,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:22,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 8048 transitions. [2021-06-04 21:42:22,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:42:22,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:22,122 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:22,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:22,325 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:22,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:22,325 INFO L82 PathProgramCache]: Analyzing trace with hash -392630144, now seen corresponding path program 84 times [2021-06-04 21:42:22,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:22,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206208766] [2021-06-04 21:42:22,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:22,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:22,451 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:22,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:22,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206208766] [2021-06-04 21:42:22,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206208766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:22,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061386078] [2021-06-04 21:42:22,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:22,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-04 21:42:22,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:22,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:42:22,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:22,618 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:22,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061386078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:22,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:22,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-04 21:42:22,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097584522] [2021-06-04 21:42:22,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:22,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:22,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:22,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:22,619 INFO L87 Difference]: Start difference. First operand 2863 states and 8048 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:23,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:23,051 INFO L93 Difference]: Finished difference Result 4458 states and 12031 transitions. [2021-06-04 21:42:23,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:42:23,051 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-04 21:42:23,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:23,055 INFO L225 Difference]: With dead ends: 4458 [2021-06-04 21:42:23,055 INFO L226 Difference]: Without dead ends: 4188 [2021-06-04 21:42:23,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 401.0ms TimeCoverageRelationStatistics Valid=626, Invalid=1536, Unknown=0, NotChecked=0, Total=2162 [2021-06-04 21:42:23,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2021-06-04 21:42:23,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 3043. [2021-06-04 21:42:23,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3043 states, 3042 states have (on average 2.829388560157791) internal successors, (8607), 3042 states have internal predecessors, (8607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:23,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 8607 transitions. [2021-06-04 21:42:23,086 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 8607 transitions. Word has length 95 [2021-06-04 21:42:23,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:23,086 INFO L482 AbstractCegarLoop]: Abstraction has 3043 states and 8607 transitions. [2021-06-04 21:42:23,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:23,086 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 8607 transitions. [2021-06-04 21:42:23,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:42:23,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:23,088 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:23,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:23,289 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:23,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:23,289 INFO L82 PathProgramCache]: Analyzing trace with hash -370286894, now seen corresponding path program 85 times [2021-06-04 21:42:23,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:23,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498644448] [2021-06-04 21:42:23,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:23,397 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:23,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:23,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498644448] [2021-06-04 21:42:23,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498644448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:23,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101633395] [2021-06-04 21:42:23,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:23,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:42:23,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:23,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101633395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:23,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:23,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-04 21:42:23,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996494556] [2021-06-04 21:42:23,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:42:23,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:23,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:42:23,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:42:23,599 INFO L87 Difference]: Start difference. First operand 3043 states and 8607 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:24,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:24,137 INFO L93 Difference]: Finished difference Result 3920 states and 10681 transitions. [2021-06-04 21:42:24,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:42:24,137 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-04 21:42:24,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:24,140 INFO L225 Difference]: With dead ends: 3920 [2021-06-04 21:42:24,140 INFO L226 Difference]: Without dead ends: 3431 [2021-06-04 21:42:24,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 499.0ms TimeCoverageRelationStatistics Valid=658, Invalid=1694, Unknown=0, NotChecked=0, Total=2352 [2021-06-04 21:42:24,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2021-06-04 21:42:24,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 2034. [2021-06-04 21:42:24,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 2.73782587309395) internal successors, (5566), 2033 states have internal predecessors, (5566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:24,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5566 transitions. [2021-06-04 21:42:24,161 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5566 transitions. Word has length 95 [2021-06-04 21:42:24,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:24,161 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 5566 transitions. [2021-06-04 21:42:24,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:24,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5566 transitions. [2021-06-04 21:42:24,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:24,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:24,163 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:24,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:24,363 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:24,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:24,363 INFO L82 PathProgramCache]: Analyzing trace with hash -2121147398, now seen corresponding path program 86 times [2021-06-04 21:42:24,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:24,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17473220] [2021-06-04 21:42:24,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:24,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:24,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:24,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17473220] [2021-06-04 21:42:24,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17473220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:24,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960065789] [2021-06-04 21:42:24,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:24,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:24,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:24,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:24,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:24,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960065789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:24,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:24,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-04 21:42:24,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401308651] [2021-06-04 21:42:24,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:42:24,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:24,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:42:24,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:42:24,782 INFO L87 Difference]: Start difference. First operand 2034 states and 5566 transitions. Second operand has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 22 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:25,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:25,137 INFO L93 Difference]: Finished difference Result 3024 states and 7866 transitions. [2021-06-04 21:42:25,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:42:25,138 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 22 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:42:25,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:25,140 INFO L225 Difference]: With dead ends: 3024 [2021-06-04 21:42:25,140 INFO L226 Difference]: Without dead ends: 2690 [2021-06-04 21:42:25,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 386.1ms TimeCoverageRelationStatistics Valid=445, Invalid=1277, Unknown=0, NotChecked=0, Total=1722 [2021-06-04 21:42:25,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2021-06-04 21:42:25,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2119. [2021-06-04 21:42:25,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 2.7082152974504248) internal successors, (5736), 2118 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:25,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 5736 transitions. [2021-06-04 21:42:25,161 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 5736 transitions. Word has length 100 [2021-06-04 21:42:25,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:25,161 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 5736 transitions. [2021-06-04 21:42:25,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 22 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:25,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 5736 transitions. [2021-06-04 21:42:25,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:25,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:25,163 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:25,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:25,364 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:25,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:25,364 INFO L82 PathProgramCache]: Analyzing trace with hash 93978558, now seen corresponding path program 87 times [2021-06-04 21:42:25,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:25,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793955068] [2021-06-04 21:42:25,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:25,533 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:25,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:25,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793955068] [2021-06-04 21:42:25,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793955068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:25,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065676003] [2021-06-04 21:42:25,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:25,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-04 21:42:25,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:25,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:25,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:25,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065676003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:25,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:25,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-04 21:42:25,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413828892] [2021-06-04 21:42:25,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:42:25,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:25,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:42:25,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:42:25,729 INFO L87 Difference]: Start difference. First operand 2119 states and 5736 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:25,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:25,983 INFO L93 Difference]: Finished difference Result 3646 states and 9047 transitions. [2021-06-04 21:42:25,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-04 21:42:25,983 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:42:25,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:25,986 INFO L225 Difference]: With dead ends: 3646 [2021-06-04 21:42:25,986 INFO L226 Difference]: Without dead ends: 3376 [2021-06-04 21:42:25,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 299.7ms TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:42:25,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2021-06-04 21:42:26,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 2263. [2021-06-04 21:42:26,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 2.720159151193634) internal successors, (6153), 2262 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:26,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6153 transitions. [2021-06-04 21:42:26,008 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6153 transitions. Word has length 100 [2021-06-04 21:42:26,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:26,008 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6153 transitions. [2021-06-04 21:42:26,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:26,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6153 transitions. [2021-06-04 21:42:26,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:26,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:26,010 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:26,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:26,220 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:26,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:26,220 INFO L82 PathProgramCache]: Analyzing trace with hash 903030414, now seen corresponding path program 88 times [2021-06-04 21:42:26,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:26,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096236610] [2021-06-04 21:42:26,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:26,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:26,385 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:26,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:26,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096236610] [2021-06-04 21:42:26,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096236610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:26,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806191954] [2021-06-04 21:42:26,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:26,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:42:26,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:26,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:26,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:26,615 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:26,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806191954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:26,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:26,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-04 21:42:26,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195672904] [2021-06-04 21:42:26,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-04 21:42:26,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:26,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-04 21:42:26,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-04 21:42:26,616 INFO L87 Difference]: Start difference. First operand 2263 states and 6153 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:26,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:26,953 INFO L93 Difference]: Finished difference Result 3606 states and 9042 transitions. [2021-06-04 21:42:26,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:42:26,954 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:42:26,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:26,958 INFO L225 Difference]: With dead ends: 3606 [2021-06-04 21:42:26,958 INFO L226 Difference]: Without dead ends: 3336 [2021-06-04 21:42:26,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 381.4ms TimeCoverageRelationStatistics Valid=389, Invalid=1171, Unknown=0, NotChecked=0, Total=1560 [2021-06-04 21:42:26,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-06-04 21:42:26,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2338. [2021-06-04 21:42:26,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2337 states have (on average 2.729139922978177) internal successors, (6378), 2337 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:26,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6378 transitions. [2021-06-04 21:42:26,990 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6378 transitions. Word has length 100 [2021-06-04 21:42:26,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:26,990 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6378 transitions. [2021-06-04 21:42:26,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:26,990 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6378 transitions. [2021-06-04 21:42:26,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:26,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:26,992 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:27,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-04 21:42:27,192 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:27,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:27,192 INFO L82 PathProgramCache]: Analyzing trace with hash -488919684, now seen corresponding path program 89 times [2021-06-04 21:42:27,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:27,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501922884] [2021-06-04 21:42:27,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:27,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:27,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501922884] [2021-06-04 21:42:27,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501922884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:27,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678703963] [2021-06-04 21:42:27,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:27,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-04 21:42:27,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:27,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:27,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:27,531 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:27,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678703963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:27,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:27,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-04 21:42:27,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291912252] [2021-06-04 21:42:27,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:42:27,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:27,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:42:27,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:42:27,532 INFO L87 Difference]: Start difference. First operand 2338 states and 6378 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:27,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:27,828 INFO L93 Difference]: Finished difference Result 3656 states and 9217 transitions. [2021-06-04 21:42:27,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-04 21:42:27,829 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:42:27,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:27,832 INFO L225 Difference]: With dead ends: 3656 [2021-06-04 21:42:27,832 INFO L226 Difference]: Without dead ends: 3386 [2021-06-04 21:42:27,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 314.4ms TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:42:27,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-06-04 21:42:27,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 2413. [2021-06-04 21:42:27,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2413 states, 2412 states have (on average 2.737562189054726) internal successors, (6603), 2412 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:27,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6603 transitions. [2021-06-04 21:42:27,856 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6603 transitions. Word has length 100 [2021-06-04 21:42:27,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:27,856 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6603 transitions. [2021-06-04 21:42:27,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:27,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6603 transitions. [2021-06-04 21:42:27,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:27,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:27,858 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:28,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:28,058 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:28,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:28,059 INFO L82 PathProgramCache]: Analyzing trace with hash -733996980, now seen corresponding path program 90 times [2021-06-04 21:42:28,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:28,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22322899] [2021-06-04 21:42:28,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:28,226 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:28,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:28,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22322899] [2021-06-04 21:42:28,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22322899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:28,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230089469] [2021-06-04 21:42:28,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:28,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-04 21:42:28,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:28,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:28,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:28,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230089469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:28,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:28,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-04 21:42:28,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220619624] [2021-06-04 21:42:28,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-04 21:42:28,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:28,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-04 21:42:28,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-04 21:42:28,443 INFO L87 Difference]: Start difference. First operand 2413 states and 6603 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:28,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:28,828 INFO L93 Difference]: Finished difference Result 3681 states and 9342 transitions. [2021-06-04 21:42:28,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:42:28,829 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:42:28,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:28,832 INFO L225 Difference]: With dead ends: 3681 [2021-06-04 21:42:28,832 INFO L226 Difference]: Without dead ends: 3411 [2021-06-04 21:42:28,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 420.8ms TimeCoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2021-06-04 21:42:28,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2021-06-04 21:42:28,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 2488. [2021-06-04 21:42:28,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.7454764776839564) internal successors, (6828), 2487 states have internal predecessors, (6828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:28,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6828 transitions. [2021-06-04 21:42:28,856 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6828 transitions. Word has length 100 [2021-06-04 21:42:28,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:28,856 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6828 transitions. [2021-06-04 21:42:28,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:28,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6828 transitions. [2021-06-04 21:42:28,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:28,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:28,858 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:29,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-04 21:42:29,058 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:29,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:29,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1110847302, now seen corresponding path program 91 times [2021-06-04 21:42:29,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:29,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150964713] [2021-06-04 21:42:29,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:29,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:29,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150964713] [2021-06-04 21:42:29,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150964713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:29,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805950345] [2021-06-04 21:42:29,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:29,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:29,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:29,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:29,383 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:29,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805950345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:29,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:29,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-04 21:42:29,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654889008] [2021-06-04 21:42:29,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:42:29,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:29,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:42:29,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:42:29,384 INFO L87 Difference]: Start difference. First operand 2488 states and 6828 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:29,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:29,721 INFO L93 Difference]: Finished difference Result 3706 states and 9467 transitions. [2021-06-04 21:42:29,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:42:29,722 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:42:29,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:29,725 INFO L225 Difference]: With dead ends: 3706 [2021-06-04 21:42:29,725 INFO L226 Difference]: Without dead ends: 3436 [2021-06-04 21:42:29,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 332.3ms TimeCoverageRelationStatistics Valid=372, Invalid=1188, Unknown=0, NotChecked=0, Total=1560 [2021-06-04 21:42:29,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2021-06-04 21:42:29,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 2563. [2021-06-04 21:42:29,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 2.752927400468384) internal successors, (7053), 2562 states have internal predecessors, (7053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:29,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7053 transitions. [2021-06-04 21:42:29,751 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7053 transitions. Word has length 100 [2021-06-04 21:42:29,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:29,751 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7053 transitions. [2021-06-04 21:42:29,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:29,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7053 transitions. [2021-06-04 21:42:29,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:29,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:29,753 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:29,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:29,954 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:29,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:29,954 INFO L82 PathProgramCache]: Analyzing trace with hash 215908234, now seen corresponding path program 92 times [2021-06-04 21:42:29,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:29,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465875563] [2021-06-04 21:42:29,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:29,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:30,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:30,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465875563] [2021-06-04 21:42:30,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465875563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:30,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114008632] [2021-06-04 21:42:30,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:30,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:30,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:30,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:30,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:30,326 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:30,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114008632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:30,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:30,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-04 21:42:30,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537537660] [2021-06-04 21:42:30,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-04 21:42:30,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:30,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-04 21:42:30,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-04 21:42:30,327 INFO L87 Difference]: Start difference. First operand 2563 states and 7053 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:30,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:30,782 INFO L93 Difference]: Finished difference Result 3731 states and 9592 transitions. [2021-06-04 21:42:30,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:42:30,782 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:42:30,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:30,785 INFO L225 Difference]: With dead ends: 3731 [2021-06-04 21:42:30,785 INFO L226 Difference]: Without dead ends: 3461 [2021-06-04 21:42:30,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 449.8ms TimeCoverageRelationStatistics Valid=443, Invalid=1449, Unknown=0, NotChecked=0, Total=1892 [2021-06-04 21:42:30,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3461 states. [2021-06-04 21:42:30,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3461 to 2638. [2021-06-04 21:42:30,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 2637 states have (on average 2.7599544937428897) internal successors, (7278), 2637 states have internal predecessors, (7278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:30,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7278 transitions. [2021-06-04 21:42:30,810 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7278 transitions. Word has length 100 [2021-06-04 21:42:30,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:30,810 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7278 transitions. [2021-06-04 21:42:30,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:30,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7278 transitions. [2021-06-04 21:42:30,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:30,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:30,812 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:31,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-04 21:42:31,013 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:31,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:31,013 INFO L82 PathProgramCache]: Analyzing trace with hash 670124408, now seen corresponding path program 93 times [2021-06-04 21:42:31,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:31,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172031798] [2021-06-04 21:42:31,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:31,143 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:31,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:31,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172031798] [2021-06-04 21:42:31,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172031798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:31,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509604552] [2021-06-04 21:42:31,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:31,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-04 21:42:31,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:31,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:31,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:31,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509604552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:31,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:31,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-04 21:42:31,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219110362] [2021-06-04 21:42:31,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:42:31,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:31,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:42:31,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:42:31,348 INFO L87 Difference]: Start difference. First operand 2638 states and 7278 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:31,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:31,725 INFO L93 Difference]: Finished difference Result 3756 states and 9717 transitions. [2021-06-04 21:42:31,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-04 21:42:31,725 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:42:31,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:31,729 INFO L225 Difference]: With dead ends: 3756 [2021-06-04 21:42:31,729 INFO L226 Difference]: Without dead ends: 3486 [2021-06-04 21:42:31,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 366.1ms TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2021-06-04 21:42:31,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3486 states. [2021-06-04 21:42:31,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3486 to 2713. [2021-06-04 21:42:31,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 2.7665929203539825) internal successors, (7503), 2712 states have internal predecessors, (7503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:31,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7503 transitions. [2021-06-04 21:42:31,758 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7503 transitions. Word has length 100 [2021-06-04 21:42:31,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:31,758 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7503 transitions. [2021-06-04 21:42:31,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:31,758 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7503 transitions. [2021-06-04 21:42:31,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:31,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:31,760 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:31,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-04 21:42:31,961 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:31,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:31,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1669020744, now seen corresponding path program 94 times [2021-06-04 21:42:31,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:31,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903443168] [2021-06-04 21:42:31,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:31,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:32,103 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:32,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:32,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903443168] [2021-06-04 21:42:32,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903443168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:32,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526427111] [2021-06-04 21:42:32,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:32,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:42:32,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:32,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:32,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:32,313 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:32,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526427111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:32,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:32,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-04 21:42:32,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769704854] [2021-06-04 21:42:32,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-04 21:42:32,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:32,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-04 21:42:32,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-04 21:42:32,315 INFO L87 Difference]: Start difference. First operand 2713 states and 7503 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:32,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:32,807 INFO L93 Difference]: Finished difference Result 3781 states and 9842 transitions. [2021-06-04 21:42:32,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:42:32,807 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:42:32,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:32,811 INFO L225 Difference]: With dead ends: 3781 [2021-06-04 21:42:32,811 INFO L226 Difference]: Without dead ends: 3511 [2021-06-04 21:42:32,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 480.4ms TimeCoverageRelationStatistics Valid=494, Invalid=1576, Unknown=0, NotChecked=0, Total=2070 [2021-06-04 21:42:32,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2021-06-04 21:42:32,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2788. [2021-06-04 21:42:32,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.772874058127018) internal successors, (7728), 2787 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:32,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7728 transitions. [2021-06-04 21:42:32,856 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7728 transitions. Word has length 100 [2021-06-04 21:42:32,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:32,857 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7728 transitions. [2021-06-04 21:42:32,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:32,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7728 transitions. [2021-06-04 21:42:32,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:32,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:32,859 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:33,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-04 21:42:33,059 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:33,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:33,059 INFO L82 PathProgramCache]: Analyzing trace with hash -210307146, now seen corresponding path program 95 times [2021-06-04 21:42:33,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:33,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842961499] [2021-06-04 21:42:33,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:33,188 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:33,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:33,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842961499] [2021-06-04 21:42:33,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842961499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:33,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157426041] [2021-06-04 21:42:33,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:33,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-04 21:42:33,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:33,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:33,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:33,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157426041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:33,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:33,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-04 21:42:33,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540041130] [2021-06-04 21:42:33,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:42:33,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:33,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:42:33,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:42:33,366 INFO L87 Difference]: Start difference. First operand 2788 states and 7728 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:33,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:33,771 INFO L93 Difference]: Finished difference Result 3806 states and 9967 transitions. [2021-06-04 21:42:33,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:42:33,771 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:42:33,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:33,774 INFO L225 Difference]: With dead ends: 3806 [2021-06-04 21:42:33,774 INFO L226 Difference]: Without dead ends: 3536 [2021-06-04 21:42:33,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 381.5ms TimeCoverageRelationStatistics Valid=474, Invalid=1418, Unknown=0, NotChecked=0, Total=1892 [2021-06-04 21:42:33,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3536 states. [2021-06-04 21:42:33,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3536 to 2863. [2021-06-04 21:42:33,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.7788259958071277) internal successors, (7953), 2862 states have internal predecessors, (7953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:33,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7953 transitions. [2021-06-04 21:42:33,806 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7953 transitions. Word has length 100 [2021-06-04 21:42:33,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:33,806 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7953 transitions. [2021-06-04 21:42:33,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:33,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7953 transitions. [2021-06-04 21:42:33,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:33,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:33,809 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:34,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:34,013 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:34,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:34,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1820012166, now seen corresponding path program 96 times [2021-06-04 21:42:34,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:34,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607119168] [2021-06-04 21:42:34,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:34,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:34,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:34,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607119168] [2021-06-04 21:42:34,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607119168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:34,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022629888] [2021-06-04 21:42:34,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:34,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-04 21:42:34,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:34,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:34,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:34,336 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:34,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022629888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:34,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:34,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-04 21:42:34,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557411101] [2021-06-04 21:42:34,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-04 21:42:34,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:34,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-04 21:42:34,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-04 21:42:34,337 INFO L87 Difference]: Start difference. First operand 2863 states and 7953 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:34,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:34,873 INFO L93 Difference]: Finished difference Result 3831 states and 10092 transitions. [2021-06-04 21:42:34,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:42:34,874 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:42:34,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:34,877 INFO L225 Difference]: With dead ends: 3831 [2021-06-04 21:42:34,877 INFO L226 Difference]: Without dead ends: 3561 [2021-06-04 21:42:34,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 506.9ms TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2021-06-04 21:42:34,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-06-04 21:42:34,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2938. [2021-06-04 21:42:34,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 2.7844739530132787) internal successors, (8178), 2937 states have internal predecessors, (8178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:34,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8178 transitions. [2021-06-04 21:42:34,922 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8178 transitions. Word has length 100 [2021-06-04 21:42:34,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:34,922 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8178 transitions. [2021-06-04 21:42:34,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:34,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8178 transitions. [2021-06-04 21:42:34,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:34,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:34,924 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:35,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-04 21:42:35,125 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:35,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:35,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1860715660, now seen corresponding path program 97 times [2021-06-04 21:42:35,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:35,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171296395] [2021-06-04 21:42:35,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:35,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:35,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:35,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171296395] [2021-06-04 21:42:35,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171296395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:35,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323072719] [2021-06-04 21:42:35,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:35,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:35,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:35,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323072719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:35,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:35,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-04 21:42:35,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365052066] [2021-06-04 21:42:35,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:42:35,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:35,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:42:35,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:42:35,466 INFO L87 Difference]: Start difference. First operand 2938 states and 8178 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:35,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:35,916 INFO L93 Difference]: Finished difference Result 3856 states and 10217 transitions. [2021-06-04 21:42:35,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:42:35,917 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:42:35,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:35,920 INFO L225 Difference]: With dead ends: 3856 [2021-06-04 21:42:35,920 INFO L226 Difference]: Without dead ends: 3586 [2021-06-04 21:42:35,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 424.2ms TimeCoverageRelationStatistics Valid=549, Invalid=1521, Unknown=0, NotChecked=0, Total=2070 [2021-06-04 21:42:35,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-06-04 21:42:35,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 3013. [2021-06-04 21:42:35,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 3012 states have (on average 2.789840637450199) internal successors, (8403), 3012 states have internal predecessors, (8403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:35,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8403 transitions. [2021-06-04 21:42:35,950 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8403 transitions. Word has length 100 [2021-06-04 21:42:35,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:35,950 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8403 transitions. [2021-06-04 21:42:35,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:35,950 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8403 transitions. [2021-06-04 21:42:35,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:35,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:35,953 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:36,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:36,155 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:36,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:36,155 INFO L82 PathProgramCache]: Analyzing trace with hash 719009348, now seen corresponding path program 98 times [2021-06-04 21:42:36,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:36,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36830198] [2021-06-04 21:42:36,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:36,293 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:36,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:36,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36830198] [2021-06-04 21:42:36,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36830198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:36,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588022092] [2021-06-04 21:42:36,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:36,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:36,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:36,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:36,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:36,510 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:36,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588022092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:36,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:36,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-04 21:42:36,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839249605] [2021-06-04 21:42:36,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-04 21:42:36,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:36,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-04 21:42:36,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-04 21:42:36,511 INFO L87 Difference]: Start difference. First operand 3013 states and 8403 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:37,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:37,109 INFO L93 Difference]: Finished difference Result 3941 states and 10507 transitions. [2021-06-04 21:42:37,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:42:37,109 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:42:37,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:37,113 INFO L225 Difference]: With dead ends: 3941 [2021-06-04 21:42:37,113 INFO L226 Difference]: Without dead ends: 3671 [2021-06-04 21:42:37,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 568.6ms TimeCoverageRelationStatistics Valid=644, Invalid=1806, Unknown=0, NotChecked=0, Total=2450 [2021-06-04 21:42:37,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2021-06-04 21:42:37,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 3088. [2021-06-04 21:42:37,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 2.801425332037577) internal successors, (8648), 3087 states have internal predecessors, (8648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:37,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8648 transitions. [2021-06-04 21:42:37,158 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8648 transitions. Word has length 100 [2021-06-04 21:42:37,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:37,159 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8648 transitions. [2021-06-04 21:42:37,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:37,159 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8648 transitions. [2021-06-04 21:42:37,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:37,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:37,161 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:37,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-04 21:42:37,363 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:37,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:37,364 INFO L82 PathProgramCache]: Analyzing trace with hash -313638254, now seen corresponding path program 99 times [2021-06-04 21:42:37,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:37,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691274551] [2021-06-04 21:42:37,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:37,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:37,484 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:37,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:37,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691274551] [2021-06-04 21:42:37,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691274551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:37,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136613974] [2021-06-04 21:42:37,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:37,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-04 21:42:37,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:37,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:37,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:37,662 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:37,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136613974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:37,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:37,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-04 21:42:37,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330810985] [2021-06-04 21:42:37,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:42:37,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:37,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:42:37,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:42:37,663 INFO L87 Difference]: Start difference. First operand 3088 states and 8648 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:38,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:38,132 INFO L93 Difference]: Finished difference Result 4708 states and 12681 transitions. [2021-06-04 21:42:38,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:42:38,132 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:42:38,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:38,136 INFO L225 Difference]: With dead ends: 4708 [2021-06-04 21:42:38,136 INFO L226 Difference]: Without dead ends: 4438 [2021-06-04 21:42:38,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 431.2ms TimeCoverageRelationStatistics Valid=641, Invalid=1615, Unknown=0, NotChecked=0, Total=2256 [2021-06-04 21:42:38,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2021-06-04 21:42:38,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 3268. [2021-06-04 21:42:38,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3268 states, 3267 states have (on average 2.8181818181818183) internal successors, (9207), 3267 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:38,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3268 states to 3268 states and 9207 transitions. [2021-06-04 21:42:38,171 INFO L78 Accepts]: Start accepts. Automaton has 3268 states and 9207 transitions. Word has length 100 [2021-06-04 21:42:38,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:38,171 INFO L482 AbstractCegarLoop]: Abstraction has 3268 states and 9207 transitions. [2021-06-04 21:42:38,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:38,171 INFO L276 IsEmpty]: Start isEmpty. Operand 3268 states and 9207 transitions. [2021-06-04 21:42:38,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:38,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:38,173 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:38,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:38,373 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:38,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:38,374 INFO L82 PathProgramCache]: Analyzing trace with hash -291295004, now seen corresponding path program 100 times [2021-06-04 21:42:38,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:38,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269772710] [2021-06-04 21:42:38,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:38,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:38,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269772710] [2021-06-04 21:42:38,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269772710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:38,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105328170] [2021-06-04 21:42:38,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:38,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:42:38,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:38,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:38,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:38,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105328170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:38,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:38,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-04 21:42:38,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146477109] [2021-06-04 21:42:38,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:42:38,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:38,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:42:38,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:42:38,696 INFO L87 Difference]: Start difference. First operand 3268 states and 9207 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:39,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:39,380 INFO L93 Difference]: Finished difference Result 4651 states and 12541 transitions. [2021-06-04 21:42:39,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:42:39,380 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-04 21:42:39,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:39,384 INFO L225 Difference]: With dead ends: 4651 [2021-06-04 21:42:39,384 INFO L226 Difference]: Without dead ends: 4076 [2021-06-04 21:42:39,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 645.2ms TimeCoverageRelationStatistics Valid=804, Invalid=2276, Unknown=0, NotChecked=0, Total=3080 [2021-06-04 21:42:39,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-04 21:42:39,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-06-04 21:42:39,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:39,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-04 21:42:39,413 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 100 [2021-06-04 21:42:39,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:39,413 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-04 21:42:39,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:39,413 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-04 21:42:39,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:39,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:39,415 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:39,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:39,616 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:39,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:39,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1356878341, now seen corresponding path program 101 times [2021-06-04 21:42:39,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:39,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563517707] [2021-06-04 21:42:39,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:39,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:39,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563517707] [2021-06-04 21:42:39,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563517707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:39,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552700960] [2021-06-04 21:42:39,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:39,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-04 21:42:39,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:39,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:39,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:39,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552700960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:39,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:39,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-04 21:42:39,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314601557] [2021-06-04 21:42:39,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:42:39,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:39,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:42:39,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:42:39,982 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:40,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:40,291 INFO L93 Difference]: Finished difference Result 4346 states and 11497 transitions. [2021-06-04 21:42:40,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:42:40,292 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-04 21:42:40,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:40,295 INFO L225 Difference]: With dead ends: 4346 [2021-06-04 21:42:40,295 INFO L226 Difference]: Without dead ends: 4076 [2021-06-04 21:42:40,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 352.7ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-04 21:42:40,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-04 21:42:40,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-06-04 21:42:40,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:40,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-04 21:42:40,325 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-04 21:42:40,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:40,325 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-04 21:42:40,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:40,325 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-04 21:42:40,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:40,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:40,327 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:40,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-04 21:42:40,528 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:40,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:40,528 INFO L82 PathProgramCache]: Analyzing trace with hash -547826485, now seen corresponding path program 102 times [2021-06-04 21:42:40,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:40,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355814115] [2021-06-04 21:42:40,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:40,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:40,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:40,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355814115] [2021-06-04 21:42:40,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355814115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:40,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996682439] [2021-06-04 21:42:40,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:40,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-04 21:42:40,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:40,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:40,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:40,932 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:40,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996682439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:40,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:40,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-04 21:42:40,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447834884] [2021-06-04 21:42:40,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:42:40,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:40,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:42:40,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:42:40,933 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:41,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:41,304 INFO L93 Difference]: Finished difference Result 4641 states and 12087 transitions. [2021-06-04 21:42:41,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:42:41,304 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-04 21:42:41,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:41,307 INFO L225 Difference]: With dead ends: 4641 [2021-06-04 21:42:41,307 INFO L226 Difference]: Without dead ends: 4371 [2021-06-04 21:42:41,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 434.9ms TimeCoverageRelationStatistics Valid=465, Invalid=1427, Unknown=0, NotChecked=0, Total=1892 [2021-06-04 21:42:41,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2021-06-04 21:42:41,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 3303. [2021-06-04 21:42:41,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:41,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-04 21:42:41,337 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-04 21:42:41,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:41,337 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-04 21:42:41,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:41,337 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-04 21:42:41,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:41,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:41,339 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:41,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:41,539 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:41,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:41,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1939776583, now seen corresponding path program 103 times [2021-06-04 21:42:41,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:41,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376168624] [2021-06-04 21:42:41,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:41,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:41,691 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:41,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:41,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376168624] [2021-06-04 21:42:41,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376168624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:41,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910702] [2021-06-04 21:42:41,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:41,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:41,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:41,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:41,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:41,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-04 21:42:41,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158093438] [2021-06-04 21:42:41,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:42:41,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:41,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:42:41,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:42:41,889 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:42,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:42,238 INFO L93 Difference]: Finished difference Result 4596 states and 11997 transitions. [2021-06-04 21:42:42,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-04 21:42:42,238 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-04 21:42:42,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:42,242 INFO L225 Difference]: With dead ends: 4596 [2021-06-04 21:42:42,242 INFO L226 Difference]: Without dead ends: 4326 [2021-06-04 21:42:42,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 377.1ms TimeCoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2021-06-04 21:42:42,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-06-04 21:42:42,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3303. [2021-06-04 21:42:42,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:42,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-04 21:42:42,272 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-04 21:42:42,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:42,273 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-04 21:42:42,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:42,273 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-04 21:42:42,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:42,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:42,275 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:42,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:42,475 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:42,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:42,476 INFO L82 PathProgramCache]: Analyzing trace with hash 2110113417, now seen corresponding path program 104 times [2021-06-04 21:42:42,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:42,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250219276] [2021-06-04 21:42:42,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:42,636 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:42,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:42,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250219276] [2021-06-04 21:42:42,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250219276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:42,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838803736] [2021-06-04 21:42:42,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:42,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:42,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:42,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:42,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:42,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838803736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:42,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:42,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-04 21:42:42,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787527594] [2021-06-04 21:42:42,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:42:42,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:42,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:42:42,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:42:42,851 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:43,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:43,298 INFO L93 Difference]: Finished difference Result 4546 states and 11897 transitions. [2021-06-04 21:42:43,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:42:43,298 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-04 21:42:43,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:43,302 INFO L225 Difference]: With dead ends: 4546 [2021-06-04 21:42:43,302 INFO L226 Difference]: Without dead ends: 4276 [2021-06-04 21:42:43,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 479.3ms TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2021-06-04 21:42:43,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2021-06-04 21:42:43,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 3303. [2021-06-04 21:42:43,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:43,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-04 21:42:43,331 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-04 21:42:43,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:43,331 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-04 21:42:43,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:43,331 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-04 21:42:43,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:43,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:43,333 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:43,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-04 21:42:43,534 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:43,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:43,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1733263095, now seen corresponding path program 105 times [2021-06-04 21:42:43,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:43,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722466226] [2021-06-04 21:42:43,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:43,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:43,680 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:43,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:43,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722466226] [2021-06-04 21:42:43,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722466226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:43,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812222464] [2021-06-04 21:42:43,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:43,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-04 21:42:43,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:43,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:43,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:43,890 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:43,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812222464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:43,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:43,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-04 21:42:43,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151126617] [2021-06-04 21:42:43,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:42:43,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:43,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:42:43,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:42:43,891 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:44,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:44,281 INFO L93 Difference]: Finished difference Result 4496 states and 11797 transitions. [2021-06-04 21:42:44,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:42:44,281 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-04 21:42:44,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:44,285 INFO L225 Difference]: With dead ends: 4496 [2021-06-04 21:42:44,285 INFO L226 Difference]: Without dead ends: 4226 [2021-06-04 21:42:44,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 396.5ms TimeCoverageRelationStatistics Valid=506, Invalid=1564, Unknown=0, NotChecked=0, Total=2070 [2021-06-04 21:42:44,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-04 21:42:44,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3303. [2021-06-04 21:42:44,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:44,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-04 21:42:44,315 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-04 21:42:44,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:44,316 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-04 21:42:44,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:44,316 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-04 21:42:44,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:44,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:44,318 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:44,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-04 21:42:44,521 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:44,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:44,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1234948665, now seen corresponding path program 106 times [2021-06-04 21:42:44,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:44,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441704254] [2021-06-04 21:42:44,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:44,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:44,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441704254] [2021-06-04 21:42:44,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441704254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:44,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709846412] [2021-06-04 21:42:44,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:44,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:42:44,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:44,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:44,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:44,895 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:44,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709846412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:44,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:44,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-04 21:42:44,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260362857] [2021-06-04 21:42:44,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:42:44,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:44,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:42:44,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:42:44,896 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:45,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:45,381 INFO L93 Difference]: Finished difference Result 4446 states and 11697 transitions. [2021-06-04 21:42:45,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:42:45,381 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-04 21:42:45,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:45,385 INFO L225 Difference]: With dead ends: 4446 [2021-06-04 21:42:45,385 INFO L226 Difference]: Without dead ends: 4176 [2021-06-04 21:42:45,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 493.5ms TimeCoverageRelationStatistics Valid=531, Invalid=1725, Unknown=0, NotChecked=0, Total=2256 [2021-06-04 21:42:45,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-04 21:42:45,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3303. [2021-06-04 21:42:45,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:45,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-04 21:42:45,414 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-04 21:42:45,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:45,414 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-04 21:42:45,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:45,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-04 21:42:45,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:45,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:45,416 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:45,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-04 21:42:45,617 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:45,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:45,617 INFO L82 PathProgramCache]: Analyzing trace with hash -780732491, now seen corresponding path program 107 times [2021-06-04 21:42:45,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:45,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698082555] [2021-06-04 21:42:45,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:45,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:45,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698082555] [2021-06-04 21:42:45,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698082555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:45,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50046799] [2021-06-04 21:42:45,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:45,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-04 21:42:45,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:45,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:45,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:45,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50046799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:45,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:45,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-04 21:42:45,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666834501] [2021-06-04 21:42:45,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:42:45,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:45,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:42:45,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:42:45,964 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:46,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:46,380 INFO L93 Difference]: Finished difference Result 4396 states and 11597 transitions. [2021-06-04 21:42:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:42:46,380 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-04 21:42:46,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:46,384 INFO L225 Difference]: With dead ends: 4396 [2021-06-04 21:42:46,384 INFO L226 Difference]: Without dead ends: 4126 [2021-06-04 21:42:46,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 423.0ms TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2021-06-04 21:42:46,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-04 21:42:46,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 3303. [2021-06-04 21:42:46,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:46,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-04 21:42:46,414 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-04 21:42:46,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:46,414 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-04 21:42:46,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:46,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-04 21:42:46,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:46,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:46,416 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:46,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:46,617 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:46,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:46,618 INFO L82 PathProgramCache]: Analyzing trace with hash 218163845, now seen corresponding path program 108 times [2021-06-04 21:42:46,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:46,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745197979] [2021-06-04 21:42:46,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:46,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:46,784 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:46,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:46,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745197979] [2021-06-04 21:42:46,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745197979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:46,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244758860] [2021-06-04 21:42:46,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:46,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-04 21:42:46,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:46,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:46,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:47,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244758860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:47,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:47,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-04 21:42:47,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439235818] [2021-06-04 21:42:47,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:42:47,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:47,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:42:47,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:42:47,023 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:47,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:47,564 INFO L93 Difference]: Finished difference Result 4346 states and 11497 transitions. [2021-06-04 21:42:47,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:42:47,564 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-04 21:42:47,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:47,568 INFO L225 Difference]: With dead ends: 4346 [2021-06-04 21:42:47,568 INFO L226 Difference]: Without dead ends: 4076 [2021-06-04 21:42:47,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 545.8ms TimeCoverageRelationStatistics Valid=588, Invalid=1862, Unknown=0, NotChecked=0, Total=2450 [2021-06-04 21:42:47,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-04 21:42:47,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-06-04 21:42:47,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:47,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-04 21:42:47,597 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-04 21:42:47,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:47,598 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-04 21:42:47,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:47,598 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-04 21:42:47,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:47,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:47,601 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:47,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-04 21:42:47,805 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:47,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:47,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1661164045, now seen corresponding path program 109 times [2021-06-04 21:42:47,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:47,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713425116] [2021-06-04 21:42:47,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:47,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:47,947 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:47,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:47,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713425116] [2021-06-04 21:42:47,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713425116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:47,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541545462] [2021-06-04 21:42:47,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:48,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:48,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:48,133 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:48,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541545462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:48,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:48,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-04 21:42:48,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444311300] [2021-06-04 21:42:48,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:42:48,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:48,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:42:48,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:42:48,134 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:48,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:48,598 INFO L93 Difference]: Finished difference Result 4296 states and 11397 transitions. [2021-06-04 21:42:48,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:42:48,599 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-04 21:42:48,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:48,602 INFO L225 Difference]: With dead ends: 4296 [2021-06-04 21:42:48,602 INFO L226 Difference]: Without dead ends: 4026 [2021-06-04 21:42:48,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 440.1ms TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2021-06-04 21:42:48,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-06-04 21:42:48,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 3303. [2021-06-04 21:42:48,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:48,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-04 21:42:48,632 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-04 21:42:48,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:48,632 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-04 21:42:48,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:48,632 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-04 21:42:48,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:48,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:48,635 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:48,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-04 21:42:48,835 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:48,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:48,835 INFO L82 PathProgramCache]: Analyzing trace with hash 369155267, now seen corresponding path program 110 times [2021-06-04 21:42:48,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:48,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003787067] [2021-06-04 21:42:48,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:48,971 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:48,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:48,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003787067] [2021-06-04 21:42:48,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003787067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:48,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220555484] [2021-06-04 21:42:48,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:49,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:49,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:49,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:49,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:49,184 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:49,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220555484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:49,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:49,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-04 21:42:49,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809608394] [2021-06-04 21:42:49,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:42:49,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:49,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:42:49,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:42:49,185 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:49,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:49,770 INFO L93 Difference]: Finished difference Result 4246 states and 11297 transitions. [2021-06-04 21:42:49,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:42:49,771 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-04 21:42:49,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:49,774 INFO L225 Difference]: With dead ends: 4246 [2021-06-04 21:42:49,774 INFO L226 Difference]: Without dead ends: 3976 [2021-06-04 21:42:49,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 561.4ms TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2021-06-04 21:42:49,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3976 states. [2021-06-04 21:42:49,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3976 to 3303. [2021-06-04 21:42:49,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:49,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-04 21:42:49,804 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-04 21:42:49,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:49,804 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-04 21:42:49,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:49,804 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-04 21:42:49,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:49,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:49,806 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:50,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-04 21:42:50,006 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:50,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:50,007 INFO L82 PathProgramCache]: Analyzing trace with hash 983394737, now seen corresponding path program 111 times [2021-06-04 21:42:50,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:50,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158574188] [2021-06-04 21:42:50,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:50,145 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:50,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:50,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158574188] [2021-06-04 21:42:50,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158574188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:50,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851990155] [2021-06-04 21:42:50,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:50,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-04 21:42:50,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:50,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:50,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:50,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851990155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:50,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:50,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-04 21:42:50,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991599903] [2021-06-04 21:42:50,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:42:50,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:50,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:42:50,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:42:50,342 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:50,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:50,835 INFO L93 Difference]: Finished difference Result 4196 states and 11197 transitions. [2021-06-04 21:42:50,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:42:50,836 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-04 21:42:50,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:50,839 INFO L225 Difference]: With dead ends: 4196 [2021-06-04 21:42:50,839 INFO L226 Difference]: Without dead ends: 3926 [2021-06-04 21:42:50,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 471.9ms TimeCoverageRelationStatistics Valid=719, Invalid=1933, Unknown=0, NotChecked=0, Total=2652 [2021-06-04 21:42:50,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-06-04 21:42:50,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3303. [2021-06-04 21:42:50,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:50,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-04 21:42:50,868 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-04 21:42:50,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:50,868 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-04 21:42:50,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:50,868 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-04 21:42:50,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:50,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:50,870 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:51,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:51,073 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:51,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:51,073 INFO L82 PathProgramCache]: Analyzing trace with hash -731847551, now seen corresponding path program 112 times [2021-06-04 21:42:51,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:51,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446566183] [2021-06-04 21:42:51,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:51,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:51,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446566183] [2021-06-04 21:42:51,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446566183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:51,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192596243] [2021-06-04 21:42:51,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:51,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:42:51,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:51,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:51,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:51,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192596243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:51,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:51,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-04 21:42:51,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824171092] [2021-06-04 21:42:51,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:42:51,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:51,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:42:51,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:42:51,422 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:52,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:52,058 INFO L93 Difference]: Finished difference Result 4206 states and 11247 transitions. [2021-06-04 21:42:52,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:42:52,058 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-04 21:42:52,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:52,062 INFO L225 Difference]: With dead ends: 4206 [2021-06-04 21:42:52,062 INFO L226 Difference]: Without dead ends: 3936 [2021-06-04 21:42:52,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 612.7ms TimeCoverageRelationStatistics Valid=750, Invalid=2112, Unknown=0, NotChecked=0, Total=2862 [2021-06-04 21:42:52,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3936 states. [2021-06-04 21:42:52,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3936 to 3303. [2021-06-04 21:42:52,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.812840702604482) internal successors, (9288), 3302 states have internal predecessors, (9288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:52,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9288 transitions. [2021-06-04 21:42:52,092 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9288 transitions. Word has length 105 [2021-06-04 21:42:52,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:52,093 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9288 transitions. [2021-06-04 21:42:52,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:52,093 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9288 transitions. [2021-06-04 21:42:52,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:52,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:52,095 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:52,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:52,295 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:52,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:52,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1764495153, now seen corresponding path program 113 times [2021-06-04 21:42:52,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:52,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657915611] [2021-06-04 21:42:52,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:52,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:52,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657915611] [2021-06-04 21:42:52,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657915611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:52,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375608435] [2021-06-04 21:42:52,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:52,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-04 21:42:52,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:52,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:52,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:52,616 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:52,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375608435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:52,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:52,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-04 21:42:52,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112928942] [2021-06-04 21:42:52,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:42:52,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:52,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:42:52,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:42:52,617 INFO L87 Difference]: Start difference. First operand 3303 states and 9288 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:53,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:53,151 INFO L93 Difference]: Finished difference Result 4948 states and 13371 transitions. [2021-06-04 21:42:53,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:42:53,152 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-04 21:42:53,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:53,156 INFO L225 Difference]: With dead ends: 4948 [2021-06-04 21:42:53,156 INFO L226 Difference]: Without dead ends: 4678 [2021-06-04 21:42:53,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 492.6ms TimeCoverageRelationStatistics Valid=823, Invalid=2039, Unknown=0, NotChecked=0, Total=2862 [2021-06-04 21:42:53,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4678 states. [2021-06-04 21:42:53,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4678 to 3483. [2021-06-04 21:42:53,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3483 states, 3482 states have (on average 2.827972429638139) internal successors, (9847), 3482 states have internal predecessors, (9847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:53,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 9847 transitions. [2021-06-04 21:42:53,191 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 9847 transitions. Word has length 105 [2021-06-04 21:42:53,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:53,191 INFO L482 AbstractCegarLoop]: Abstraction has 3483 states and 9847 transitions. [2021-06-04 21:42:53,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:53,191 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 9847 transitions. [2021-06-04 21:42:53,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:53,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:53,193 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:53,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:53,394 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:53,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:53,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1742151903, now seen corresponding path program 114 times [2021-06-04 21:42:53,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:53,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054385193] [2021-06-04 21:42:53,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:53,525 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:53,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:53,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054385193] [2021-06-04 21:42:53,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054385193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:53,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377351239] [2021-06-04 21:42:53,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:53,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-04 21:42:53,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:53,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:53,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:53,766 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:53,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377351239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:53,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:53,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-04 21:42:53,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918701586] [2021-06-04 21:42:53,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:42:53,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:53,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:42:53,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:42:53,767 INFO L87 Difference]: Start difference. First operand 3483 states and 9847 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:54,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:54,467 INFO L93 Difference]: Finished difference Result 4816 states and 13036 transitions. [2021-06-04 21:42:54,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:42:54,467 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-04 21:42:54,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:54,471 INFO L225 Difference]: With dead ends: 4816 [2021-06-04 21:42:54,471 INFO L226 Difference]: Without dead ends: 4241 [2021-06-04 21:42:54,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 666.3ms TimeCoverageRelationStatistics Valid=896, Invalid=2526, Unknown=0, NotChecked=0, Total=3422 [2021-06-04 21:42:54,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4241 states. [2021-06-04 21:42:54,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4241 to 2324. [2021-06-04 21:42:54,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2324 states, 2323 states have (on average 2.7361170899698664) internal successors, (6356), 2323 states have internal predecessors, (6356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:54,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 6356 transitions. [2021-06-04 21:42:54,496 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 6356 transitions. Word has length 105 [2021-06-04 21:42:54,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:54,496 INFO L482 AbstractCegarLoop]: Abstraction has 2324 states and 6356 transitions. [2021-06-04 21:42:54,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:54,496 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 6356 transitions. [2021-06-04 21:42:54,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:42:54,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:54,498 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:54,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-04 21:42:54,699 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:54,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:54,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1657780875, now seen corresponding path program 115 times [2021-06-04 21:42:54,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:54,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779713095] [2021-06-04 21:42:54,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:54,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:54,881 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:54,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:54,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779713095] [2021-06-04 21:42:54,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779713095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:54,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412197725] [2021-06-04 21:42:54,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:54,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:42:54,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:55,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412197725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:55,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:55,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 25 [2021-06-04 21:42:55,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376976545] [2021-06-04 21:42:55,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:42:55,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:55,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:42:55,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:42:55,124 INFO L87 Difference]: Start difference. First operand 2324 states and 6356 transitions. Second operand has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:55,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:55,533 INFO L93 Difference]: Finished difference Result 3364 states and 8756 transitions. [2021-06-04 21:42:55,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:42:55,534 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:42:55,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:55,537 INFO L225 Difference]: With dead ends: 3364 [2021-06-04 21:42:55,537 INFO L226 Difference]: Without dead ends: 3030 [2021-06-04 21:42:55,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 454.5ms TimeCoverageRelationStatistics Valid=572, Invalid=1590, Unknown=0, NotChecked=0, Total=2162 [2021-06-04 21:42:55,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-06-04 21:42:55,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 2409. [2021-06-04 21:42:55,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 2.7101328903654487) internal successors, (6526), 2408 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:55,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 6526 transitions. [2021-06-04 21:42:55,571 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 6526 transitions. Word has length 110 [2021-06-04 21:42:55,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:55,571 INFO L482 AbstractCegarLoop]: Abstraction has 2409 states and 6526 transitions. [2021-06-04 21:42:55,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:55,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 6526 transitions. [2021-06-04 21:42:55,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:42:55,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:55,573 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:55,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-04 21:42:55,773 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:55,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:55,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1067386545, now seen corresponding path program 116 times [2021-06-04 21:42:55,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:55,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836564905] [2021-06-04 21:42:55,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:55,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:55,953 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:55,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:55,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836564905] [2021-06-04 21:42:55,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836564905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:55,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817412102] [2021-06-04 21:42:55,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:56,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:56,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:56,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:42:56,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:56,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817412102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:56,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:56,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-04 21:42:56,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038702695] [2021-06-04 21:42:56,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:42:56,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:56,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:42:56,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:42:56,183 INFO L87 Difference]: Start difference. First operand 2409 states and 6526 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:56,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:56,514 INFO L93 Difference]: Finished difference Result 4086 states and 10137 transitions. [2021-06-04 21:42:56,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:42:56,515 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:42:56,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:56,518 INFO L225 Difference]: With dead ends: 4086 [2021-06-04 21:42:56,518 INFO L226 Difference]: Without dead ends: 3816 [2021-06-04 21:42:56,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 369.6ms TimeCoverageRelationStatistics Valid=446, Invalid=1194, Unknown=0, NotChecked=0, Total=1640 [2021-06-04 21:42:56,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2021-06-04 21:42:56,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 2553. [2021-06-04 21:42:56,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2553 states, 2552 states have (on average 2.720611285266458) internal successors, (6943), 2552 states have internal predecessors, (6943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:56,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 6943 transitions. [2021-06-04 21:42:56,543 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 6943 transitions. Word has length 110 [2021-06-04 21:42:56,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:56,543 INFO L482 AbstractCegarLoop]: Abstraction has 2553 states and 6943 transitions. [2021-06-04 21:42:56,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:56,543 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 6943 transitions. [2021-06-04 21:42:56,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:42:56,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:56,545 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:56,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-04 21:42:56,746 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:56,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:56,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1447830497, now seen corresponding path program 117 times [2021-06-04 21:42:56,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:56,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972058385] [2021-06-04 21:42:56,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:56,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:56,945 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:56,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:56,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972058385] [2021-06-04 21:42:56,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972058385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:56,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180720065] [2021-06-04 21:42:56,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:57,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-04 21:42:57,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:57,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:42:57,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:57,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180720065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:57,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:57,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-04 21:42:57,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060846743] [2021-06-04 21:42:57,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:42:57,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:57,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:42:57,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:42:57,174 INFO L87 Difference]: Start difference. First operand 2553 states and 6943 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:57,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:57,550 INFO L93 Difference]: Finished difference Result 4046 states and 10132 transitions. [2021-06-04 21:42:57,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:42:57,550 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:42:57,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:57,553 INFO L225 Difference]: With dead ends: 4046 [2021-06-04 21:42:57,553 INFO L226 Difference]: Without dead ends: 3776 [2021-06-04 21:42:57,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 451.8ms TimeCoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2021-06-04 21:42:57,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2021-06-04 21:42:57,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 2628. [2021-06-04 21:42:57,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2628 states, 2627 states have (on average 2.7285877426722496) internal successors, (7168), 2627 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:57,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2628 states to 2628 states and 7168 transitions. [2021-06-04 21:42:57,592 INFO L78 Accepts]: Start accepts. Automaton has 2628 states and 7168 transitions. Word has length 110 [2021-06-04 21:42:57,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:57,592 INFO L482 AbstractCegarLoop]: Abstraction has 2628 states and 7168 transitions. [2021-06-04 21:42:57,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:57,592 INFO L276 IsEmpty]: Start isEmpty. Operand 2628 states and 7168 transitions. [2021-06-04 21:42:57,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:42:57,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:57,594 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:57,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-04 21:42:57,795 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:57,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:57,795 INFO L82 PathProgramCache]: Analyzing trace with hash -823455347, now seen corresponding path program 118 times [2021-06-04 21:42:57,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:57,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759738717] [2021-06-04 21:42:57,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:57,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:57,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759738717] [2021-06-04 21:42:57,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759738717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:57,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778936391] [2021-06-04 21:42:57,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:58,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:42:58,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:58,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:42:58,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:58,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778936391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:58,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:58,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-04 21:42:58,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844641160] [2021-06-04 21:42:58,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:42:58,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:58,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:42:58,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:42:58,182 INFO L87 Difference]: Start difference. First operand 2628 states and 7168 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:58,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:58,523 INFO L93 Difference]: Finished difference Result 4096 states and 10307 transitions. [2021-06-04 21:42:58,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:42:58,523 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:42:58,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:58,527 INFO L225 Difference]: With dead ends: 4096 [2021-06-04 21:42:58,527 INFO L226 Difference]: Without dead ends: 3826 [2021-06-04 21:42:58,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 386.9ms TimeCoverageRelationStatistics Valid=454, Invalid=1352, Unknown=0, NotChecked=0, Total=1806 [2021-06-04 21:42:58,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3826 states. [2021-06-04 21:42:58,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3826 to 2703. [2021-06-04 21:42:58,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2703 states, 2702 states have (on average 2.736121391561806) internal successors, (7393), 2702 states have internal predecessors, (7393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:58,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2703 states to 2703 states and 7393 transitions. [2021-06-04 21:42:58,553 INFO L78 Accepts]: Start accepts. Automaton has 2703 states and 7393 transitions. Word has length 110 [2021-06-04 21:42:58,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:58,553 INFO L482 AbstractCegarLoop]: Abstraction has 2703 states and 7393 transitions. [2021-06-04 21:42:58,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:58,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2703 states and 7393 transitions. [2021-06-04 21:42:58,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:42:58,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:58,555 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:58,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-04 21:42:58,756 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:58,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:58,757 INFO L82 PathProgramCache]: Analyzing trace with hash -14403491, now seen corresponding path program 119 times [2021-06-04 21:42:58,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:58,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105680667] [2021-06-04 21:42:58,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:58,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:58,929 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:58,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:58,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105680667] [2021-06-04 21:42:58,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105680667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:58,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749626777] [2021-06-04 21:42:58,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:58,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-04 21:42:58,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:58,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:42:58,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:59,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749626777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:59,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:59,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-04 21:42:59,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745934927] [2021-06-04 21:42:59,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:42:59,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:59,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:42:59,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:42:59,151 INFO L87 Difference]: Start difference. First operand 2703 states and 7393 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:59,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:59,616 INFO L93 Difference]: Finished difference Result 4121 states and 10432 transitions. [2021-06-04 21:42:59,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:42:59,616 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:42:59,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:59,620 INFO L225 Difference]: With dead ends: 4121 [2021-06-04 21:42:59,620 INFO L226 Difference]: Without dead ends: 3851 [2021-06-04 21:42:59,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 476.5ms TimeCoverageRelationStatistics Valid=523, Invalid=1639, Unknown=0, NotChecked=0, Total=2162 [2021-06-04 21:42:59,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3851 states. [2021-06-04 21:42:59,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3851 to 2778. [2021-06-04 21:42:59,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2778 states, 2777 states have (on average 2.7432481094706516) internal successors, (7618), 2777 states have internal predecessors, (7618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:59,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2778 states to 2778 states and 7618 transitions. [2021-06-04 21:42:59,661 INFO L78 Accepts]: Start accepts. Automaton has 2778 states and 7618 transitions. Word has length 110 [2021-06-04 21:42:59,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:59,661 INFO L482 AbstractCegarLoop]: Abstraction has 2778 states and 7618 transitions. [2021-06-04 21:42:59,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:59,661 INFO L276 IsEmpty]: Start isEmpty. Operand 2778 states and 7618 transitions. [2021-06-04 21:42:59,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:42:59,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:59,663 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:42:59,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:59,865 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:59,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:59,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1406353589, now seen corresponding path program 120 times [2021-06-04 21:42:59,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:59,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981129346] [2021-06-04 21:42:59,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:00,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:00,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981129346] [2021-06-04 21:43:00,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981129346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:00,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845219281] [2021-06-04 21:43:00,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:00,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-04 21:43:00,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:00,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:43:00,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:00,242 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:00,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845219281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:00,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:00,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-04 21:43:00,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584336422] [2021-06-04 21:43:00,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:00,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:00,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:00,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:00,243 INFO L87 Difference]: Start difference. First operand 2778 states and 7618 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:00,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:00,626 INFO L93 Difference]: Finished difference Result 4146 states and 10557 transitions. [2021-06-04 21:43:00,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-04 21:43:00,626 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:43:00,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:00,630 INFO L225 Difference]: With dead ends: 4146 [2021-06-04 21:43:00,630 INFO L226 Difference]: Without dead ends: 3876 [2021-06-04 21:43:00,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 407.1ms TimeCoverageRelationStatistics Valid=478, Invalid=1502, Unknown=0, NotChecked=0, Total=1980 [2021-06-04 21:43:00,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3876 states. [2021-06-04 21:43:00,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3876 to 2853. [2021-06-04 21:43:00,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2853 states, 2852 states have (on average 2.75) internal successors, (7843), 2852 states have internal predecessors, (7843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:00,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 7843 transitions. [2021-06-04 21:43:00,658 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 7843 transitions. Word has length 110 [2021-06-04 21:43:00,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:00,658 INFO L482 AbstractCegarLoop]: Abstraction has 2853 states and 7843 transitions. [2021-06-04 21:43:00,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:00,658 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 7843 transitions. [2021-06-04 21:43:00,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:00,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:00,660 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:00,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-04 21:43:00,861 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:00,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:00,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1651430885, now seen corresponding path program 121 times [2021-06-04 21:43:00,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:00,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081033591] [2021-06-04 21:43:00,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:01,027 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:01,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:01,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081033591] [2021-06-04 21:43:01,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081033591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:01,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91871232] [2021-06-04 21:43:01,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:01,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:01,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:43:01,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:01,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91871232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:01,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:01,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-04 21:43:01,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189411875] [2021-06-04 21:43:01,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:01,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:01,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:01,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:01,245 INFO L87 Difference]: Start difference. First operand 2853 states and 7843 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:01,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:01,752 INFO L93 Difference]: Finished difference Result 4171 states and 10682 transitions. [2021-06-04 21:43:01,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:43:01,752 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:43:01,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:01,755 INFO L225 Difference]: With dead ends: 4171 [2021-06-04 21:43:01,755 INFO L226 Difference]: Without dead ends: 3901 [2021-06-04 21:43:01,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 525.3ms TimeCoverageRelationStatistics Valid=555, Invalid=1797, Unknown=0, NotChecked=0, Total=2352 [2021-06-04 21:43:01,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3901 states. [2021-06-04 21:43:01,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3901 to 2928. [2021-06-04 21:43:01,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2927 states have (on average 2.756405876323881) internal successors, (8068), 2927 states have internal predecessors, (8068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:01,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 8068 transitions. [2021-06-04 21:43:01,782 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 8068 transitions. Word has length 110 [2021-06-04 21:43:01,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:01,782 INFO L482 AbstractCegarLoop]: Abstraction has 2928 states and 8068 transitions. [2021-06-04 21:43:01,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:01,782 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 8068 transitions. [2021-06-04 21:43:01,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:01,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:01,784 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:01,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-04 21:43:01,985 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:01,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:01,985 INFO L82 PathProgramCache]: Analyzing trace with hash -2028281207, now seen corresponding path program 122 times [2021-06-04 21:43:01,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:01,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337526264] [2021-06-04 21:43:01,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:01,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:02,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:02,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337526264] [2021-06-04 21:43:02,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337526264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:02,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526656493] [2021-06-04 21:43:02,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:02,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:43:02,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:02,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:43:02,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:02,454 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:02,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526656493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:02,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:02,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-04 21:43:02,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089202564] [2021-06-04 21:43:02,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:02,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:02,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:02,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:02,455 INFO L87 Difference]: Start difference. First operand 2928 states and 8068 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:02,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:02,871 INFO L93 Difference]: Finished difference Result 4196 states and 10807 transitions. [2021-06-04 21:43:02,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:43:02,871 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:43:02,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:02,875 INFO L225 Difference]: With dead ends: 4196 [2021-06-04 21:43:02,875 INFO L226 Difference]: Without dead ends: 3926 [2021-06-04 21:43:02,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 441.4ms TimeCoverageRelationStatistics Valid=518, Invalid=1644, Unknown=0, NotChecked=0, Total=2162 [2021-06-04 21:43:02,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-06-04 21:43:02,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3003. [2021-06-04 21:43:02,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 2.762491672218521) internal successors, (8293), 3002 states have internal predecessors, (8293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:02,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 8293 transitions. [2021-06-04 21:43:02,907 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 8293 transitions. Word has length 110 [2021-06-04 21:43:02,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:02,907 INFO L482 AbstractCegarLoop]: Abstraction has 3003 states and 8293 transitions. [2021-06-04 21:43:02,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:02,907 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 8293 transitions. [2021-06-04 21:43:02,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:02,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:02,909 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:03,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:03,113 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:03,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:03,113 INFO L82 PathProgramCache]: Analyzing trace with hash -701525671, now seen corresponding path program 123 times [2021-06-04 21:43:03,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:03,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797963985] [2021-06-04 21:43:03,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:03,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:03,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:03,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797963985] [2021-06-04 21:43:03,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797963985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:03,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424156797] [2021-06-04 21:43:03,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:03,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-04 21:43:03,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:03,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:43:03,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:03,511 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:03,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424156797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:03,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:03,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-04 21:43:03,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080716714] [2021-06-04 21:43:03,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:03,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:03,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:03,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:03,512 INFO L87 Difference]: Start difference. First operand 3003 states and 8293 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:04,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:04,060 INFO L93 Difference]: Finished difference Result 4221 states and 10932 transitions. [2021-06-04 21:43:04,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:43:04,060 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:43:04,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:04,064 INFO L225 Difference]: With dead ends: 4221 [2021-06-04 21:43:04,064 INFO L226 Difference]: Without dead ends: 3951 [2021-06-04 21:43:04,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 546.3ms TimeCoverageRelationStatistics Valid=603, Invalid=1947, Unknown=0, NotChecked=0, Total=2550 [2021-06-04 21:43:04,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3951 states. [2021-06-04 21:43:04,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3951 to 3078. [2021-06-04 21:43:04,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3078 states, 3077 states have (on average 2.7682807929801756) internal successors, (8518), 3077 states have internal predecessors, (8518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:04,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3078 states to 3078 states and 8518 transitions. [2021-06-04 21:43:04,093 INFO L78 Accepts]: Start accepts. Automaton has 3078 states and 8518 transitions. Word has length 110 [2021-06-04 21:43:04,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:04,094 INFO L482 AbstractCegarLoop]: Abstraction has 3078 states and 8518 transitions. [2021-06-04 21:43:04,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:04,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3078 states and 8518 transitions. [2021-06-04 21:43:04,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:04,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:04,096 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:04,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:04,296 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:04,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:04,297 INFO L82 PathProgramCache]: Analyzing trace with hash -247309497, now seen corresponding path program 124 times [2021-06-04 21:43:04,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:04,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952644361] [2021-06-04 21:43:04,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:04,446 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:04,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:04,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952644361] [2021-06-04 21:43:04,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952644361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:04,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716834675] [2021-06-04 21:43:04,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:04,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:43:04,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:04,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:43:04,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:04,680 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:04,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716834675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:04,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:04,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-04 21:43:04,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232462586] [2021-06-04 21:43:04,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:04,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:04,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:04,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:04,681 INFO L87 Difference]: Start difference. First operand 3078 states and 8518 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:05,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:05,128 INFO L93 Difference]: Finished difference Result 4246 states and 11057 transitions. [2021-06-04 21:43:05,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:43:05,128 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:43:05,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:05,132 INFO L225 Difference]: With dead ends: 4246 [2021-06-04 21:43:05,132 INFO L226 Difference]: Without dead ends: 3976 [2021-06-04 21:43:05,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 452.0ms TimeCoverageRelationStatistics Valid=574, Invalid=1778, Unknown=0, NotChecked=0, Total=2352 [2021-06-04 21:43:05,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3976 states. [2021-06-04 21:43:05,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3976 to 3153. [2021-06-04 21:43:05,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3153 states, 3152 states have (on average 2.7737944162436547) internal successors, (8743), 3152 states have internal predecessors, (8743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:05,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 8743 transitions. [2021-06-04 21:43:05,163 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 8743 transitions. Word has length 110 [2021-06-04 21:43:05,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:05,163 INFO L482 AbstractCegarLoop]: Abstraction has 3153 states and 8743 transitions. [2021-06-04 21:43:05,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:05,164 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 8743 transitions. [2021-06-04 21:43:05,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:05,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:05,166 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:05,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:05,366 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:05,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:05,366 INFO L82 PathProgramCache]: Analyzing trace with hash 751586839, now seen corresponding path program 125 times [2021-06-04 21:43:05,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:05,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717297946] [2021-06-04 21:43:05,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:05,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:05,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717297946] [2021-06-04 21:43:05,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717297946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:05,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287189036] [2021-06-04 21:43:05,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:05,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-04 21:43:05,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:05,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:43:05,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:05,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287189036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:05,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:05,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-04 21:43:05,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712131617] [2021-06-04 21:43:05,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:05,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:05,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:05,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:05,756 INFO L87 Difference]: Start difference. First operand 3153 states and 8743 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:06,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:06,363 INFO L93 Difference]: Finished difference Result 4271 states and 11182 transitions. [2021-06-04 21:43:06,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:43:06,364 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:43:06,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:06,367 INFO L225 Difference]: With dead ends: 4271 [2021-06-04 21:43:06,367 INFO L226 Difference]: Without dead ends: 4001 [2021-06-04 21:43:06,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 598.4ms TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2021-06-04 21:43:06,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-06-04 21:43:06,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 3228. [2021-06-04 21:43:06,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3228 states, 3227 states have (on average 2.779051750852185) internal successors, (8968), 3227 states have internal predecessors, (8968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:06,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3228 states to 3228 states and 8968 transitions. [2021-06-04 21:43:06,400 INFO L78 Accepts]: Start accepts. Automaton has 3228 states and 8968 transitions. Word has length 110 [2021-06-04 21:43:06,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:06,400 INFO L482 AbstractCegarLoop]: Abstraction has 3228 states and 8968 transitions. [2021-06-04 21:43:06,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:06,400 INFO L276 IsEmpty]: Start isEmpty. Operand 3228 states and 8968 transitions. [2021-06-04 21:43:06,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:06,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:06,402 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:06,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-04 21:43:06,607 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:06,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:06,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1127741051, now seen corresponding path program 126 times [2021-06-04 21:43:06,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:06,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376450680] [2021-06-04 21:43:06,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:06,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:06,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376450680] [2021-06-04 21:43:06,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376450680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:06,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734693951] [2021-06-04 21:43:06,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:06,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-04 21:43:06,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:06,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:43:06,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:06,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734693951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:06,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:06,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-04 21:43:06,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389261973] [2021-06-04 21:43:06,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:06,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:06,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:06,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:06,984 INFO L87 Difference]: Start difference. First operand 3228 states and 8968 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:07,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:07,515 INFO L93 Difference]: Finished difference Result 4296 states and 11307 transitions. [2021-06-04 21:43:07,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:43:07,515 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:43:07,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:07,519 INFO L225 Difference]: With dead ends: 4296 [2021-06-04 21:43:07,519 INFO L226 Difference]: Without dead ends: 4026 [2021-06-04 21:43:07,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 507.8ms TimeCoverageRelationStatistics Valid=646, Invalid=1904, Unknown=0, NotChecked=0, Total=2550 [2021-06-04 21:43:07,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-06-04 21:43:07,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 3303. [2021-06-04 21:43:07,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.784070260448213) internal successors, (9193), 3302 states have internal predecessors, (9193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:07,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9193 transitions. [2021-06-04 21:43:07,552 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9193 transitions. Word has length 110 [2021-06-04 21:43:07,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:07,553 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9193 transitions. [2021-06-04 21:43:07,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:07,553 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9193 transitions. [2021-06-04 21:43:07,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:07,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:07,555 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:07,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-04 21:43:07,763 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:07,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:07,763 INFO L82 PathProgramCache]: Analyzing trace with hash 902578261, now seen corresponding path program 127 times [2021-06-04 21:43:07,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:07,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654160255] [2021-06-04 21:43:07,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:07,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:07,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:07,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654160255] [2021-06-04 21:43:07,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654160255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:07,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567297923] [2021-06-04 21:43:07,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:07,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:43:07,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:08,147 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:08,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567297923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:08,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:08,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-04 21:43:08,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775970800] [2021-06-04 21:43:08,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:08,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:08,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:08,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:08,148 INFO L87 Difference]: Start difference. First operand 3303 states and 9193 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:08,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:08,788 INFO L93 Difference]: Finished difference Result 4321 states and 11432 transitions. [2021-06-04 21:43:08,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:43:08,789 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:43:08,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:08,793 INFO L225 Difference]: With dead ends: 4321 [2021-06-04 21:43:08,793 INFO L226 Difference]: Without dead ends: 4051 [2021-06-04 21:43:08,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 622.7ms TimeCoverageRelationStatistics Valid=747, Invalid=2223, Unknown=0, NotChecked=0, Total=2970 [2021-06-04 21:43:08,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-04 21:43:08,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 3378. [2021-06-04 21:43:08,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3378 states, 3377 states have (on average 2.788865857269766) internal successors, (9418), 3377 states have internal predecessors, (9418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:08,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 9418 transitions. [2021-06-04 21:43:08,827 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 9418 transitions. Word has length 110 [2021-06-04 21:43:08,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:08,827 INFO L482 AbstractCegarLoop]: Abstraction has 3378 states and 9418 transitions. [2021-06-04 21:43:08,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:08,827 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 9418 transitions. [2021-06-04 21:43:08,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:08,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:08,829 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:09,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:09,030 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:09,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:09,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1516817731, now seen corresponding path program 128 times [2021-06-04 21:43:09,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:09,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614027088] [2021-06-04 21:43:09,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:09,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:09,175 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:09,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:09,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614027088] [2021-06-04 21:43:09,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614027088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:09,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440385675] [2021-06-04 21:43:09,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:09,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:43:09,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:09,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:43:09,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:09,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440385675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:09,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:09,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-04 21:43:09,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926481860] [2021-06-04 21:43:09,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:09,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:09,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:09,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:09,374 INFO L87 Difference]: Start difference. First operand 3378 states and 9418 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:09,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:09,893 INFO L93 Difference]: Finished difference Result 4391 states and 11677 transitions. [2021-06-04 21:43:09,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:43:09,893 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:43:09,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:09,897 INFO L225 Difference]: With dead ends: 4391 [2021-06-04 21:43:09,897 INFO L226 Difference]: Without dead ends: 4121 [2021-06-04 21:43:09,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 506.2ms TimeCoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2021-06-04 21:43:09,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4121 states. [2021-06-04 21:43:09,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4121 to 3453. [2021-06-04 21:43:09,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3453 states, 3452 states have (on average 2.7977983777520277) internal successors, (9658), 3452 states have internal predecessors, (9658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:09,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 9658 transitions. [2021-06-04 21:43:09,947 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 9658 transitions. Word has length 110 [2021-06-04 21:43:09,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:09,947 INFO L482 AbstractCegarLoop]: Abstraction has 3453 states and 9658 transitions. [2021-06-04 21:43:09,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:09,947 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 9658 transitions. [2021-06-04 21:43:09,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:09,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:09,950 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:10,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-04 21:43:10,151 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:10,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:10,151 INFO L82 PathProgramCache]: Analyzing trace with hash -198424557, now seen corresponding path program 129 times [2021-06-04 21:43:10,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:10,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370203391] [2021-06-04 21:43:10,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:10,298 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:10,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:10,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370203391] [2021-06-04 21:43:10,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370203391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:10,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813352917] [2021-06-04 21:43:10,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:10,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-04 21:43:10,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:10,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:43:10,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:10,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813352917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:10,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:10,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-04 21:43:10,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395245862] [2021-06-04 21:43:10,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:10,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:10,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:10,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:10,514 INFO L87 Difference]: Start difference. First operand 3453 states and 9658 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:11,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:11,264 INFO L93 Difference]: Finished difference Result 4969 states and 13303 transitions. [2021-06-04 21:43:11,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:43:11,264 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:43:11,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:11,270 INFO L225 Difference]: With dead ends: 4969 [2021-06-04 21:43:11,270 INFO L226 Difference]: Without dead ends: 4346 [2021-06-04 21:43:11,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 695.5ms TimeCoverageRelationStatistics Valid=866, Invalid=2556, Unknown=0, NotChecked=0, Total=3422 [2021-06-04 21:43:11,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4346 states. [2021-06-04 21:43:11,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4346 to 3528. [2021-06-04 21:43:11,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8035157357527645) internal successors, (9888), 3527 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:11,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9888 transitions. [2021-06-04 21:43:11,303 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9888 transitions. Word has length 110 [2021-06-04 21:43:11,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:11,303 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9888 transitions. [2021-06-04 21:43:11,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:11,303 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9888 transitions. [2021-06-04 21:43:11,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:11,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:11,306 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:11,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-04 21:43:11,509 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:11,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:11,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1231072159, now seen corresponding path program 130 times [2021-06-04 21:43:11,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:11,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062332772] [2021-06-04 21:43:11,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:11,676 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:11,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:11,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062332772] [2021-06-04 21:43:11,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062332772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:11,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902097229] [2021-06-04 21:43:11,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:11,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:43:11,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:11,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:43:11,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:11,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902097229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:11,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:11,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-04 21:43:11,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849944722] [2021-06-04 21:43:11,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:11,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:11,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:11,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:11,871 INFO L87 Difference]: Start difference. First operand 3528 states and 9888 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:12,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:12,452 INFO L93 Difference]: Finished difference Result 5198 states and 14021 transitions. [2021-06-04 21:43:12,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:43:12,453 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:43:12,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:12,458 INFO L225 Difference]: With dead ends: 5198 [2021-06-04 21:43:12,458 INFO L226 Difference]: Without dead ends: 4928 [2021-06-04 21:43:12,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 555.2ms TimeCoverageRelationStatistics Valid=839, Invalid=2131, Unknown=0, NotChecked=0, Total=2970 [2021-06-04 21:43:12,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2021-06-04 21:43:12,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 3708. [2021-06-04 21:43:12,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3708 states, 3707 states have (on average 2.8181818181818183) internal successors, (10447), 3707 states have internal predecessors, (10447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:12,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 10447 transitions. [2021-06-04 21:43:12,493 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 10447 transitions. Word has length 110 [2021-06-04 21:43:12,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:12,493 INFO L482 AbstractCegarLoop]: Abstraction has 3708 states and 10447 transitions. [2021-06-04 21:43:12,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:12,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 10447 transitions. [2021-06-04 21:43:12,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:12,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:12,496 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:12,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-04 21:43:12,697 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:12,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:12,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1208728909, now seen corresponding path program 131 times [2021-06-04 21:43:12,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:12,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321684919] [2021-06-04 21:43:12,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:12,893 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:12,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:12,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321684919] [2021-06-04 21:43:12,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321684919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:12,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369417669] [2021-06-04 21:43:12,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:12,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-04 21:43:12,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:12,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:43:12,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:13,144 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:13,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369417669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:13,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:13,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-04 21:43:13,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785855679] [2021-06-04 21:43:13,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:13,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:13,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:13,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:13,145 INFO L87 Difference]: Start difference. First operand 3708 states and 10447 transitions. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:14,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:14,015 INFO L93 Difference]: Finished difference Result 5021 states and 13521 transitions. [2021-06-04 21:43:14,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:43:14,016 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-04 21:43:14,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:14,020 INFO L225 Difference]: With dead ends: 5021 [2021-06-04 21:43:14,020 INFO L226 Difference]: Without dead ends: 4446 [2021-06-04 21:43:14,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 845.1ms TimeCoverageRelationStatistics Valid=997, Invalid=2785, Unknown=0, NotChecked=0, Total=3782 [2021-06-04 21:43:14,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4446 states. [2021-06-04 21:43:14,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4446 to 2603. [2021-06-04 21:43:14,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.735588009223674) internal successors, (7118), 2602 states have internal predecessors, (7118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:14,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7118 transitions. [2021-06-04 21:43:14,048 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7118 transitions. Word has length 110 [2021-06-04 21:43:14,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:14,048 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7118 transitions. [2021-06-04 21:43:14,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:14,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7118 transitions. [2021-06-04 21:43:14,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:14,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:14,050 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:14,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:14,250 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:14,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:14,251 INFO L82 PathProgramCache]: Analyzing trace with hash -207372468, now seen corresponding path program 132 times [2021-06-04 21:43:14,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:14,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317863591] [2021-06-04 21:43:14,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:14,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:14,458 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:14,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:14,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317863591] [2021-06-04 21:43:14,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317863591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:14,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994694880] [2021-06-04 21:43:14,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:14,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-04 21:43:14,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:14,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:14,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:14,667 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:14,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994694880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:14,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:14,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-04 21:43:14,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351613015] [2021-06-04 21:43:14,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:14,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:14,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:14,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:14,668 INFO L87 Difference]: Start difference. First operand 2603 states and 7118 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:15,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:15,050 INFO L93 Difference]: Finished difference Result 3821 states and 9757 transitions. [2021-06-04 21:43:15,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:43:15,051 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:15,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:15,054 INFO L225 Difference]: With dead ends: 3821 [2021-06-04 21:43:15,054 INFO L226 Difference]: Without dead ends: 3551 [2021-06-04 21:43:15,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 406.4ms TimeCoverageRelationStatistics Valid=479, Invalid=1413, Unknown=0, NotChecked=0, Total=1892 [2021-06-04 21:43:15,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2021-06-04 21:43:15,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 2678. [2021-06-04 21:43:15,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2677 states have (on average 2.742995890922675) internal successors, (7343), 2677 states have internal predecessors, (7343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:15,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7343 transitions. [2021-06-04 21:43:15,079 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7343 transitions. Word has length 115 [2021-06-04 21:43:15,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:15,079 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7343 transitions. [2021-06-04 21:43:15,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:15,080 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7343 transitions. [2021-06-04 21:43:15,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:15,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:15,081 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:15,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:15,282 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:15,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:15,282 INFO L82 PathProgramCache]: Analyzing trace with hash -587816420, now seen corresponding path program 133 times [2021-06-04 21:43:15,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:15,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4814301] [2021-06-04 21:43:15,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:15,473 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:15,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:15,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4814301] [2021-06-04 21:43:15,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4814301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:15,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776838236] [2021-06-04 21:43:15,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:15,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:15,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:15,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776838236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:15,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:15,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-04 21:43:15,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931187082] [2021-06-04 21:43:15,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:15,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:15,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:15,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:15,687 INFO L87 Difference]: Start difference. First operand 2678 states and 7343 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:16,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:16,093 INFO L93 Difference]: Finished difference Result 4241 states and 10672 transitions. [2021-06-04 21:43:16,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:43:16,094 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:16,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:16,097 INFO L225 Difference]: With dead ends: 4241 [2021-06-04 21:43:16,097 INFO L226 Difference]: Without dead ends: 3971 [2021-06-04 21:43:16,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 464.6ms TimeCoverageRelationStatistics Valid=529, Invalid=1633, Unknown=0, NotChecked=0, Total=2162 [2021-06-04 21:43:16,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2021-06-04 21:43:16,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 2753. [2021-06-04 21:43:16,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 2.75) internal successors, (7568), 2752 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:16,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7568 transitions. [2021-06-04 21:43:16,142 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7568 transitions. Word has length 115 [2021-06-04 21:43:16,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:16,142 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7568 transitions. [2021-06-04 21:43:16,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:16,142 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7568 transitions. [2021-06-04 21:43:16,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:16,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:16,144 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:16,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:16,344 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:16,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:16,345 INFO L82 PathProgramCache]: Analyzing trace with hash 36558730, now seen corresponding path program 134 times [2021-06-04 21:43:16,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:16,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872618681] [2021-06-04 21:43:16,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:16,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:16,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872618681] [2021-06-04 21:43:16,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872618681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:16,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186798681] [2021-06-04 21:43:16,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:16,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:43:16,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:16,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:16,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:16,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186798681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:16,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:16,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-04 21:43:16,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373487940] [2021-06-04 21:43:16,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:16,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:16,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:16,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:16,735 INFO L87 Difference]: Start difference. First operand 2753 states and 7568 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:17,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:17,148 INFO L93 Difference]: Finished difference Result 4271 states and 10807 transitions. [2021-06-04 21:43:17,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:43:17,148 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:17,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:17,152 INFO L225 Difference]: With dead ends: 4271 [2021-06-04 21:43:17,152 INFO L226 Difference]: Without dead ends: 4001 [2021-06-04 21:43:17,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 435.7ms TimeCoverageRelationStatistics Valid=531, Invalid=1631, Unknown=0, NotChecked=0, Total=2162 [2021-06-04 21:43:17,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-06-04 21:43:17,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 2828. [2021-06-04 21:43:17,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 2.75663247258578) internal successors, (7793), 2827 states have internal predecessors, (7793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:17,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7793 transitions. [2021-06-04 21:43:17,181 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7793 transitions. Word has length 115 [2021-06-04 21:43:17,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:17,181 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7793 transitions. [2021-06-04 21:43:17,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:17,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7793 transitions. [2021-06-04 21:43:17,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:17,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:17,183 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:17,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-06-04 21:43:17,383 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:17,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:17,384 INFO L82 PathProgramCache]: Analyzing trace with hash 845610586, now seen corresponding path program 135 times [2021-06-04 21:43:17,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:17,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008637313] [2021-06-04 21:43:17,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:17,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:17,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008637313] [2021-06-04 21:43:17,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008637313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:17,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761191075] [2021-06-04 21:43:17,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:17,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-04 21:43:17,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:17,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:17,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:17,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761191075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:17,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:17,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-04 21:43:17,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179340001] [2021-06-04 21:43:17,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:17,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:17,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:17,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:17,799 INFO L87 Difference]: Start difference. First operand 2828 states and 7793 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:18,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:18,281 INFO L93 Difference]: Finished difference Result 4296 states and 10932 transitions. [2021-06-04 21:43:18,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:43:18,281 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:18,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:18,285 INFO L225 Difference]: With dead ends: 4296 [2021-06-04 21:43:18,285 INFO L226 Difference]: Without dead ends: 4026 [2021-06-04 21:43:18,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 518.5ms TimeCoverageRelationStatistics Valid=553, Invalid=1799, Unknown=0, NotChecked=0, Total=2352 [2021-06-04 21:43:18,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-06-04 21:43:18,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 2903. [2021-06-04 21:43:18,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2903 states, 2902 states have (on average 2.7629221226740177) internal successors, (8018), 2902 states have internal predecessors, (8018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:18,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 8018 transitions. [2021-06-04 21:43:18,313 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 8018 transitions. Word has length 115 [2021-06-04 21:43:18,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:18,313 INFO L482 AbstractCegarLoop]: Abstraction has 2903 states and 8018 transitions. [2021-06-04 21:43:18,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:18,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 8018 transitions. [2021-06-04 21:43:18,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:18,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:18,315 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:18,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:18,516 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:18,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:18,516 INFO L82 PathProgramCache]: Analyzing trace with hash -546339512, now seen corresponding path program 136 times [2021-06-04 21:43:18,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:18,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520932632] [2021-06-04 21:43:18,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:18,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:18,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520932632] [2021-06-04 21:43:18,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520932632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:18,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346389811] [2021-06-04 21:43:18,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:18,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:43:18,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:18,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:18,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:18,886 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:18,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346389811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:18,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:18,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-04 21:43:18,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031590088] [2021-06-04 21:43:18,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:18,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:18,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:18,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:18,887 INFO L87 Difference]: Start difference. First operand 2903 states and 8018 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:19,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:19,312 INFO L93 Difference]: Finished difference Result 4321 states and 11057 transitions. [2021-06-04 21:43:19,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:43:19,313 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:19,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:19,316 INFO L225 Difference]: With dead ends: 4321 [2021-06-04 21:43:19,316 INFO L226 Difference]: Without dead ends: 4051 [2021-06-04 21:43:19,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 446.0ms TimeCoverageRelationStatistics Valid=569, Invalid=1783, Unknown=0, NotChecked=0, Total=2352 [2021-06-04 21:43:19,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-04 21:43:19,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 2978. [2021-06-04 21:43:19,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2978 states, 2977 states have (on average 2.7688948605979173) internal successors, (8243), 2977 states have internal predecessors, (8243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:19,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 8243 transitions. [2021-06-04 21:43:19,346 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 8243 transitions. Word has length 115 [2021-06-04 21:43:19,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:19,346 INFO L482 AbstractCegarLoop]: Abstraction has 2978 states and 8243 transitions. [2021-06-04 21:43:19,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:19,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 8243 transitions. [2021-06-04 21:43:19,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:19,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:19,348 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:19,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-04 21:43:19,548 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:19,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:19,549 INFO L82 PathProgramCache]: Analyzing trace with hash -791416808, now seen corresponding path program 137 times [2021-06-04 21:43:19,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:19,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004106139] [2021-06-04 21:43:19,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:19,738 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:19,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:19,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004106139] [2021-06-04 21:43:19,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004106139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:19,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053804223] [2021-06-04 21:43:19,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:19,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-04 21:43:19,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:19,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:19,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:19,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053804223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:19,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:19,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-04 21:43:19,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068390641] [2021-06-04 21:43:19,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:19,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:19,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:19,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:19,960 INFO L87 Difference]: Start difference. First operand 2978 states and 8243 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:20,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:20,521 INFO L93 Difference]: Finished difference Result 4346 states and 11182 transitions. [2021-06-04 21:43:20,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:43:20,521 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:20,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:20,525 INFO L225 Difference]: With dead ends: 4346 [2021-06-04 21:43:20,525 INFO L226 Difference]: Without dead ends: 4076 [2021-06-04 21:43:20,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 569.5ms TimeCoverageRelationStatistics Valid=593, Invalid=1957, Unknown=0, NotChecked=0, Total=2550 [2021-06-04 21:43:20,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-04 21:43:20,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3053. [2021-06-04 21:43:20,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3052 states have (on average 2.7745740498034075) internal successors, (8468), 3052 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:20,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 8468 transitions. [2021-06-04 21:43:20,556 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 8468 transitions. Word has length 115 [2021-06-04 21:43:20,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:20,556 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 8468 transitions. [2021-06-04 21:43:20,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:20,556 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 8468 transitions. [2021-06-04 21:43:20,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:20,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:20,559 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:20,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:20,781 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:20,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:20,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1168267130, now seen corresponding path program 138 times [2021-06-04 21:43:20,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:20,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657133977] [2021-06-04 21:43:20,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:20,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:20,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:20,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657133977] [2021-06-04 21:43:20,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657133977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:20,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176276643] [2021-06-04 21:43:20,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:21,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-04 21:43:21,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:21,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:21,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:21,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176276643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:21,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:21,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-04 21:43:21,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082330118] [2021-06-04 21:43:21,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:21,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:21,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:21,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:21,150 INFO L87 Difference]: Start difference. First operand 3053 states and 8468 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:21,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:21,607 INFO L93 Difference]: Finished difference Result 4371 states and 11307 transitions. [2021-06-04 21:43:21,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:43:21,607 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:21,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:21,611 INFO L225 Difference]: With dead ends: 4371 [2021-06-04 21:43:21,611 INFO L226 Difference]: Without dead ends: 4101 [2021-06-04 21:43:21,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 466.4ms TimeCoverageRelationStatistics Valid=623, Invalid=1927, Unknown=0, NotChecked=0, Total=2550 [2021-06-04 21:43:21,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4101 states. [2021-06-04 21:43:21,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4101 to 3128. [2021-06-04 21:43:21,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3128 states, 3127 states have (on average 2.7799808122801406) internal successors, (8693), 3127 states have internal predecessors, (8693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:21,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 8693 transitions. [2021-06-04 21:43:21,642 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 8693 transitions. Word has length 115 [2021-06-04 21:43:21,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:21,643 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 8693 transitions. [2021-06-04 21:43:21,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:21,643 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 8693 transitions. [2021-06-04 21:43:21,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:21,645 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:21,645 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:21,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-04 21:43:21,846 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:21,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:21,846 INFO L82 PathProgramCache]: Analyzing trace with hash 158488406, now seen corresponding path program 139 times [2021-06-04 21:43:21,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:21,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542218707] [2021-06-04 21:43:21,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:22,021 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:22,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:22,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542218707] [2021-06-04 21:43:22,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542218707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:22,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593479625] [2021-06-04 21:43:22,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:22,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:22,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:22,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:22,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593479625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:22,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:22,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-04 21:43:22,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725261984] [2021-06-04 21:43:22,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:22,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:22,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:22,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:22,232 INFO L87 Difference]: Start difference. First operand 3128 states and 8693 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:22,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:22,815 INFO L93 Difference]: Finished difference Result 4396 states and 11432 transitions. [2021-06-04 21:43:22,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:43:22,815 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:22,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:22,819 INFO L225 Difference]: With dead ends: 4396 [2021-06-04 21:43:22,819 INFO L226 Difference]: Without dead ends: 4126 [2021-06-04 21:43:22,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 583.2ms TimeCoverageRelationStatistics Valid=649, Invalid=2107, Unknown=0, NotChecked=0, Total=2756 [2021-06-04 21:43:22,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-04 21:43:22,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 3203. [2021-06-04 21:43:22,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3202 states have (on average 2.7851342910680823) internal successors, (8918), 3202 states have internal predecessors, (8918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:22,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8918 transitions. [2021-06-04 21:43:22,850 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8918 transitions. Word has length 115 [2021-06-04 21:43:22,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:22,851 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8918 transitions. [2021-06-04 21:43:22,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:22,851 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8918 transitions. [2021-06-04 21:43:22,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:22,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:22,853 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:23,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-04 21:43:23,053 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:23,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:23,054 INFO L82 PathProgramCache]: Analyzing trace with hash 612704580, now seen corresponding path program 140 times [2021-06-04 21:43:23,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:23,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864669866] [2021-06-04 21:43:23,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:23,212 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:23,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:23,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864669866] [2021-06-04 21:43:23,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864669866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:23,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899860342] [2021-06-04 21:43:23,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:23,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:43:23,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:23,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:23,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:23,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899860342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:23,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:23,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-04 21:43:23,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003039201] [2021-06-04 21:43:23,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:23,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:23,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:23,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:23,409 INFO L87 Difference]: Start difference. First operand 3203 states and 8918 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:23,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:23,926 INFO L93 Difference]: Finished difference Result 4421 states and 11557 transitions. [2021-06-04 21:43:23,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:43:23,926 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:23,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:23,930 INFO L225 Difference]: With dead ends: 4421 [2021-06-04 21:43:23,930 INFO L226 Difference]: Without dead ends: 4151 [2021-06-04 21:43:23,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 502.5ms TimeCoverageRelationStatistics Valid=693, Invalid=2063, Unknown=0, NotChecked=0, Total=2756 [2021-06-04 21:43:23,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-06-04 21:43:23,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3278. [2021-06-04 21:43:23,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3278 states, 3277 states have (on average 2.790051876716509) internal successors, (9143), 3277 states have internal predecessors, (9143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:23,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 9143 transitions. [2021-06-04 21:43:23,962 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 9143 transitions. Word has length 115 [2021-06-04 21:43:23,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:23,963 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 9143 transitions. [2021-06-04 21:43:23,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:23,963 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 9143 transitions. [2021-06-04 21:43:23,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:23,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:23,965 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:24,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:24,169 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:24,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:24,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1611600916, now seen corresponding path program 141 times [2021-06-04 21:43:24,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:24,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401447687] [2021-06-04 21:43:24,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:24,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:24,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401447687] [2021-06-04 21:43:24,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401447687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:24,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212430037] [2021-06-04 21:43:24,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:24,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-04 21:43:24,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:24,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:24,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:24,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212430037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:24,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:24,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-04 21:43:24,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128881035] [2021-06-04 21:43:24,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:24,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:24,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:24,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:24,564 INFO L87 Difference]: Start difference. First operand 3278 states and 9143 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:25,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:25,194 INFO L93 Difference]: Finished difference Result 4446 states and 11682 transitions. [2021-06-04 21:43:25,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:43:25,195 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:25,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:25,199 INFO L225 Difference]: With dead ends: 4446 [2021-06-04 21:43:25,199 INFO L226 Difference]: Without dead ends: 4176 [2021-06-04 21:43:25,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 607.7ms TimeCoverageRelationStatistics Valid=721, Invalid=2249, Unknown=0, NotChecked=0, Total=2970 [2021-06-04 21:43:25,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-04 21:43:25,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3353. [2021-06-04 21:43:25,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 2.7947494033412887) internal successors, (9368), 3352 states have internal predecessors, (9368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:25,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9368 transitions. [2021-06-04 21:43:25,233 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9368 transitions. Word has length 115 [2021-06-04 21:43:25,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:25,233 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9368 transitions. [2021-06-04 21:43:25,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:25,234 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9368 transitions. [2021-06-04 21:43:25,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:25,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:25,236 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:25,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-04 21:43:25,436 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:25,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:25,438 INFO L82 PathProgramCache]: Analyzing trace with hash -267726974, now seen corresponding path program 142 times [2021-06-04 21:43:25,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:25,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597486756] [2021-06-04 21:43:25,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:25,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:25,594 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:25,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:25,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597486756] [2021-06-04 21:43:25,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597486756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:25,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925879753] [2021-06-04 21:43:25,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:25,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:43:25,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:25,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:25,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:25,786 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:25,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925879753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:25,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:25,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-04 21:43:25,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791978693] [2021-06-04 21:43:25,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:25,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:25,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:25,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:25,787 INFO L87 Difference]: Start difference. First operand 3353 states and 9368 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:26,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:26,335 INFO L93 Difference]: Finished difference Result 4471 states and 11807 transitions. [2021-06-04 21:43:26,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:43:26,335 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:26,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:26,338 INFO L225 Difference]: With dead ends: 4471 [2021-06-04 21:43:26,338 INFO L226 Difference]: Without dead ends: 4201 [2021-06-04 21:43:26,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 533.5ms TimeCoverageRelationStatistics Valid=779, Invalid=2191, Unknown=0, NotChecked=0, Total=2970 [2021-06-04 21:43:26,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-06-04 21:43:26,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 3428. [2021-06-04 21:43:26,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.7992413189378467) internal successors, (9593), 3427 states have internal predecessors, (9593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:26,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9593 transitions. [2021-06-04 21:43:26,372 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9593 transitions. Word has length 115 [2021-06-04 21:43:26,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:26,372 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9593 transitions. [2021-06-04 21:43:26,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:26,372 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9593 transitions. [2021-06-04 21:43:26,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:26,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:26,375 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:26,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:26,575 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:26,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:26,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1762592338, now seen corresponding path program 143 times [2021-06-04 21:43:26,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:26,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100830006] [2021-06-04 21:43:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:26,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:26,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100830006] [2021-06-04 21:43:26,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100830006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:26,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338270162] [2021-06-04 21:43:26,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:26,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-04 21:43:26,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:26,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:26,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:26,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338270162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:26,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:26,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-04 21:43:26,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168277625] [2021-06-04 21:43:26,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:26,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:26,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:26,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:26,938 INFO L87 Difference]: Start difference. First operand 3428 states and 9593 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:27,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:27,615 INFO L93 Difference]: Finished difference Result 4496 states and 11932 transitions. [2021-06-04 21:43:27,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:43:27,615 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:27,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:27,619 INFO L225 Difference]: With dead ends: 4496 [2021-06-04 21:43:27,619 INFO L226 Difference]: Without dead ends: 4226 [2021-06-04 21:43:27,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 645.9ms TimeCoverageRelationStatistics Valid=809, Invalid=2383, Unknown=0, NotChecked=0, Total=3192 [2021-06-04 21:43:27,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-04 21:43:27,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3503. [2021-06-04 21:43:27,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.803540833809252) internal successors, (9818), 3502 states have internal predecessors, (9818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:27,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9818 transitions. [2021-06-04 21:43:27,654 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9818 transitions. Word has length 115 [2021-06-04 21:43:27,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:27,654 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9818 transitions. [2021-06-04 21:43:27,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:27,654 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9818 transitions. [2021-06-04 21:43:27,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:27,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:27,657 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:27,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:27,857 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:27,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:27,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1918135488, now seen corresponding path program 144 times [2021-06-04 21:43:27,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:27,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700837604] [2021-06-04 21:43:27,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:28,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:28,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700837604] [2021-06-04 21:43:28,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700837604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:28,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452265375] [2021-06-04 21:43:28,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:28,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-04 21:43:28,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:28,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:28,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:28,214 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:28,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452265375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:28,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:28,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-04 21:43:28,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652657032] [2021-06-04 21:43:28,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:28,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:28,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:28,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:28,215 INFO L87 Difference]: Start difference. First operand 3503 states and 9818 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:28,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:28,798 INFO L93 Difference]: Finished difference Result 4566 states and 12177 transitions. [2021-06-04 21:43:28,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:43:28,798 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:28,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:28,802 INFO L225 Difference]: With dead ends: 4566 [2021-06-04 21:43:28,802 INFO L226 Difference]: Without dead ends: 4296 [2021-06-04 21:43:28,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 544.4ms TimeCoverageRelationStatistics Valid=881, Invalid=2311, Unknown=0, NotChecked=0, Total=3192 [2021-06-04 21:43:28,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2021-06-04 21:43:28,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 3578. [2021-06-04 21:43:28,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 2.8118535085266982) internal successors, (10058), 3577 states have internal predecessors, (10058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:28,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 10058 transitions. [2021-06-04 21:43:28,837 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 10058 transitions. Word has length 115 [2021-06-04 21:43:28,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:28,838 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 10058 transitions. [2021-06-04 21:43:28,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:28,838 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 10058 transitions. [2021-06-04 21:43:28,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:28,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:28,840 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:29,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:29,041 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:29,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:29,041 INFO L82 PathProgramCache]: Analyzing trace with hash 661589520, now seen corresponding path program 145 times [2021-06-04 21:43:29,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:29,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371706207] [2021-06-04 21:43:29,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:29,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:29,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371706207] [2021-06-04 21:43:29,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371706207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:29,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585423867] [2021-06-04 21:43:29,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:29,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:29,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:29,425 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:29,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585423867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:29,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:29,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-04 21:43:29,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982769563] [2021-06-04 21:43:29,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:29,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:29,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:29,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:29,426 INFO L87 Difference]: Start difference. First operand 3578 states and 10058 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:30,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:30,198 INFO L93 Difference]: Finished difference Result 5144 states and 13803 transitions. [2021-06-04 21:43:30,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:43:30,198 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:30,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:30,202 INFO L225 Difference]: With dead ends: 5144 [2021-06-04 21:43:30,202 INFO L226 Difference]: Without dead ends: 4521 [2021-06-04 21:43:30,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 738.3ms TimeCoverageRelationStatistics Valid=934, Invalid=2726, Unknown=0, NotChecked=0, Total=3660 [2021-06-04 21:43:30,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2021-06-04 21:43:30,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 3653. [2021-06-04 21:43:30,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 2.8170865279299013) internal successors, (10288), 3652 states have internal predecessors, (10288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:30,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10288 transitions. [2021-06-04 21:43:30,256 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10288 transitions. Word has length 115 [2021-06-04 21:43:30,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:30,256 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10288 transitions. [2021-06-04 21:43:30,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:30,256 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10288 transitions. [2021-06-04 21:43:30,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:30,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:30,259 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:30,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:30,460 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:30,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:30,460 INFO L82 PathProgramCache]: Analyzing trace with hash -371058082, now seen corresponding path program 146 times [2021-06-04 21:43:30,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:30,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767120886] [2021-06-04 21:43:30,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:30,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:30,634 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:30,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:30,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767120886] [2021-06-04 21:43:30,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767120886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:30,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794048224] [2021-06-04 21:43:30,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:30,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:43:30,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:30,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:30,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:30,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794048224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:30,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:30,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-04 21:43:30,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127405936] [2021-06-04 21:43:30,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:30,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:30,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:30,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:30,842 INFO L87 Difference]: Start difference. First operand 3653 states and 10288 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:31,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:31,488 INFO L93 Difference]: Finished difference Result 5348 states and 14471 transitions. [2021-06-04 21:43:31,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:43:31,488 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:31,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:31,493 INFO L225 Difference]: With dead ends: 5348 [2021-06-04 21:43:31,493 INFO L226 Difference]: Without dead ends: 5078 [2021-06-04 21:43:31,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 613.5ms TimeCoverageRelationStatistics Valid=1000, Invalid=2422, Unknown=0, NotChecked=0, Total=3422 [2021-06-04 21:43:31,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5078 states. [2021-06-04 21:43:31,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5078 to 3833. [2021-06-04 21:43:31,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 2.8306367432150314) internal successors, (10847), 3832 states have internal predecessors, (10847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:31,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 10847 transitions. [2021-06-04 21:43:31,532 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 10847 transitions. Word has length 115 [2021-06-04 21:43:31,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:31,533 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 10847 transitions. [2021-06-04 21:43:31,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:31,533 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 10847 transitions. [2021-06-04 21:43:31,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:31,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:31,535 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:31,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-06-04 21:43:31,736 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:31,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:31,736 INFO L82 PathProgramCache]: Analyzing trace with hash -348714832, now seen corresponding path program 147 times [2021-06-04 21:43:31,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:31,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672414648] [2021-06-04 21:43:31,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:31,918 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:31,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:31,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672414648] [2021-06-04 21:43:31,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672414648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:31,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209023643] [2021-06-04 21:43:31,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:32,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-04 21:43:32,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:32,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:32,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:32,184 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:32,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209023643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:32,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:32,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-04 21:43:32,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605872161] [2021-06-04 21:43:32,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:32,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:32,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:32,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:32,185 INFO L87 Difference]: Start difference. First operand 3833 states and 10847 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:33,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:33,006 INFO L93 Difference]: Finished difference Result 5216 states and 14136 transitions. [2021-06-04 21:43:33,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:43:33,007 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-04 21:43:33,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:33,011 INFO L225 Difference]: With dead ends: 5216 [2021-06-04 21:43:33,011 INFO L226 Difference]: Without dead ends: 4641 [2021-06-04 21:43:33,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 806.1ms TimeCoverageRelationStatistics Valid=1100, Invalid=3060, Unknown=0, NotChecked=0, Total=4160 [2021-06-04 21:43:33,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2021-06-04 21:43:33,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 2524. [2021-06-04 21:43:33,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2524 states, 2523 states have (on average 2.737217598097503) internal successors, (6906), 2523 states have internal predecessors, (6906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:33,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 6906 transitions. [2021-06-04 21:43:33,038 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 6906 transitions. Word has length 115 [2021-06-04 21:43:33,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:33,038 INFO L482 AbstractCegarLoop]: Abstraction has 2524 states and 6906 transitions. [2021-06-04 21:43:33,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:33,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 6906 transitions. [2021-06-04 21:43:33,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:33,040 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:33,040 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:33,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-04 21:43:33,240 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:33,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:33,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1146705884, now seen corresponding path program 148 times [2021-06-04 21:43:33,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:33,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494216874] [2021-06-04 21:43:33,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:33,454 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:33,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:33,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494216874] [2021-06-04 21:43:33,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494216874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:33,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590005538] [2021-06-04 21:43:33,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:33,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:43:33,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:33,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:43:33,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:33,779 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:33,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590005538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:33,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:33,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 27 [2021-06-04 21:43:33,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235260295] [2021-06-04 21:43:33,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-04 21:43:33,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:33,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-04 21:43:33,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:43:33,780 INFO L87 Difference]: Start difference. First operand 2524 states and 6906 transitions. Second operand has 27 states, 27 states have (on average 5.555555555555555) internal successors, (150), 27 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:34,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:34,214 INFO L93 Difference]: Finished difference Result 3614 states and 9406 transitions. [2021-06-04 21:43:34,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:43:34,214 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.555555555555555) internal successors, (150), 27 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:34,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:34,218 INFO L225 Difference]: With dead ends: 3614 [2021-06-04 21:43:34,218 INFO L226 Difference]: Without dead ends: 3280 [2021-06-04 21:43:34,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 520.2ms TimeCoverageRelationStatistics Valid=680, Invalid=1870, Unknown=0, NotChecked=0, Total=2550 [2021-06-04 21:43:34,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-06-04 21:43:34,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2609. [2021-06-04 21:43:34,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2609 states, 2608 states have (on average 2.71319018404908) internal successors, (7076), 2608 states have internal predecessors, (7076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:34,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2609 states to 2609 states and 7076 transitions. [2021-06-04 21:43:34,240 INFO L78 Accepts]: Start accepts. Automaton has 2609 states and 7076 transitions. Word has length 120 [2021-06-04 21:43:34,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:34,240 INFO L482 AbstractCegarLoop]: Abstraction has 2609 states and 7076 transitions. [2021-06-04 21:43:34,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.555555555555555) internal successors, (150), 27 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:34,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2609 states and 7076 transitions. [2021-06-04 21:43:34,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:34,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:34,242 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:34,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-04 21:43:34,443 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:34,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:34,443 INFO L82 PathProgramCache]: Analyzing trace with hash 51245472, now seen corresponding path program 149 times [2021-06-04 21:43:34,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:34,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090540569] [2021-06-04 21:43:34,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:34,666 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:34,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:34,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090540569] [2021-06-04 21:43:34,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090540569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:34,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731486498] [2021-06-04 21:43:34,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:34,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-04 21:43:34,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:34,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:34,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:34,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731486498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:34,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:34,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-04 21:43:34,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142373001] [2021-06-04 21:43:34,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:34,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:34,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:34,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:34,896 INFO L87 Difference]: Start difference. First operand 2609 states and 7076 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:35,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:35,245 INFO L93 Difference]: Finished difference Result 4436 states and 10987 transitions. [2021-06-04 21:43:35,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:43:35,245 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:35,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:35,249 INFO L225 Difference]: With dead ends: 4436 [2021-06-04 21:43:35,249 INFO L226 Difference]: Without dead ends: 4166 [2021-06-04 21:43:35,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 448.4ms TimeCoverageRelationStatistics Valid=543, Invalid=1437, Unknown=0, NotChecked=0, Total=1980 [2021-06-04 21:43:35,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2021-06-04 21:43:35,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 2753. [2021-06-04 21:43:35,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 2.722747093023256) internal successors, (7493), 2752 states have internal predecessors, (7493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:35,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7493 transitions. [2021-06-04 21:43:35,275 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7493 transitions. Word has length 120 [2021-06-04 21:43:35,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:35,275 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7493 transitions. [2021-06-04 21:43:35,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:35,275 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7493 transitions. [2021-06-04 21:43:35,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:35,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:35,277 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:35,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-04 21:43:35,478 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:35,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:35,478 INFO L82 PathProgramCache]: Analyzing trace with hash -847277968, now seen corresponding path program 150 times [2021-06-04 21:43:35,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:35,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545435144] [2021-06-04 21:43:35,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:35,706 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:35,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:35,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545435144] [2021-06-04 21:43:35,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545435144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:35,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383113256] [2021-06-04 21:43:35,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:35,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-04 21:43:35,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:35,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:35,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:35,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383113256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:35,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:35,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-04 21:43:35,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585405229] [2021-06-04 21:43:35,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:43:35,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:35,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:43:35,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:43:35,955 INFO L87 Difference]: Start difference. First operand 2753 states and 7493 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:36,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:36,384 INFO L93 Difference]: Finished difference Result 4396 states and 10982 transitions. [2021-06-04 21:43:36,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:43:36,384 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:36,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:36,388 INFO L225 Difference]: With dead ends: 4396 [2021-06-04 21:43:36,388 INFO L226 Difference]: Without dead ends: 4126 [2021-06-04 21:43:36,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 530.9ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-04 21:43:36,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-04 21:43:36,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 2828. [2021-06-04 21:43:36,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 2.73010258224266) internal successors, (7718), 2827 states have internal predecessors, (7718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:36,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7718 transitions. [2021-06-04 21:43:36,415 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7718 transitions. Word has length 120 [2021-06-04 21:43:36,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:36,415 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7718 transitions. [2021-06-04 21:43:36,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:36,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7718 transitions. [2021-06-04 21:43:36,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:36,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:36,433 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:36,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-04 21:43:36,634 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:36,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:36,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1832735838, now seen corresponding path program 151 times [2021-06-04 21:43:36,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:36,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732345362] [2021-06-04 21:43:36,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:36,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:36,875 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:36,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:36,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732345362] [2021-06-04 21:43:36,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732345362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:36,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774487131] [2021-06-04 21:43:36,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:36,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:36,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:36,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:37,142 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:37,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774487131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:37,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:37,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-04 21:43:37,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924290385] [2021-06-04 21:43:37,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:37,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:37,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:37,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:37,143 INFO L87 Difference]: Start difference. First operand 2828 states and 7718 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:37,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:37,557 INFO L93 Difference]: Finished difference Result 4446 states and 11157 transitions. [2021-06-04 21:43:37,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-04 21:43:37,557 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:37,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:37,561 INFO L225 Difference]: With dead ends: 4446 [2021-06-04 21:43:37,561 INFO L226 Difference]: Without dead ends: 4176 [2021-06-04 21:43:37,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 505.2ms TimeCoverageRelationStatistics Valid=549, Invalid=1613, Unknown=0, NotChecked=0, Total=2162 [2021-06-04 21:43:37,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-04 21:43:37,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 2903. [2021-06-04 21:43:37,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2903 states, 2902 states have (on average 2.7370778773259823) internal successors, (7943), 2902 states have internal predecessors, (7943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:37,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 7943 transitions. [2021-06-04 21:43:37,590 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 7943 transitions. Word has length 120 [2021-06-04 21:43:37,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:37,590 INFO L482 AbstractCegarLoop]: Abstraction has 2903 states and 7943 transitions. [2021-06-04 21:43:37,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:37,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 7943 transitions. [2021-06-04 21:43:37,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:37,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:37,592 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:37,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-04 21:43:37,792 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:37,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:37,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1452291886, now seen corresponding path program 152 times [2021-06-04 21:43:37,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:37,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762754795] [2021-06-04 21:43:37,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:37,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:38,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:38,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762754795] [2021-06-04 21:43:38,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762754795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:38,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962961167] [2021-06-04 21:43:38,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:38,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:43:38,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:38,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:38,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:38,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962961167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:38,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:38,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-04 21:43:38,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440728920] [2021-06-04 21:43:38,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:43:38,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:38,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:43:38,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:43:38,260 INFO L87 Difference]: Start difference. First operand 2903 states and 7943 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:38,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:38,768 INFO L93 Difference]: Finished difference Result 4471 states and 11282 transitions. [2021-06-04 21:43:38,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:43:38,768 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:38,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:38,772 INFO L225 Difference]: With dead ends: 4471 [2021-06-04 21:43:38,772 INFO L226 Difference]: Without dead ends: 4201 [2021-06-04 21:43:38,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 573.5ms TimeCoverageRelationStatistics Valid=622, Invalid=1928, Unknown=0, NotChecked=0, Total=2550 [2021-06-04 21:43:38,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-06-04 21:43:38,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 2978. [2021-06-04 21:43:38,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2978 states, 2977 states have (on average 2.7437017131340276) internal successors, (8168), 2977 states have internal predecessors, (8168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:38,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 8168 transitions. [2021-06-04 21:43:38,803 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 8168 transitions. Word has length 120 [2021-06-04 21:43:38,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:38,803 INFO L482 AbstractCegarLoop]: Abstraction has 2978 states and 8168 transitions. [2021-06-04 21:43:38,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:38,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 8168 transitions. [2021-06-04 21:43:38,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:38,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:38,805 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:39,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:39,006 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:39,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:39,006 INFO L82 PathProgramCache]: Analyzing trace with hash 2076667036, now seen corresponding path program 153 times [2021-06-04 21:43:39,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:39,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094214236] [2021-06-04 21:43:39,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:39,214 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:39,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:39,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094214236] [2021-06-04 21:43:39,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094214236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:39,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49686583] [2021-06-04 21:43:39,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:39,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-04 21:43:39,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:39,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:39,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:39,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49686583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:39,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:39,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-04 21:43:39,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96364306] [2021-06-04 21:43:39,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:39,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:39,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:39,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:39,445 INFO L87 Difference]: Start difference. First operand 2978 states and 8168 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:39,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:39,893 INFO L93 Difference]: Finished difference Result 4496 states and 11407 transitions. [2021-06-04 21:43:39,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:43:39,894 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:39,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:39,897 INFO L225 Difference]: With dead ends: 4496 [2021-06-04 21:43:39,898 INFO L226 Difference]: Without dead ends: 4226 [2021-06-04 21:43:39,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 493.6ms TimeCoverageRelationStatistics Valid=571, Invalid=1781, Unknown=0, NotChecked=0, Total=2352 [2021-06-04 21:43:39,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-04 21:43:39,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3053. [2021-06-04 21:43:39,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3052 states have (on average 2.75) internal successors, (8393), 3052 states have internal predecessors, (8393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:39,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 8393 transitions. [2021-06-04 21:43:39,927 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 8393 transitions. Word has length 120 [2021-06-04 21:43:39,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:39,927 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 8393 transitions. [2021-06-04 21:43:39,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:39,927 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 8393 transitions. [2021-06-04 21:43:39,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:39,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:39,929 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:40,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:40,131 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:40,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:40,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1409248404, now seen corresponding path program 154 times [2021-06-04 21:43:40,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:40,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220685499] [2021-06-04 21:43:40,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:40,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:40,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:40,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220685499] [2021-06-04 21:43:40,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220685499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:40,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347763953] [2021-06-04 21:43:40,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:40,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:43:40,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:40,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:40,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:40,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347763953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:40,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:40,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-04 21:43:40,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479919261] [2021-06-04 21:43:40,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:43:40,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:40,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:43:40,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:43:40,570 INFO L87 Difference]: Start difference. First operand 3053 states and 8393 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:41,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:41,134 INFO L93 Difference]: Finished difference Result 4521 states and 11532 transitions. [2021-06-04 21:43:41,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:43:41,135 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:41,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:41,138 INFO L225 Difference]: With dead ends: 4521 [2021-06-04 21:43:41,138 INFO L226 Difference]: Without dead ends: 4251 [2021-06-04 21:43:41,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 585.2ms TimeCoverageRelationStatistics Valid=652, Invalid=2104, Unknown=0, NotChecked=0, Total=2756 [2021-06-04 21:43:41,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-06-04 21:43:41,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 3128. [2021-06-04 21:43:41,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3128 states, 3127 states have (on average 2.7559961624560283) internal successors, (8618), 3127 states have internal predecessors, (8618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:41,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 8618 transitions. [2021-06-04 21:43:41,172 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 8618 transitions. Word has length 120 [2021-06-04 21:43:41,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:41,172 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 8618 transitions. [2021-06-04 21:43:41,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:41,172 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 8618 transitions. [2021-06-04 21:43:41,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:41,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:41,174 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:41,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:41,374 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:41,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:41,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1493768794, now seen corresponding path program 155 times [2021-06-04 21:43:41,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:41,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161761280] [2021-06-04 21:43:41,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:41,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:41,556 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:41,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:41,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161761280] [2021-06-04 21:43:41,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161761280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:41,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625320519] [2021-06-04 21:43:41,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:41,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-04 21:43:41,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:41,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:41,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:41,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625320519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:41,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:41,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-04 21:43:41,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513307772] [2021-06-04 21:43:41,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:41,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:41,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:41,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:41,775 INFO L87 Difference]: Start difference. First operand 3128 states and 8618 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:42,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:42,240 INFO L93 Difference]: Finished difference Result 4546 states and 11657 transitions. [2021-06-04 21:43:42,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:43:42,241 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:42,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:42,245 INFO L225 Difference]: With dead ends: 4546 [2021-06-04 21:43:42,245 INFO L226 Difference]: Without dead ends: 4276 [2021-06-04 21:43:42,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 497.0ms TimeCoverageRelationStatistics Valid=609, Invalid=1941, Unknown=0, NotChecked=0, Total=2550 [2021-06-04 21:43:42,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2021-06-04 21:43:42,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 3203. [2021-06-04 21:43:42,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3202 states have (on average 2.7617114303560273) internal successors, (8843), 3202 states have internal predecessors, (8843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:42,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8843 transitions. [2021-06-04 21:43:42,278 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8843 transitions. Word has length 120 [2021-06-04 21:43:42,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:42,279 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8843 transitions. [2021-06-04 21:43:42,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:42,279 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8843 transitions. [2021-06-04 21:43:42,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:42,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:42,281 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:42,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:42,481 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:42,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:42,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1248691498, now seen corresponding path program 156 times [2021-06-04 21:43:42,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:42,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714352568] [2021-06-04 21:43:42,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:42,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:42,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714352568] [2021-06-04 21:43:42,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714352568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:42,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089909746] [2021-06-04 21:43:42,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:42,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-04 21:43:42,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:42,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:42,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:42,943 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:42,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089909746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:42,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:42,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-04 21:43:42,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404002177] [2021-06-04 21:43:42,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:43:42,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:42,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:43:42,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:43:42,945 INFO L87 Difference]: Start difference. First operand 3203 states and 8843 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:43,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:43,596 INFO L93 Difference]: Finished difference Result 4571 states and 11782 transitions. [2021-06-04 21:43:43,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:43:43,597 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:43,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:43,602 INFO L225 Difference]: With dead ends: 4571 [2021-06-04 21:43:43,602 INFO L226 Difference]: Without dead ends: 4301 [2021-06-04 21:43:43,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 648.0ms TimeCoverageRelationStatistics Valid=698, Invalid=2272, Unknown=0, NotChecked=0, Total=2970 [2021-06-04 21:43:43,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4301 states. [2021-06-04 21:43:43,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4301 to 3278. [2021-06-04 21:43:43,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3278 states, 3277 states have (on average 2.767165090021361) internal successors, (9068), 3277 states have internal predecessors, (9068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:43,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 9068 transitions. [2021-06-04 21:43:43,649 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 9068 transitions. Word has length 120 [2021-06-04 21:43:43,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:43,649 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 9068 transitions. [2021-06-04 21:43:43,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:43,650 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 9068 transitions. [2021-06-04 21:43:43,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:43,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:43,652 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:43,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:43,869 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:43,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:43,869 INFO L82 PathProgramCache]: Analyzing trace with hash 871841176, now seen corresponding path program 157 times [2021-06-04 21:43:43,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:43,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681283986] [2021-06-04 21:43:43,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:43,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:44,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:44,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681283986] [2021-06-04 21:43:44,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681283986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:44,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906124457] [2021-06-04 21:43:44,044 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:44,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:44,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:44,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906124457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:44,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:44,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-04 21:43:44,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20552484] [2021-06-04 21:43:44,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:44,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:44,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:44,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:44,257 INFO L87 Difference]: Start difference. First operand 3278 states and 9068 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:44,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:44,801 INFO L93 Difference]: Finished difference Result 4596 states and 11907 transitions. [2021-06-04 21:43:44,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:43:44,801 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:44,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:44,805 INFO L225 Difference]: With dead ends: 4596 [2021-06-04 21:43:44,805 INFO L226 Difference]: Without dead ends: 4326 [2021-06-04 21:43:44,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 535.6ms TimeCoverageRelationStatistics Valid=663, Invalid=2093, Unknown=0, NotChecked=0, Total=2756 [2021-06-04 21:43:44,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-06-04 21:43:44,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3353. [2021-06-04 21:43:44,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 2.7723747016706444) internal successors, (9293), 3352 states have internal predecessors, (9293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:44,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9293 transitions. [2021-06-04 21:43:44,837 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9293 transitions. Word has length 120 [2021-06-04 21:43:44,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:44,838 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9293 transitions. [2021-06-04 21:43:44,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:44,838 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9293 transitions. [2021-06-04 21:43:44,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:44,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:44,840 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:45,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:45,040 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:45,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:45,041 INFO L82 PathProgramCache]: Analyzing trace with hash -2096370584, now seen corresponding path program 158 times [2021-06-04 21:43:45,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:45,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362784351] [2021-06-04 21:43:45,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:45,221 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:45,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:45,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362784351] [2021-06-04 21:43:45,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362784351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:45,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095676225] [2021-06-04 21:43:45,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:45,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:43:45,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:45,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:45,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:45,452 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:45,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095676225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:45,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:45,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-04 21:43:45,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143568809] [2021-06-04 21:43:45,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:43:45,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:45,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:43:45,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:43:45,454 INFO L87 Difference]: Start difference. First operand 3353 states and 9293 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:46,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:46,096 INFO L93 Difference]: Finished difference Result 4621 states and 12032 transitions. [2021-06-04 21:43:46,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:43:46,097 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:46,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:46,101 INFO L225 Difference]: With dead ends: 4621 [2021-06-04 21:43:46,101 INFO L226 Difference]: Without dead ends: 4351 [2021-06-04 21:43:46,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 656.6ms TimeCoverageRelationStatistics Valid=760, Invalid=2432, Unknown=0, NotChecked=0, Total=3192 [2021-06-04 21:43:46,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4351 states. [2021-06-04 21:43:46,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4351 to 3428. [2021-06-04 21:43:46,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.7773562882988037) internal successors, (9518), 3427 states have internal predecessors, (9518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:46,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9518 transitions. [2021-06-04 21:43:46,135 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9518 transitions. Word has length 120 [2021-06-04 21:43:46,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:46,135 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9518 transitions. [2021-06-04 21:43:46,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:46,135 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9518 transitions. [2021-06-04 21:43:46,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:46,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:46,138 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:46,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:46,341 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:46,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:46,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1642154410, now seen corresponding path program 159 times [2021-06-04 21:43:46,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:46,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728116034] [2021-06-04 21:43:46,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:46,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:46,524 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:46,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:46,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728116034] [2021-06-04 21:43:46,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728116034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:46,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993193671] [2021-06-04 21:43:46,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:46,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-04 21:43:46,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:46,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:46,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:46,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993193671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:46,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:46,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-04 21:43:46,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245910215] [2021-06-04 21:43:46,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:46,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:46,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:46,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:46,788 INFO L87 Difference]: Start difference. First operand 3428 states and 9518 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:47,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:47,364 INFO L93 Difference]: Finished difference Result 4646 states and 12157 transitions. [2021-06-04 21:43:47,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:43:47,364 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:47,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:47,368 INFO L225 Difference]: With dead ends: 4646 [2021-06-04 21:43:47,368 INFO L226 Difference]: Without dead ends: 4376 [2021-06-04 21:43:47,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 554.0ms TimeCoverageRelationStatistics Valid=733, Invalid=2237, Unknown=0, NotChecked=0, Total=2970 [2021-06-04 21:43:47,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4376 states. [2021-06-04 21:43:47,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4376 to 3503. [2021-06-04 21:43:47,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.7821245002855512) internal successors, (9743), 3502 states have internal predecessors, (9743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:47,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9743 transitions. [2021-06-04 21:43:47,415 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9743 transitions. Word has length 120 [2021-06-04 21:43:47,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:47,415 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9743 transitions. [2021-06-04 21:43:47,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:47,416 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9743 transitions. [2021-06-04 21:43:47,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:47,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:47,418 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:47,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-04 21:43:47,619 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:47,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:47,619 INFO L82 PathProgramCache]: Analyzing trace with hash -643258074, now seen corresponding path program 160 times [2021-06-04 21:43:47,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:47,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494098366] [2021-06-04 21:43:47,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:47,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:47,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494098366] [2021-06-04 21:43:47,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494098366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:47,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977623427] [2021-06-04 21:43:47,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:47,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:43:47,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:47,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:47,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:48,023 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:48,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977623427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:48,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:48,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-04 21:43:48,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582226150] [2021-06-04 21:43:48,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:43:48,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:48,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:43:48,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:43:48,024 INFO L87 Difference]: Start difference. First operand 3503 states and 9743 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:48,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:48,762 INFO L93 Difference]: Finished difference Result 4671 states and 12282 transitions. [2021-06-04 21:43:48,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:43:48,763 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:48,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:48,766 INFO L225 Difference]: With dead ends: 4671 [2021-06-04 21:43:48,766 INFO L226 Difference]: Without dead ends: 4401 [2021-06-04 21:43:48,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 713.8ms TimeCoverageRelationStatistics Valid=838, Invalid=2584, Unknown=0, NotChecked=0, Total=3422 [2021-06-04 21:43:48,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-06-04 21:43:48,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 3578. [2021-06-04 21:43:48,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 2.786692759295499) internal successors, (9968), 3577 states have internal predecessors, (9968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 9968 transitions. [2021-06-04 21:43:48,800 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 9968 transitions. Word has length 120 [2021-06-04 21:43:48,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:48,800 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 9968 transitions. [2021-06-04 21:43:48,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:48,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 9968 transitions. [2021-06-04 21:43:48,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:48,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:48,803 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:49,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-04 21:43:49,003 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:49,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:49,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1772381332, now seen corresponding path program 161 times [2021-06-04 21:43:49,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:49,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066146471] [2021-06-04 21:43:49,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:49,170 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:49,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:49,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066146471] [2021-06-04 21:43:49,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066146471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:49,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967984921] [2021-06-04 21:43:49,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:49,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-04 21:43:49,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:49,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:49,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:49,384 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:49,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967984921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:49,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:49,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-04 21:43:49,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091136962] [2021-06-04 21:43:49,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:49,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:49,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:49,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:49,385 INFO L87 Difference]: Start difference. First operand 3578 states and 9968 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:49,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:49,987 INFO L93 Difference]: Finished difference Result 4696 states and 12407 transitions. [2021-06-04 21:43:49,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:43:49,988 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:49,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:49,992 INFO L225 Difference]: With dead ends: 4696 [2021-06-04 21:43:49,992 INFO L226 Difference]: Without dead ends: 4426 [2021-06-04 21:43:49,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 574.4ms TimeCoverageRelationStatistics Valid=819, Invalid=2373, Unknown=0, NotChecked=0, Total=3192 [2021-06-04 21:43:49,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2021-06-04 21:43:50,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 3653. [2021-06-04 21:43:50,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 2.7910733844468782) internal successors, (10193), 3652 states have internal predecessors, (10193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:50,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10193 transitions. [2021-06-04 21:43:50,034 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10193 transitions. Word has length 120 [2021-06-04 21:43:50,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:50,034 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10193 transitions. [2021-06-04 21:43:50,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:50,034 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10193 transitions. [2021-06-04 21:43:50,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:50,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:50,037 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:50,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-04 21:43:50,237 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:50,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:50,238 INFO L82 PathProgramCache]: Analyzing trace with hash -492266652, now seen corresponding path program 162 times [2021-06-04 21:43:50,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:50,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003709117] [2021-06-04 21:43:50,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:50,410 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:50,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:50,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003709117] [2021-06-04 21:43:50,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003709117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:50,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250242483] [2021-06-04 21:43:50,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:50,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-04 21:43:50,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:50,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:50,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:50,646 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:50,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250242483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:50,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:50,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-04 21:43:50,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097057690] [2021-06-04 21:43:50,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:43:50,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:50,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:43:50,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:43:50,647 INFO L87 Difference]: Start difference. First operand 3653 states and 10193 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:51,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:51,428 INFO L93 Difference]: Finished difference Result 4721 states and 12532 transitions. [2021-06-04 21:43:51,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:43:51,428 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:51,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:51,433 INFO L225 Difference]: With dead ends: 4721 [2021-06-04 21:43:51,433 INFO L226 Difference]: Without dead ends: 4451 [2021-06-04 21:43:51,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 753.8ms TimeCoverageRelationStatistics Valid=932, Invalid=2728, Unknown=0, NotChecked=0, Total=3660 [2021-06-04 21:43:51,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-06-04 21:43:51,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 3728. [2021-06-04 21:43:51,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 3727 states have (on average 2.795277703246579) internal successors, (10418), 3727 states have internal predecessors, (10418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:51,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 10418 transitions. [2021-06-04 21:43:51,470 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 10418 transitions. Word has length 120 [2021-06-04 21:43:51,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:51,470 INFO L482 AbstractCegarLoop]: Abstraction has 3728 states and 10418 transitions. [2021-06-04 21:43:51,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:51,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 10418 transitions. [2021-06-04 21:43:51,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:51,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:51,473 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:51,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:51,674 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:51,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:51,674 INFO L82 PathProgramCache]: Analyzing trace with hash 121972818, now seen corresponding path program 163 times [2021-06-04 21:43:51,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:51,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302142914] [2021-06-04 21:43:51,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:51,846 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:51,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:51,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302142914] [2021-06-04 21:43:51,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302142914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:51,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606111037] [2021-06-04 21:43:51,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:51,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:51,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:51,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:52,066 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:52,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606111037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:52,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:52,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-04 21:43:52,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029388174] [2021-06-04 21:43:52,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:52,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:52,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:52,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:52,067 INFO L87 Difference]: Start difference. First operand 3728 states and 10418 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:52,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:52,718 INFO L93 Difference]: Finished difference Result 4791 states and 12777 transitions. [2021-06-04 21:43:52,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:43:52,718 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:52,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:52,721 INFO L225 Difference]: With dead ends: 4791 [2021-06-04 21:43:52,721 INFO L226 Difference]: Without dead ends: 4521 [2021-06-04 21:43:52,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 607.4ms TimeCoverageRelationStatistics Valid=921, Invalid=2501, Unknown=0, NotChecked=0, Total=3422 [2021-06-04 21:43:52,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2021-06-04 21:43:52,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 3803. [2021-06-04 21:43:52,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3803 states, 3802 states have (on average 2.8032614413466597) internal successors, (10658), 3802 states have internal predecessors, (10658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:52,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 10658 transitions. [2021-06-04 21:43:52,760 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 10658 transitions. Word has length 120 [2021-06-04 21:43:52,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:52,760 INFO L482 AbstractCegarLoop]: Abstraction has 3803 states and 10658 transitions. [2021-06-04 21:43:52,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:52,760 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 10658 transitions. [2021-06-04 21:43:52,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:52,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:52,763 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:52,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-04 21:43:52,963 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:52,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:52,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1593269470, now seen corresponding path program 164 times [2021-06-04 21:43:52,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:52,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548283512] [2021-06-04 21:43:52,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:53,154 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:53,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:53,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548283512] [2021-06-04 21:43:53,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548283512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:53,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008998789] [2021-06-04 21:43:53,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:53,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:43:53,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:53,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:53,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:53,430 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:53,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008998789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:53,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:53,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-04 21:43:53,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805263371] [2021-06-04 21:43:53,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:43:53,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:53,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:43:53,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:43:53,431 INFO L87 Difference]: Start difference. First operand 3803 states and 10658 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:54,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:54,291 INFO L93 Difference]: Finished difference Result 5369 states and 14403 transitions. [2021-06-04 21:43:54,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:43:54,291 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:54,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:54,296 INFO L225 Difference]: With dead ends: 5369 [2021-06-04 21:43:54,296 INFO L226 Difference]: Without dead ends: 4746 [2021-06-04 21:43:54,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 833.0ms TimeCoverageRelationStatistics Valid=1065, Invalid=3095, Unknown=0, NotChecked=0, Total=4160 [2021-06-04 21:43:54,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4746 states. [2021-06-04 21:43:54,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4746 to 3878. [2021-06-04 21:43:54,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8083569770441064) internal successors, (10888), 3877 states have internal predecessors, (10888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:54,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10888 transitions. [2021-06-04 21:43:54,332 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10888 transitions. Word has length 120 [2021-06-04 21:43:54,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:54,332 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10888 transitions. [2021-06-04 21:43:54,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:54,332 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10888 transitions. [2021-06-04 21:43:54,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:54,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:54,335 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:54,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:54,536 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:54,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:54,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1669050224, now seen corresponding path program 165 times [2021-06-04 21:43:54,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:54,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290128224] [2021-06-04 21:43:54,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:54,701 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:54,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:54,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290128224] [2021-06-04 21:43:54,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290128224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:54,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138209025] [2021-06-04 21:43:54,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:54,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-04 21:43:54,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:54,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:54,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:54,940 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:54,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138209025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:54,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:54,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-04 21:43:54,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562185518] [2021-06-04 21:43:54,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:54,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:54,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:54,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:54,941 INFO L87 Difference]: Start difference. First operand 3878 states and 10888 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:55,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:55,613 INFO L93 Difference]: Finished difference Result 5598 states and 15121 transitions. [2021-06-04 21:43:55,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:43:55,614 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:55,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:55,619 INFO L225 Difference]: With dead ends: 5598 [2021-06-04 21:43:55,619 INFO L226 Difference]: Without dead ends: 5328 [2021-06-04 21:43:55,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 637.8ms TimeCoverageRelationStatistics Valid=1040, Invalid=2620, Unknown=0, NotChecked=0, Total=3660 [2021-06-04 21:43:55,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5328 states. [2021-06-04 21:43:55,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5328 to 4058. [2021-06-04 21:43:55,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4058 states, 4057 states have (on average 2.82154301207789) internal successors, (11447), 4057 states have internal predecessors, (11447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:55,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4058 states to 4058 states and 11447 transitions. [2021-06-04 21:43:55,662 INFO L78 Accepts]: Start accepts. Automaton has 4058 states and 11447 transitions. Word has length 120 [2021-06-04 21:43:55,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:55,662 INFO L482 AbstractCegarLoop]: Abstraction has 4058 states and 11447 transitions. [2021-06-04 21:43:55,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:55,662 INFO L276 IsEmpty]: Start isEmpty. Operand 4058 states and 11447 transitions. [2021-06-04 21:43:55,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:55,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:55,665 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:55,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:55,866 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:55,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:55,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1691393474, now seen corresponding path program 166 times [2021-06-04 21:43:55,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:55,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336009055] [2021-06-04 21:43:55,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:56,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:56,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336009055] [2021-06-04 21:43:56,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336009055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:56,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705006900] [2021-06-04 21:43:56,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:56,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:43:56,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:56,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:56,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:56,242 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:56,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705006900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:56,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:56,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-04 21:43:56,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144879382] [2021-06-04 21:43:56,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:56,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:56,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:56,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:56,243 INFO L87 Difference]: Start difference. First operand 4058 states and 11447 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:57,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:57,088 INFO L93 Difference]: Finished difference Result 5085 states and 13821 transitions. [2021-06-04 21:43:57,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:43:57,089 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-04 21:43:57,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:57,093 INFO L225 Difference]: With dead ends: 5085 [2021-06-04 21:43:57,093 INFO L226 Difference]: Without dead ends: 4506 [2021-06-04 21:43:57,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 818.9ms TimeCoverageRelationStatistics Valid=1146, Invalid=2886, Unknown=0, NotChecked=0, Total=4032 [2021-06-04 21:43:57,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4506 states. [2021-06-04 21:43:57,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4506 to 2713. [2021-06-04 21:43:57,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 2.7389380530973453) internal successors, (7428), 2712 states have internal predecessors, (7428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:57,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7428 transitions. [2021-06-04 21:43:57,120 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7428 transitions. Word has length 120 [2021-06-04 21:43:57,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:57,120 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7428 transitions. [2021-06-04 21:43:57,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:57,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7428 transitions. [2021-06-04 21:43:57,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:43:57,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:57,122 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:57,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:57,323 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:57,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:57,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1352458403, now seen corresponding path program 167 times [2021-06-04 21:43:57,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:57,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121833497] [2021-06-04 21:43:57,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:57,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:57,568 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:57,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:57,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121833497] [2021-06-04 21:43:57,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121833497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:57,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156428412] [2021-06-04 21:43:57,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:57,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-04 21:43:57,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:57,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:43:57,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:57,804 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:57,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156428412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:57,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:57,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-04 21:43:57,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675499654] [2021-06-04 21:43:57,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:57,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:57,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:57,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:57,805 INFO L87 Difference]: Start difference. First operand 2713 states and 7428 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:58,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:58,216 INFO L93 Difference]: Finished difference Result 4031 states and 10267 transitions. [2021-06-04 21:43:58,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:43:58,217 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:43:58,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:58,220 INFO L225 Difference]: With dead ends: 4031 [2021-06-04 21:43:58,220 INFO L226 Difference]: Without dead ends: 3761 [2021-06-04 21:43:58,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 499.9ms TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2021-06-04 21:43:58,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2021-06-04 21:43:58,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 2788. [2021-06-04 21:43:58,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.7459634015069967) internal successors, (7653), 2787 states have internal predecessors, (7653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:58,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7653 transitions. [2021-06-04 21:43:58,246 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7653 transitions. Word has length 125 [2021-06-04 21:43:58,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:58,246 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7653 transitions. [2021-06-04 21:43:58,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:58,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7653 transitions. [2021-06-04 21:43:58,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:43:58,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:58,248 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:58,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-06-04 21:43:58,449 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:58,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:58,449 INFO L82 PathProgramCache]: Analyzing trace with hash 2043985453, now seen corresponding path program 168 times [2021-06-04 21:43:58,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:58,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536438018] [2021-06-04 21:43:58,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:58,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:58,680 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:58,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:58,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536438018] [2021-06-04 21:43:58,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536438018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:58,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874059921] [2021-06-04 21:43:58,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:58,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-04 21:43:58,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:58,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:43:58,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:58,934 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:58,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874059921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:58,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:58,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-04 21:43:58,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429287671] [2021-06-04 21:43:58,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:43:58,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:58,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:43:58,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:43:58,935 INFO L87 Difference]: Start difference. First operand 2788 states and 7653 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:59,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:59,397 INFO L93 Difference]: Finished difference Result 4501 states and 11282 transitions. [2021-06-04 21:43:59,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:43:59,398 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:43:59,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:59,401 INFO L225 Difference]: With dead ends: 4501 [2021-06-04 21:43:59,401 INFO L226 Difference]: Without dead ends: 4231 [2021-06-04 21:43:59,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 536.4ms TimeCoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2021-06-04 21:43:59,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4231 states. [2021-06-04 21:43:59,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4231 to 2863. [2021-06-04 21:43:59,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.752620545073375) internal successors, (7878), 2862 states have internal predecessors, (7878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:59,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7878 transitions. [2021-06-04 21:43:59,428 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7878 transitions. Word has length 125 [2021-06-04 21:43:59,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:59,429 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7878 transitions. [2021-06-04 21:43:59,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:59,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7878 transitions. [2021-06-04 21:43:59,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:43:59,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:59,431 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:43:59,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:59,631 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:59,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:59,631 INFO L82 PathProgramCache]: Analyzing trace with hash 429031963, now seen corresponding path program 169 times [2021-06-04 21:43:59,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:59,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162967697] [2021-06-04 21:43:59,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:59,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:59,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:59,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162967697] [2021-06-04 21:43:59,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162967697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:59,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037534610] [2021-06-04 21:43:59,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:59,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:43:59,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:00,057 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:00,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037534610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:00,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:00,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-04 21:44:00,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357410232] [2021-06-04 21:44:00,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:00,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:00,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:00,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:00,058 INFO L87 Difference]: Start difference. First operand 2863 states and 7878 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:00,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:00,500 INFO L93 Difference]: Finished difference Result 4531 states and 11417 transitions. [2021-06-04 21:44:00,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:44:00,500 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:00,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:00,504 INFO L225 Difference]: With dead ends: 4531 [2021-06-04 21:44:00,504 INFO L226 Difference]: Without dead ends: 4261 [2021-06-04 21:44:00,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 492.4ms TimeCoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2021-06-04 21:44:00,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4261 states. [2021-06-04 21:44:00,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4261 to 2938. [2021-06-04 21:44:00,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 2.758937691521961) internal successors, (8103), 2937 states have internal predecessors, (8103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:00,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8103 transitions. [2021-06-04 21:44:00,532 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8103 transitions. Word has length 125 [2021-06-04 21:44:00,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:00,532 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8103 transitions. [2021-06-04 21:44:00,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:00,532 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8103 transitions. [2021-06-04 21:44:00,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:00,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:00,534 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:00,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-04 21:44:00,735 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:00,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:00,735 INFO L82 PathProgramCache]: Analyzing trace with hash 48588011, now seen corresponding path program 170 times [2021-06-04 21:44:00,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:00,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423806836] [2021-06-04 21:44:00,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:00,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:00,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:00,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423806836] [2021-06-04 21:44:00,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423806836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:00,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80622176] [2021-06-04 21:44:00,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:01,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:44:01,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:01,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:01,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:01,199 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:01,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80622176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:01,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:01,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-04 21:44:01,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427666460] [2021-06-04 21:44:01,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:01,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:01,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:01,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:01,200 INFO L87 Difference]: Start difference. First operand 2938 states and 8103 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:01,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:01,723 INFO L93 Difference]: Finished difference Result 4556 states and 11542 transitions. [2021-06-04 21:44:01,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:44:01,724 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:01,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:01,728 INFO L225 Difference]: With dead ends: 4556 [2021-06-04 21:44:01,728 INFO L226 Difference]: Without dead ends: 4286 [2021-06-04 21:44:01,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 590.8ms TimeCoverageRelationStatistics Valid=653, Invalid=2103, Unknown=0, NotChecked=0, Total=2756 [2021-06-04 21:44:01,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4286 states. [2021-06-04 21:44:01,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4286 to 3013. [2021-06-04 21:44:01,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 3012 states have (on average 2.764940239043825) internal successors, (8328), 3012 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:01,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8328 transitions. [2021-06-04 21:44:01,757 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8328 transitions. Word has length 125 [2021-06-04 21:44:01,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:01,757 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8328 transitions. [2021-06-04 21:44:01,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:01,757 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8328 transitions. [2021-06-04 21:44:01,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:01,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:01,759 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:01,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-04 21:44:01,960 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:01,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:01,960 INFO L82 PathProgramCache]: Analyzing trace with hash 672963161, now seen corresponding path program 171 times [2021-06-04 21:44:01,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:01,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12555129] [2021-06-04 21:44:01,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:02,158 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:02,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:02,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12555129] [2021-06-04 21:44:02,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12555129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:02,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038392769] [2021-06-04 21:44:02,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:02,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-04 21:44:02,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:02,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:02,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:02,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038392769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:02,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:02,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-04 21:44:02,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052758985] [2021-06-04 21:44:02,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:02,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:02,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:02,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:02,405 INFO L87 Difference]: Start difference. First operand 3013 states and 8328 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:02,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:02,905 INFO L93 Difference]: Finished difference Result 4581 states and 11667 transitions. [2021-06-04 21:44:02,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:44:02,905 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:02,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:02,909 INFO L225 Difference]: With dead ends: 4581 [2021-06-04 21:44:02,909 INFO L226 Difference]: Without dead ends: 4311 [2021-06-04 21:44:02,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 535.6ms TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2021-06-04 21:44:02,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4311 states. [2021-06-04 21:44:02,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4311 to 3088. [2021-06-04 21:44:02,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 2.770651117589893) internal successors, (8553), 3087 states have internal predecessors, (8553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:02,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8553 transitions. [2021-06-04 21:44:02,939 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8553 transitions. Word has length 125 [2021-06-04 21:44:02,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:02,939 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8553 transitions. [2021-06-04 21:44:02,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:02,939 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8553 transitions. [2021-06-04 21:44:02,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:02,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:02,941 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:03,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-04 21:44:03,142 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:03,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:03,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1482015017, now seen corresponding path program 172 times [2021-06-04 21:44:03,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:03,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762716026] [2021-06-04 21:44:03,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:03,350 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:03,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:03,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762716026] [2021-06-04 21:44:03,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762716026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:03,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037863050] [2021-06-04 21:44:03,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:03,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:44:03,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:03,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:03,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:03,596 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:03,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037863050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:03,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:03,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-04 21:44:03,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175576299] [2021-06-04 21:44:03,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:03,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:03,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:03,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:03,597 INFO L87 Difference]: Start difference. First operand 3088 states and 8553 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:04,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:04,191 INFO L93 Difference]: Finished difference Result 4606 states and 11792 transitions. [2021-06-04 21:44:04,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:44:04,192 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:04,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:04,196 INFO L225 Difference]: With dead ends: 4606 [2021-06-04 21:44:04,196 INFO L226 Difference]: Without dead ends: 4336 [2021-06-04 21:44:04,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 606.0ms TimeCoverageRelationStatistics Valid=691, Invalid=2279, Unknown=0, NotChecked=0, Total=2970 [2021-06-04 21:44:04,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4336 states. [2021-06-04 21:44:04,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4336 to 3163. [2021-06-04 21:44:04,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3163 states, 3162 states have (on average 2.7760910815939277) internal successors, (8778), 3162 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:04,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 8778 transitions. [2021-06-04 21:44:04,239 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 8778 transitions. Word has length 125 [2021-06-04 21:44:04,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:04,240 INFO L482 AbstractCegarLoop]: Abstraction has 3163 states and 8778 transitions. [2021-06-04 21:44:04,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:04,240 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 8778 transitions. [2021-06-04 21:44:04,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:04,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:04,243 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:04,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-06-04 21:44:04,457 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:04,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:04,457 INFO L82 PathProgramCache]: Analyzing trace with hash 90064919, now seen corresponding path program 173 times [2021-06-04 21:44:04,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:04,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259116331] [2021-06-04 21:44:04,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:04,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:04,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:04,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259116331] [2021-06-04 21:44:04,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259116331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:04,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998629935] [2021-06-04 21:44:04,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:04,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-04 21:44:04,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:04,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:04,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:04,881 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:04,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998629935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:04,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:04,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-04 21:44:04,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381346700] [2021-06-04 21:44:04,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:04,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:04,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:04,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:04,882 INFO L87 Difference]: Start difference. First operand 3163 states and 8778 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:05,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:05,411 INFO L93 Difference]: Finished difference Result 4631 states and 11917 transitions. [2021-06-04 21:44:05,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:44:05,412 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:05,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:05,416 INFO L225 Difference]: With dead ends: 4631 [2021-06-04 21:44:05,416 INFO L226 Difference]: Without dead ends: 4361 [2021-06-04 21:44:05,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 536.5ms TimeCoverageRelationStatistics Valid=719, Invalid=2251, Unknown=0, NotChecked=0, Total=2970 [2021-06-04 21:44:05,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4361 states. [2021-06-04 21:44:05,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 3238. [2021-06-04 21:44:05,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3238 states, 3237 states have (on average 2.7812789620018536) internal successors, (9003), 3237 states have internal predecessors, (9003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:05,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3238 states to 3238 states and 9003 transitions. [2021-06-04 21:44:05,450 INFO L78 Accepts]: Start accepts. Automaton has 3238 states and 9003 transitions. Word has length 125 [2021-06-04 21:44:05,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:05,450 INFO L482 AbstractCegarLoop]: Abstraction has 3238 states and 9003 transitions. [2021-06-04 21:44:05,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:05,450 INFO L276 IsEmpty]: Start isEmpty. Operand 3238 states and 9003 transitions. [2021-06-04 21:44:05,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:05,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:05,452 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:05,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:05,653 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:05,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:05,653 INFO L82 PathProgramCache]: Analyzing trace with hash -155012377, now seen corresponding path program 174 times [2021-06-04 21:44:05,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:05,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122799606] [2021-06-04 21:44:05,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:05,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:05,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:05,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122799606] [2021-06-04 21:44:05,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122799606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:05,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399489400] [2021-06-04 21:44:05,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:05,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-04 21:44:05,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:05,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:05,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:06,095 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:06,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399489400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:06,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:06,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-04 21:44:06,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732209798] [2021-06-04 21:44:06,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:06,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:06,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:06,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:06,096 INFO L87 Difference]: Start difference. First operand 3238 states and 9003 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:06,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:06,731 INFO L93 Difference]: Finished difference Result 4656 states and 12042 transitions. [2021-06-04 21:44:06,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:44:06,731 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:06,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:06,735 INFO L225 Difference]: With dead ends: 4656 [2021-06-04 21:44:06,735 INFO L226 Difference]: Without dead ends: 4386 [2021-06-04 21:44:06,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 640.6ms TimeCoverageRelationStatistics Valid=745, Invalid=2447, Unknown=0, NotChecked=0, Total=3192 [2021-06-04 21:44:06,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2021-06-04 21:44:06,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 3313. [2021-06-04 21:44:06,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3313 states, 3312 states have (on average 2.786231884057971) internal successors, (9228), 3312 states have internal predecessors, (9228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:06,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3313 states to 3313 states and 9228 transitions. [2021-06-04 21:44:06,785 INFO L78 Accepts]: Start accepts. Automaton has 3313 states and 9228 transitions. Word has length 125 [2021-06-04 21:44:06,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:06,786 INFO L482 AbstractCegarLoop]: Abstraction has 3313 states and 9228 transitions. [2021-06-04 21:44:06,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:06,786 INFO L276 IsEmpty]: Start isEmpty. Operand 3313 states and 9228 transitions. [2021-06-04 21:44:06,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:06,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:06,789 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:06,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-04 21:44:06,997 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:06,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:06,997 INFO L82 PathProgramCache]: Analyzing trace with hash -531862699, now seen corresponding path program 175 times [2021-06-04 21:44:06,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:06,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300954522] [2021-06-04 21:44:06,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:07,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:07,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300954522] [2021-06-04 21:44:07,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300954522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:07,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282864789] [2021-06-04 21:44:07,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:07,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:07,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:07,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282864789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:07,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:07,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-04 21:44:07,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934997075] [2021-06-04 21:44:07,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:07,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:07,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:07,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:07,407 INFO L87 Difference]: Start difference. First operand 3313 states and 9228 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:07,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:07,976 INFO L93 Difference]: Finished difference Result 4681 states and 12167 transitions. [2021-06-04 21:44:07,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:44:07,977 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:07,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:07,981 INFO L225 Difference]: With dead ends: 4681 [2021-06-04 21:44:07,981 INFO L226 Difference]: Without dead ends: 4411 [2021-06-04 21:44:07,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 566.3ms TimeCoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2021-06-04 21:44:07,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4411 states. [2021-06-04 21:44:08,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4411 to 3388. [2021-06-04 21:44:08,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3388 states, 3387 states have (on average 2.7909654561558903) internal successors, (9453), 3387 states have internal predecessors, (9453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:08,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 9453 transitions. [2021-06-04 21:44:08,017 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 9453 transitions. Word has length 125 [2021-06-04 21:44:08,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:08,017 INFO L482 AbstractCegarLoop]: Abstraction has 3388 states and 9453 transitions. [2021-06-04 21:44:08,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:08,017 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 9453 transitions. [2021-06-04 21:44:08,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:08,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:08,020 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:08,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:08,220 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:08,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:08,220 INFO L82 PathProgramCache]: Analyzing trace with hash 794892837, now seen corresponding path program 176 times [2021-06-04 21:44:08,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:08,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425565376] [2021-06-04 21:44:08,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:08,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:08,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425565376] [2021-06-04 21:44:08,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425565376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:08,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791332570] [2021-06-04 21:44:08,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:08,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:44:08,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:08,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:08,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:08,653 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:08,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791332570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:08,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:08,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-04 21:44:08,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311195862] [2021-06-04 21:44:08,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:08,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:08,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:08,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:08,654 INFO L87 Difference]: Start difference. First operand 3388 states and 9453 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:09,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:09,348 INFO L93 Difference]: Finished difference Result 4706 states and 12292 transitions. [2021-06-04 21:44:09,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:44:09,348 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:09,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:09,352 INFO L225 Difference]: With dead ends: 4706 [2021-06-04 21:44:09,352 INFO L226 Difference]: Without dead ends: 4436 [2021-06-04 21:44:09,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 693.4ms TimeCoverageRelationStatistics Valid=815, Invalid=2607, Unknown=0, NotChecked=0, Total=3422 [2021-06-04 21:44:09,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4436 states. [2021-06-04 21:44:09,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4436 to 3463. [2021-06-04 21:44:09,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3463 states, 3462 states have (on average 2.7954939341421143) internal successors, (9678), 3462 states have internal predecessors, (9678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:09,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 9678 transitions. [2021-06-04 21:44:09,387 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 9678 transitions. Word has length 125 [2021-06-04 21:44:09,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:09,388 INFO L482 AbstractCegarLoop]: Abstraction has 3463 states and 9678 transitions. [2021-06-04 21:44:09,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:09,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 9678 transitions. [2021-06-04 21:44:09,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:09,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:09,390 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:09,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:09,591 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:09,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:09,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1249109011, now seen corresponding path program 177 times [2021-06-04 21:44:09,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:09,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439380534] [2021-06-04 21:44:09,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:09,787 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:09,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:09,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439380534] [2021-06-04 21:44:09,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439380534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:09,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133053278] [2021-06-04 21:44:09,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:09,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-04 21:44:09,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:09,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:09,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:10,034 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:10,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133053278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:10,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:10,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-04 21:44:10,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14399805] [2021-06-04 21:44:10,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:10,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:10,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:10,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:10,035 INFO L87 Difference]: Start difference. First operand 3463 states and 9678 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:10,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:10,643 INFO L93 Difference]: Finished difference Result 4731 states and 12417 transitions. [2021-06-04 21:44:10,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:44:10,644 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:10,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:10,648 INFO L225 Difference]: With dead ends: 4731 [2021-06-04 21:44:10,648 INFO L226 Difference]: Without dead ends: 4461 [2021-06-04 21:44:10,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 608.0ms TimeCoverageRelationStatistics Valid=871, Invalid=2551, Unknown=0, NotChecked=0, Total=3422 [2021-06-04 21:44:10,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4461 states. [2021-06-04 21:44:10,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4461 to 3538. [2021-06-04 21:44:10,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3538 states, 3537 states have (on average 2.799830364715861) internal successors, (9903), 3537 states have internal predecessors, (9903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:10,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 9903 transitions. [2021-06-04 21:44:10,708 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 9903 transitions. Word has length 125 [2021-06-04 21:44:10,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:10,708 INFO L482 AbstractCegarLoop]: Abstraction has 3538 states and 9903 transitions. [2021-06-04 21:44:10,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:10,708 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 9903 transitions. [2021-06-04 21:44:10,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:10,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:10,711 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:10,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:10,911 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:10,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:10,911 INFO L82 PathProgramCache]: Analyzing trace with hash -2046961949, now seen corresponding path program 178 times [2021-06-04 21:44:10,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:10,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77299031] [2021-06-04 21:44:10,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:11,098 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:11,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:11,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77299031] [2021-06-04 21:44:11,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77299031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:11,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779486389] [2021-06-04 21:44:11,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:11,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:44:11,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:11,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:11,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:11,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779486389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:11,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:11,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-04 21:44:11,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99084412] [2021-06-04 21:44:11,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:11,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:11,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:11,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:11,329 INFO L87 Difference]: Start difference. First operand 3538 states and 9903 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:12,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:12,079 INFO L93 Difference]: Finished difference Result 4756 states and 12542 transitions. [2021-06-04 21:44:12,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:44:12,079 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:12,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:12,084 INFO L225 Difference]: With dead ends: 4756 [2021-06-04 21:44:12,084 INFO L226 Difference]: Without dead ends: 4486 [2021-06-04 21:44:12,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 735.8ms TimeCoverageRelationStatistics Valid=901, Invalid=2759, Unknown=0, NotChecked=0, Total=3660 [2021-06-04 21:44:12,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2021-06-04 21:44:12,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 3613. [2021-06-04 21:44:12,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 3612 states have (on average 2.8039867109634553) internal successors, (10128), 3612 states have internal predecessors, (10128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:12,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 10128 transitions. [2021-06-04 21:44:12,120 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 10128 transitions. Word has length 125 [2021-06-04 21:44:12,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:12,121 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 10128 transitions. [2021-06-04 21:44:12,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:12,121 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 10128 transitions. [2021-06-04 21:44:12,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:12,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:12,123 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:12,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:12,324 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:12,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:12,324 INFO L82 PathProgramCache]: Analyzing trace with hash 368677457, now seen corresponding path program 179 times [2021-06-04 21:44:12,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:12,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469830991] [2021-06-04 21:44:12,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:12,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:12,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469830991] [2021-06-04 21:44:12,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469830991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:12,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593795091] [2021-06-04 21:44:12,502 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:12,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-04 21:44:12,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:12,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:12,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:12,729 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:12,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593795091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:12,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:12,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-04 21:44:12,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210028323] [2021-06-04 21:44:12,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:12,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:12,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:12,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:12,730 INFO L87 Difference]: Start difference. First operand 3613 states and 10128 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:13,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:13,419 INFO L93 Difference]: Finished difference Result 4781 states and 12667 transitions. [2021-06-04 21:44:13,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:44:13,419 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:13,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:13,424 INFO L225 Difference]: With dead ends: 4781 [2021-06-04 21:44:13,424 INFO L226 Difference]: Without dead ends: 4511 [2021-06-04 21:44:13,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 637.2ms TimeCoverageRelationStatistics Valid=971, Invalid=2689, Unknown=0, NotChecked=0, Total=3660 [2021-06-04 21:44:13,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-06-04 21:44:13,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3688. [2021-06-04 21:44:13,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3688 states, 3687 states have (on average 2.807973962571196) internal successors, (10353), 3687 states have internal predecessors, (10353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:13,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 10353 transitions. [2021-06-04 21:44:13,462 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 10353 transitions. Word has length 125 [2021-06-04 21:44:13,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:13,462 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 10353 transitions. [2021-06-04 21:44:13,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:13,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 10353 transitions. [2021-06-04 21:44:13,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:13,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:13,465 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:13,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable187 [2021-06-04 21:44:13,666 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:13,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:13,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1895970527, now seen corresponding path program 180 times [2021-06-04 21:44:13,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:13,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341104950] [2021-06-04 21:44:13,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:13,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:13,849 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:13,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:13,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341104950] [2021-06-04 21:44:13,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341104950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:13,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325111085] [2021-06-04 21:44:13,849 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:13,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-04 21:44:13,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:13,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:13,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:14,073 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:14,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325111085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:14,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:14,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-04 21:44:14,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678036245] [2021-06-04 21:44:14,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:14,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:14,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:14,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:14,074 INFO L87 Difference]: Start difference. First operand 3688 states and 10353 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:14,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:14,869 INFO L93 Difference]: Finished difference Result 4806 states and 12792 transitions. [2021-06-04 21:44:14,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:44:14,869 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:14,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:14,873 INFO L225 Difference]: With dead ends: 4806 [2021-06-04 21:44:14,873 INFO L226 Difference]: Without dead ends: 4536 [2021-06-04 21:44:14,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 769.5ms TimeCoverageRelationStatistics Valid=1003, Invalid=2903, Unknown=0, NotChecked=0, Total=3906 [2021-06-04 21:44:14,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2021-06-04 21:44:14,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 3763. [2021-06-04 21:44:14,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3763 states, 3762 states have (on average 2.8118022328548644) internal successors, (10578), 3762 states have internal predecessors, (10578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:14,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 10578 transitions. [2021-06-04 21:44:14,911 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 10578 transitions. Word has length 125 [2021-06-04 21:44:14,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:14,911 INFO L482 AbstractCegarLoop]: Abstraction has 3763 states and 10578 transitions. [2021-06-04 21:44:14,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:14,911 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 10578 transitions. [2021-06-04 21:44:14,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:14,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:14,914 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:15,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-04 21:44:15,115 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:15,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:15,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1281731057, now seen corresponding path program 181 times [2021-06-04 21:44:15,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:15,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052921442] [2021-06-04 21:44:15,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:15,289 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:15,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:15,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052921442] [2021-06-04 21:44:15,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052921442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:15,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815030347] [2021-06-04 21:44:15,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:15,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:15,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:15,490 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:15,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815030347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:15,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:15,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-04 21:44:15,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407585002] [2021-06-04 21:44:15,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:15,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:15,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:15,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:15,491 INFO L87 Difference]: Start difference. First operand 3763 states and 10578 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:16,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:16,189 INFO L93 Difference]: Finished difference Result 4831 states and 12917 transitions. [2021-06-04 21:44:16,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:44:16,189 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:16,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:16,193 INFO L225 Difference]: With dead ends: 4831 [2021-06-04 21:44:16,194 INFO L226 Difference]: Without dead ends: 4561 [2021-06-04 21:44:16,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 658.2ms TimeCoverageRelationStatistics Valid=1087, Invalid=2819, Unknown=0, NotChecked=0, Total=3906 [2021-06-04 21:44:16,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-06-04 21:44:16,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3838. [2021-06-04 21:44:16,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.815480844409695) internal successors, (10803), 3837 states have internal predecessors, (10803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:16,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 10803 transitions. [2021-06-04 21:44:16,233 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 10803 transitions. Word has length 125 [2021-06-04 21:44:16,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:16,233 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 10803 transitions. [2021-06-04 21:44:16,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:16,233 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 10803 transitions. [2021-06-04 21:44:16,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:16,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:16,236 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:16,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-04 21:44:16,436 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:16,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:16,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1297993951, now seen corresponding path program 182 times [2021-06-04 21:44:16,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:16,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532302909] [2021-06-04 21:44:16,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:16,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:16,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532302909] [2021-06-04 21:44:16,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532302909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:16,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661093255] [2021-06-04 21:44:16,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:16,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:44:16,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:16,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:16,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:16,849 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:16,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661093255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:16,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:16,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-04 21:44:16,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435392254] [2021-06-04 21:44:16,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:16,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:16,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:16,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:16,850 INFO L87 Difference]: Start difference. First operand 3838 states and 10803 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:17,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:17,685 INFO L93 Difference]: Finished difference Result 4916 states and 13207 transitions. [2021-06-04 21:44:17,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:44:17,686 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:17,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:17,690 INFO L225 Difference]: With dead ends: 4916 [2021-06-04 21:44:17,690 INFO L226 Difference]: Without dead ends: 4646 [2021-06-04 21:44:17,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 792.2ms TimeCoverageRelationStatistics Valid=1121, Invalid=3039, Unknown=0, NotChecked=0, Total=4160 [2021-06-04 21:44:17,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4646 states. [2021-06-04 21:44:17,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4646 to 3913. [2021-06-04 21:44:17,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3912 states have (on average 2.8241308793456033) internal successors, (11048), 3912 states have internal predecessors, (11048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:17,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 11048 transitions. [2021-06-04 21:44:17,727 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 11048 transitions. Word has length 125 [2021-06-04 21:44:17,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:17,727 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 11048 transitions. [2021-06-04 21:44:17,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:17,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 11048 transitions. [2021-06-04 21:44:17,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:17,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:17,730 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:17,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:17,932 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:17,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:17,932 INFO L82 PathProgramCache]: Analyzing trace with hash 265346349, now seen corresponding path program 183 times [2021-06-04 21:44:17,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:17,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939049132] [2021-06-04 21:44:17,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:17,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:18,109 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:18,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:18,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939049132] [2021-06-04 21:44:18,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939049132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:18,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618259188] [2021-06-04 21:44:18,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:18,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-04 21:44:18,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:18,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:18,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:18,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618259188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:18,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:18,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-04 21:44:18,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740320877] [2021-06-04 21:44:18,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:18,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:18,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:18,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:18,321 INFO L87 Difference]: Start difference. First operand 3913 states and 11048 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:19,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:19,030 INFO L93 Difference]: Finished difference Result 5658 states and 15331 transitions. [2021-06-04 21:44:19,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:44:19,030 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:19,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:19,035 INFO L225 Difference]: With dead ends: 5658 [2021-06-04 21:44:19,035 INFO L226 Difference]: Without dead ends: 5388 [2021-06-04 21:44:19,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 680.4ms TimeCoverageRelationStatistics Valid=1220, Invalid=2940, Unknown=0, NotChecked=0, Total=4160 [2021-06-04 21:44:19,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5388 states. [2021-06-04 21:44:19,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5388 to 4093. [2021-06-04 21:44:19,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4093 states, 4092 states have (on average 2.8365102639296187) internal successors, (11607), 4092 states have internal predecessors, (11607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:19,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4093 states to 4093 states and 11607 transitions. [2021-06-04 21:44:19,076 INFO L78 Accepts]: Start accepts. Automaton has 4093 states and 11607 transitions. Word has length 125 [2021-06-04 21:44:19,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:19,077 INFO L482 AbstractCegarLoop]: Abstraction has 4093 states and 11607 transitions. [2021-06-04 21:44:19,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:19,077 INFO L276 IsEmpty]: Start isEmpty. Operand 4093 states and 11607 transitions. [2021-06-04 21:44:19,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:19,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:19,080 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:19,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:19,285 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:19,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:19,285 INFO L82 PathProgramCache]: Analyzing trace with hash 287689599, now seen corresponding path program 184 times [2021-06-04 21:44:19,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:19,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193093143] [2021-06-04 21:44:19,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:19,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:19,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193093143] [2021-06-04 21:44:19,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193093143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:19,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782809950] [2021-06-04 21:44:19,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:19,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:44:19,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:19,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:19,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:19,679 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:19,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782809950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:19,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:19,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-04 21:44:19,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90658068] [2021-06-04 21:44:19,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:19,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:19,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:19,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:19,680 INFO L87 Difference]: Start difference. First operand 4093 states and 11607 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:20,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:20,551 INFO L93 Difference]: Finished difference Result 5120 states and 13981 transitions. [2021-06-04 21:44:20,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:44:20,552 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-04 21:44:20,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:20,557 INFO L225 Difference]: With dead ends: 5120 [2021-06-04 21:44:20,557 INFO L226 Difference]: Without dead ends: 4631 [2021-06-04 21:44:20,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 831.5ms TimeCoverageRelationStatistics Valid=1258, Invalid=3164, Unknown=0, NotChecked=0, Total=4422 [2021-06-04 21:44:20,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4631 states. [2021-06-04 21:44:20,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4631 to 2634. [2021-06-04 21:44:20,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2634 states, 2633 states have (on average 2.7406000759589824) internal successors, (7216), 2633 states have internal predecessors, (7216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:20,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 7216 transitions. [2021-06-04 21:44:20,592 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 7216 transitions. Word has length 125 [2021-06-04 21:44:20,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:20,592 INFO L482 AbstractCegarLoop]: Abstraction has 2634 states and 7216 transitions. [2021-06-04 21:44:20,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:20,592 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 7216 transitions. [2021-06-04 21:44:20,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:20,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:20,594 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:20,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:20,794 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:20,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:20,812 INFO L82 PathProgramCache]: Analyzing trace with hash -325106707, now seen corresponding path program 185 times [2021-06-04 21:44:20,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:20,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982240441] [2021-06-04 21:44:20,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:21,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:21,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982240441] [2021-06-04 21:44:21,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982240441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:21,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974819271] [2021-06-04 21:44:21,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:21,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-04 21:44:21,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:21,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:44:21,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:21,395 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:21,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974819271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:21,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:21,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-04 21:44:21,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307998533] [2021-06-04 21:44:21,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:44:21,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:21,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:44:21,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:44:21,396 INFO L87 Difference]: Start difference. First operand 2634 states and 7216 transitions. Second operand has 28 states, 28 states have (on average 5.642857142857143) internal successors, (158), 28 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:21,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:21,896 INFO L93 Difference]: Finished difference Result 3774 states and 9816 transitions. [2021-06-04 21:44:21,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:44:21,896 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.642857142857143) internal successors, (158), 28 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:21,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:21,900 INFO L225 Difference]: With dead ends: 3774 [2021-06-04 21:44:21,900 INFO L226 Difference]: Without dead ends: 3440 [2021-06-04 21:44:21,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 616.1ms TimeCoverageRelationStatistics Valid=760, Invalid=2102, Unknown=0, NotChecked=0, Total=2862 [2021-06-04 21:44:21,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2021-06-04 21:44:21,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 2719. [2021-06-04 21:44:21,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2719 states, 2718 states have (on average 2.717439293598234) internal successors, (7386), 2718 states have internal predecessors, (7386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:21,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 7386 transitions. [2021-06-04 21:44:21,925 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 7386 transitions. Word has length 130 [2021-06-04 21:44:21,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:21,925 INFO L482 AbstractCegarLoop]: Abstraction has 2719 states and 7386 transitions. [2021-06-04 21:44:21,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.642857142857143) internal successors, (158), 28 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:21,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 7386 transitions. [2021-06-04 21:44:21,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:21,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:21,927 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:22,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:22,128 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:22,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:22,128 INFO L82 PathProgramCache]: Analyzing trace with hash -2008975183, now seen corresponding path program 186 times [2021-06-04 21:44:22,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:22,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223606042] [2021-06-04 21:44:22,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:22,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:22,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223606042] [2021-06-04 21:44:22,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223606042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:22,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276916195] [2021-06-04 21:44:22,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:22,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-04 21:44:22,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:22,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:22,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:22,618 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:22,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276916195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:22,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:22,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:44:22,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641528661] [2021-06-04 21:44:22,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:22,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:22,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:22,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:22,620 INFO L87 Difference]: Start difference. First operand 2719 states and 7386 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:23,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:23,040 INFO L93 Difference]: Finished difference Result 4696 states and 11597 transitions. [2021-06-04 21:44:23,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:44:23,040 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:23,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:23,044 INFO L225 Difference]: With dead ends: 4696 [2021-06-04 21:44:23,044 INFO L226 Difference]: Without dead ends: 4426 [2021-06-04 21:44:23,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 502.2ms TimeCoverageRelationStatistics Valid=616, Invalid=1640, Unknown=0, NotChecked=0, Total=2256 [2021-06-04 21:44:23,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2021-06-04 21:44:23,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 2863. [2021-06-04 21:44:23,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.7264150943396226) internal successors, (7803), 2862 states have internal predecessors, (7803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:23,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7803 transitions. [2021-06-04 21:44:23,071 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7803 transitions. Word has length 130 [2021-06-04 21:44:23,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:23,071 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7803 transitions. [2021-06-04 21:44:23,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:23,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7803 transitions. [2021-06-04 21:44:23,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:23,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:23,073 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:23,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-04 21:44:23,273 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:23,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:23,274 INFO L82 PathProgramCache]: Analyzing trace with hash -644426879, now seen corresponding path program 187 times [2021-06-04 21:44:23,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:23,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117298165] [2021-06-04 21:44:23,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:23,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:23,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117298165] [2021-06-04 21:44:23,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117298165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:23,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094029500] [2021-06-04 21:44:23,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:23,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:23,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:23,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:23,767 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:23,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094029500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:23,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:23,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:44:23,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797315587] [2021-06-04 21:44:23,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:23,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:23,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:23,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:23,768 INFO L87 Difference]: Start difference. First operand 2863 states and 7803 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:24,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:24,262 INFO L93 Difference]: Finished difference Result 4656 states and 11592 transitions. [2021-06-04 21:44:24,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:44:24,263 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:24,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:24,267 INFO L225 Difference]: With dead ends: 4656 [2021-06-04 21:44:24,267 INFO L226 Difference]: Without dead ends: 4386 [2021-06-04 21:44:24,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 576.8ms TimeCoverageRelationStatistics Valid=683, Invalid=1969, Unknown=0, NotChecked=0, Total=2652 [2021-06-04 21:44:24,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2021-06-04 21:44:24,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 2938. [2021-06-04 21:44:24,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 2.7334014300306437) internal successors, (8028), 2937 states have internal predecessors, (8028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:24,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8028 transitions. [2021-06-04 21:44:24,295 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8028 transitions. Word has length 130 [2021-06-04 21:44:24,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:24,295 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8028 transitions. [2021-06-04 21:44:24,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:24,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8028 transitions. [2021-06-04 21:44:24,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:24,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:24,297 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:24,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:24,498 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:24,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:24,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1373308399, now seen corresponding path program 188 times [2021-06-04 21:44:24,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:24,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857321621] [2021-06-04 21:44:24,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:24,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:24,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:24,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857321621] [2021-06-04 21:44:24,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857321621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:24,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492222026] [2021-06-04 21:44:24,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:24,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:44:24,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:24,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:24,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:24,995 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:24,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492222026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:24,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:24,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:44:24,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265310345] [2021-06-04 21:44:24,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:24,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:24,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:24,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:24,996 INFO L87 Difference]: Start difference. First operand 2938 states and 8028 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:25,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:25,427 INFO L93 Difference]: Finished difference Result 4706 states and 11767 transitions. [2021-06-04 21:44:25,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:44:25,428 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:25,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:25,432 INFO L225 Difference]: With dead ends: 4706 [2021-06-04 21:44:25,432 INFO L226 Difference]: Without dead ends: 4436 [2021-06-04 21:44:25,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 524.3ms TimeCoverageRelationStatistics Valid=621, Invalid=1829, Unknown=0, NotChecked=0, Total=2450 [2021-06-04 21:44:25,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4436 states. [2021-06-04 21:44:25,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4436 to 3013. [2021-06-04 21:44:25,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 3012 states have (on average 2.74003984063745) internal successors, (8253), 3012 states have internal predecessors, (8253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:25,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8253 transitions. [2021-06-04 21:44:25,461 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8253 transitions. Word has length 130 [2021-06-04 21:44:25,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:25,461 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8253 transitions. [2021-06-04 21:44:25,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:25,461 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8253 transitions. [2021-06-04 21:44:25,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:25,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:25,463 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:25,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:25,664 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:25,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:25,664 INFO L82 PathProgramCache]: Analyzing trace with hash 474784959, now seen corresponding path program 189 times [2021-06-04 21:44:25,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:25,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031641156] [2021-06-04 21:44:25,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:25,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:25,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031641156] [2021-06-04 21:44:25,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031641156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:25,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614389340] [2021-06-04 21:44:25,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:25,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-04 21:44:25,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:25,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:25,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:26,152 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:26,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614389340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:26,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:26,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:44:26,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986529851] [2021-06-04 21:44:26,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:26,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:26,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:26,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:26,153 INFO L87 Difference]: Start difference. First operand 3013 states and 8253 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:26,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:26,692 INFO L93 Difference]: Finished difference Result 4731 states and 11892 transitions. [2021-06-04 21:44:26,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:44:26,693 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:26,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:26,697 INFO L225 Difference]: With dead ends: 4731 [2021-06-04 21:44:26,697 INFO L226 Difference]: Without dead ends: 4461 [2021-06-04 21:44:26,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 616.4ms TimeCoverageRelationStatistics Valid=696, Invalid=2166, Unknown=0, NotChecked=0, Total=2862 [2021-06-04 21:44:26,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4461 states. [2021-06-04 21:44:26,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4461 to 3088. [2021-06-04 21:44:26,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 2.746355685131195) internal successors, (8478), 3087 states have internal predecessors, (8478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:26,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8478 transitions. [2021-06-04 21:44:26,742 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8478 transitions. Word has length 130 [2021-06-04 21:44:26,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:26,742 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8478 transitions. [2021-06-04 21:44:26,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:26,742 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8478 transitions. [2021-06-04 21:44:26,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:26,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:26,744 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:26,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:26,945 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:26,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:26,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1140168531, now seen corresponding path program 190 times [2021-06-04 21:44:26,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:26,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331298392] [2021-06-04 21:44:26,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:27,158 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:27,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:27,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331298392] [2021-06-04 21:44:27,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331298392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:27,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509139027] [2021-06-04 21:44:27,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:27,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:44:27,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:27,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:27,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:27,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509139027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:27,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:27,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:44:27,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748916832] [2021-06-04 21:44:27,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:27,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:27,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:27,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:27,380 INFO L87 Difference]: Start difference. First operand 3088 states and 8478 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:27,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:27,862 INFO L93 Difference]: Finished difference Result 4756 states and 12017 transitions. [2021-06-04 21:44:27,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:44:27,862 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:27,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:27,866 INFO L225 Difference]: With dead ends: 4756 [2021-06-04 21:44:27,866 INFO L226 Difference]: Without dead ends: 4486 [2021-06-04 21:44:27,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 525.3ms TimeCoverageRelationStatistics Valid=642, Invalid=2010, Unknown=0, NotChecked=0, Total=2652 [2021-06-04 21:44:27,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2021-06-04 21:44:27,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 3163. [2021-06-04 21:44:27,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3163 states, 3162 states have (on average 2.752371916508539) internal successors, (8703), 3162 states have internal predecessors, (8703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:27,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 8703 transitions. [2021-06-04 21:44:27,899 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 8703 transitions. Word has length 130 [2021-06-04 21:44:27,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:27,899 INFO L482 AbstractCegarLoop]: Abstraction has 3163 states and 8703 transitions. [2021-06-04 21:44:27,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:27,899 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 8703 transitions. [2021-06-04 21:44:27,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:27,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:27,901 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:28,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:28,102 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:28,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:28,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1520612483, now seen corresponding path program 191 times [2021-06-04 21:44:28,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:28,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325521] [2021-06-04 21:44:28,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:28,323 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:28,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:28,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325521] [2021-06-04 21:44:28,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:28,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620328453] [2021-06-04 21:44:28,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:28,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-04 21:44:28,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:28,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:28,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:28,576 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:28,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620328453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:28,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:28,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:44:28,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825980581] [2021-06-04 21:44:28,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:28,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:28,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:28,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:28,577 INFO L87 Difference]: Start difference. First operand 3163 states and 8703 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:29,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:29,182 INFO L93 Difference]: Finished difference Result 4781 states and 12142 transitions. [2021-06-04 21:44:29,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:44:29,182 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:29,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:29,186 INFO L225 Difference]: With dead ends: 4781 [2021-06-04 21:44:29,186 INFO L226 Difference]: Without dead ends: 4511 [2021-06-04 21:44:29,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 646.1ms TimeCoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2021-06-04 21:44:29,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-06-04 21:44:29,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3238. [2021-06-04 21:44:29,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3238 states, 3237 states have (on average 2.7581093605189992) internal successors, (8928), 3237 states have internal predecessors, (8928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:29,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3238 states to 3238 states and 8928 transitions. [2021-06-04 21:44:29,219 INFO L78 Accepts]: Start accepts. Automaton has 3238 states and 8928 transitions. Word has length 130 [2021-06-04 21:44:29,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:29,219 INFO L482 AbstractCegarLoop]: Abstraction has 3238 states and 8928 transitions. [2021-06-04 21:44:29,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:29,219 INFO L276 IsEmpty]: Start isEmpty. Operand 3238 states and 8928 transitions. [2021-06-04 21:44:29,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:29,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:29,221 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:29,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-04 21:44:29,421 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:29,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:29,422 INFO L82 PathProgramCache]: Analyzing trace with hash -896237333, now seen corresponding path program 192 times [2021-06-04 21:44:29,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:29,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569183493] [2021-06-04 21:44:29,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:29,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:29,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:29,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569183493] [2021-06-04 21:44:29,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569183493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:29,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732020067] [2021-06-04 21:44:29,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:29,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-04 21:44:29,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:29,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:29,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:29,856 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:29,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732020067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:29,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:29,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:44:29,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905129771] [2021-06-04 21:44:29,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:29,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:29,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:29,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:29,857 INFO L87 Difference]: Start difference. First operand 3238 states and 8928 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:30,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:30,372 INFO L93 Difference]: Finished difference Result 4806 states and 12267 transitions. [2021-06-04 21:44:30,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:44:30,373 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:30,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:30,377 INFO L225 Difference]: With dead ends: 4806 [2021-06-04 21:44:30,377 INFO L226 Difference]: Without dead ends: 4536 [2021-06-04 21:44:30,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 551.7ms TimeCoverageRelationStatistics Valid=679, Invalid=2183, Unknown=0, NotChecked=0, Total=2862 [2021-06-04 21:44:30,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2021-06-04 21:44:30,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 3313. [2021-06-04 21:44:30,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3313 states, 3312 states have (on average 2.7635869565217392) internal successors, (9153), 3312 states have internal predecessors, (9153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:30,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3313 states to 3313 states and 9153 transitions. [2021-06-04 21:44:30,409 INFO L78 Accepts]: Start accepts. Automaton has 3313 states and 9153 transitions. Word has length 130 [2021-06-04 21:44:30,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:30,409 INFO L482 AbstractCegarLoop]: Abstraction has 3313 states and 9153 transitions. [2021-06-04 21:44:30,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:30,409 INFO L276 IsEmpty]: Start isEmpty. Operand 3313 states and 9153 transitions. [2021-06-04 21:44:30,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:30,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:30,412 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:30,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-04 21:44:30,612 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:30,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:30,612 INFO L82 PathProgramCache]: Analyzing trace with hash -87185477, now seen corresponding path program 193 times [2021-06-04 21:44:30,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:30,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819735594] [2021-06-04 21:44:30,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:30,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:30,855 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:30,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:30,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819735594] [2021-06-04 21:44:30,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819735594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:30,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214770226] [2021-06-04 21:44:30,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:30,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:30,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:31,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214770226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:31,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:31,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:44:31,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342844061] [2021-06-04 21:44:31,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:31,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:31,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:31,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:31,087 INFO L87 Difference]: Start difference. First operand 3313 states and 9153 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:31,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:31,766 INFO L93 Difference]: Finished difference Result 4831 states and 12392 transitions. [2021-06-04 21:44:31,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:44:31,767 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:31,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:31,771 INFO L225 Difference]: With dead ends: 4831 [2021-06-04 21:44:31,771 INFO L226 Difference]: Without dead ends: 4561 [2021-06-04 21:44:31,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 715.4ms TimeCoverageRelationStatistics Valid=770, Invalid=2536, Unknown=0, NotChecked=0, Total=3306 [2021-06-04 21:44:31,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-06-04 21:44:31,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3388. [2021-06-04 21:44:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3388 states, 3387 states have (on average 2.7688219663418954) internal successors, (9378), 3387 states have internal predecessors, (9378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:31,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 9378 transitions. [2021-06-04 21:44:31,804 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 9378 transitions. Word has length 130 [2021-06-04 21:44:31,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:31,804 INFO L482 AbstractCegarLoop]: Abstraction has 3388 states and 9378 transitions. [2021-06-04 21:44:31,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:31,804 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 9378 transitions. [2021-06-04 21:44:31,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:31,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:31,807 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:32,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-04 21:44:32,007 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:32,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:32,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1479135575, now seen corresponding path program 194 times [2021-06-04 21:44:32,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:32,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228905879] [2021-06-04 21:44:32,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:32,214 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:32,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:32,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228905879] [2021-06-04 21:44:32,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228905879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:32,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866441210] [2021-06-04 21:44:32,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:32,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:44:32,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:32,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:32,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:32,432 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:32,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866441210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:32,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:32,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:44:32,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230999752] [2021-06-04 21:44:32,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:32,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:32,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:32,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:32,433 INFO L87 Difference]: Start difference. First operand 3388 states and 9378 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:33,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:33,042 INFO L93 Difference]: Finished difference Result 4856 states and 12517 transitions. [2021-06-04 21:44:33,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:44:33,043 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:33,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:33,047 INFO L225 Difference]: With dead ends: 4856 [2021-06-04 21:44:33,047 INFO L226 Difference]: Without dead ends: 4586 [2021-06-04 21:44:33,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 602.2ms TimeCoverageRelationStatistics Valid=732, Invalid=2348, Unknown=0, NotChecked=0, Total=3080 [2021-06-04 21:44:33,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4586 states. [2021-06-04 21:44:33,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4586 to 3463. [2021-06-04 21:44:33,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3463 states, 3462 states have (on average 2.7738301559792027) internal successors, (9603), 3462 states have internal predecessors, (9603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:33,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 9603 transitions. [2021-06-04 21:44:33,092 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 9603 transitions. Word has length 130 [2021-06-04 21:44:33,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:33,093 INFO L482 AbstractCegarLoop]: Abstraction has 3463 states and 9603 transitions. [2021-06-04 21:44:33,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:33,093 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 9603 transitions. [2021-06-04 21:44:33,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:33,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:33,095 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:33,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-04 21:44:33,296 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:33,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:33,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1724212871, now seen corresponding path program 195 times [2021-06-04 21:44:33,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:33,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552209798] [2021-06-04 21:44:33,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:33,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:33,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:33,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552209798] [2021-06-04 21:44:33,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552209798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:33,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218849938] [2021-06-04 21:44:33,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:33,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-04 21:44:33,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:33,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:33,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:33,757 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:33,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218849938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:33,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:33,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:44:33,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723807663] [2021-06-04 21:44:33,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:33,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:33,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:33,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:33,758 INFO L87 Difference]: Start difference. First operand 3463 states and 9603 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:34,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:34,465 INFO L93 Difference]: Finished difference Result 4881 states and 12642 transitions. [2021-06-04 21:44:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:44:34,465 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:34,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:34,470 INFO L225 Difference]: With dead ends: 4881 [2021-06-04 21:44:34,470 INFO L226 Difference]: Without dead ends: 4611 [2021-06-04 21:44:34,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 721.0ms TimeCoverageRelationStatistics Valid=831, Invalid=2709, Unknown=0, NotChecked=0, Total=3540 [2021-06-04 21:44:34,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4611 states. [2021-06-04 21:44:34,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4611 to 3538. [2021-06-04 21:44:34,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3538 states, 3537 states have (on average 2.7786259541984735) internal successors, (9828), 3537 states have internal predecessors, (9828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:34,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 9828 transitions. [2021-06-04 21:44:34,507 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 9828 transitions. Word has length 130 [2021-06-04 21:44:34,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:34,507 INFO L482 AbstractCegarLoop]: Abstraction has 3538 states and 9828 transitions. [2021-06-04 21:44:34,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:34,507 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 9828 transitions. [2021-06-04 21:44:34,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:34,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:34,510 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:34,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:34,710 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:34,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:34,711 INFO L82 PathProgramCache]: Analyzing trace with hash -2101063193, now seen corresponding path program 196 times [2021-06-04 21:44:34,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:34,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188534986] [2021-06-04 21:44:34,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:34,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:34,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:34,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188534986] [2021-06-04 21:44:34,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188534986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:34,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225271329] [2021-06-04 21:44:34,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:34,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:44:34,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:34,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:34,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:35,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225271329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:35,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:35,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:44:35,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421788168] [2021-06-04 21:44:35,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:35,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:35,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:35,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:35,144 INFO L87 Difference]: Start difference. First operand 3538 states and 9828 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:35,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:35,759 INFO L93 Difference]: Finished difference Result 4906 states and 12767 transitions. [2021-06-04 21:44:35,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:44:35,759 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:35,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:35,764 INFO L225 Difference]: With dead ends: 4906 [2021-06-04 21:44:35,764 INFO L226 Difference]: Without dead ends: 4636 [2021-06-04 21:44:35,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 607.6ms TimeCoverageRelationStatistics Valid=801, Invalid=2505, Unknown=0, NotChecked=0, Total=3306 [2021-06-04 21:44:35,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4636 states. [2021-06-04 21:44:35,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4636 to 3613. [2021-06-04 21:44:35,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 3612 states have (on average 2.7832225913621262) internal successors, (10053), 3612 states have internal predecessors, (10053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:35,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 10053 transitions. [2021-06-04 21:44:35,803 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 10053 transitions. Word has length 130 [2021-06-04 21:44:35,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:35,803 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 10053 transitions. [2021-06-04 21:44:35,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:35,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 10053 transitions. [2021-06-04 21:44:35,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:35,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:35,806 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:36,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-04 21:44:36,007 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:36,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:36,007 INFO L82 PathProgramCache]: Analyzing trace with hash -774307657, now seen corresponding path program 197 times [2021-06-04 21:44:36,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:36,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619237200] [2021-06-04 21:44:36,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:36,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:36,218 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:36,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:36,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619237200] [2021-06-04 21:44:36,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619237200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:36,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616113148] [2021-06-04 21:44:36,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:36,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-04 21:44:36,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:36,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:36,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:36,450 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:36,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616113148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:36,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:36,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:44:36,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681043756] [2021-06-04 21:44:36,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:36,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:36,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:36,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:36,451 INFO L87 Difference]: Start difference. First operand 3613 states and 10053 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:37,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:37,221 INFO L93 Difference]: Finished difference Result 4931 states and 12892 transitions. [2021-06-04 21:44:37,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:44:37,221 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:37,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:37,226 INFO L225 Difference]: With dead ends: 4931 [2021-06-04 21:44:37,226 INFO L226 Difference]: Without dead ends: 4661 [2021-06-04 21:44:37,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 768.5ms TimeCoverageRelationStatistics Valid=908, Invalid=2874, Unknown=0, NotChecked=0, Total=3782 [2021-06-04 21:44:37,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4661 states. [2021-06-04 21:44:37,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4661 to 3688. [2021-06-04 21:44:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3688 states, 3687 states have (on average 2.787632221318145) internal successors, (10278), 3687 states have internal predecessors, (10278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:37,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 10278 transitions. [2021-06-04 21:44:37,264 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 10278 transitions. Word has length 130 [2021-06-04 21:44:37,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:37,264 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 10278 transitions. [2021-06-04 21:44:37,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:37,264 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 10278 transitions. [2021-06-04 21:44:37,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:37,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:37,267 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:37,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:37,467 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:37,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:37,468 INFO L82 PathProgramCache]: Analyzing trace with hash -320091483, now seen corresponding path program 198 times [2021-06-04 21:44:37,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:37,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288436069] [2021-06-04 21:44:37,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:37,680 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:37,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:37,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288436069] [2021-06-04 21:44:37,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288436069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:37,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858682902] [2021-06-04 21:44:37,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:37,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-04 21:44:37,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:37,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:37,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:37,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858682902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:37,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:37,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:44:37,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789680613] [2021-06-04 21:44:37,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:37,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:37,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:37,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:37,900 INFO L87 Difference]: Start difference. First operand 3688 states and 10278 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:38,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:38,543 INFO L93 Difference]: Finished difference Result 4956 states and 13017 transitions. [2021-06-04 21:44:38,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:44:38,543 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:38,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:38,548 INFO L225 Difference]: With dead ends: 4956 [2021-06-04 21:44:38,548 INFO L226 Difference]: Without dead ends: 4686 [2021-06-04 21:44:38,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 632.0ms TimeCoverageRelationStatistics Valid=886, Invalid=2654, Unknown=0, NotChecked=0, Total=3540 [2021-06-04 21:44:38,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4686 states. [2021-06-04 21:44:38,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4686 to 3763. [2021-06-04 21:44:38,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3763 states, 3762 states have (on average 2.791866028708134) internal successors, (10503), 3762 states have internal predecessors, (10503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:38,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 10503 transitions. [2021-06-04 21:44:38,587 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 10503 transitions. Word has length 130 [2021-06-04 21:44:38,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:38,587 INFO L482 AbstractCegarLoop]: Abstraction has 3763 states and 10503 transitions. [2021-06-04 21:44:38,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:38,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 10503 transitions. [2021-06-04 21:44:38,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:38,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:38,590 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:38,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-04 21:44:38,791 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:38,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:38,791 INFO L82 PathProgramCache]: Analyzing trace with hash 678804853, now seen corresponding path program 199 times [2021-06-04 21:44:38,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:38,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49667162] [2021-06-04 21:44:38,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:38,985 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:38,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:38,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49667162] [2021-06-04 21:44:38,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49667162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:38,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807721267] [2021-06-04 21:44:38,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:39,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:39,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:39,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807721267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:39,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:39,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:44:39,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075403725] [2021-06-04 21:44:39,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:39,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:39,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:39,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:39,212 INFO L87 Difference]: Start difference. First operand 3763 states and 10503 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:40,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:40,044 INFO L93 Difference]: Finished difference Result 4981 states and 13142 transitions. [2021-06-04 21:44:40,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:44:40,044 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:40,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:40,048 INFO L225 Difference]: With dead ends: 4981 [2021-06-04 21:44:40,048 INFO L226 Difference]: Without dead ends: 4711 [2021-06-04 21:44:40,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 812.5ms TimeCoverageRelationStatistics Valid=1001, Invalid=3031, Unknown=0, NotChecked=0, Total=4032 [2021-06-04 21:44:40,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4711 states. [2021-06-04 21:44:40,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4711 to 3838. [2021-06-04 21:44:40,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.7959343236903833) internal successors, (10728), 3837 states have internal predecessors, (10728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:40,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 10728 transitions. [2021-06-04 21:44:40,086 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 10728 transitions. Word has length 130 [2021-06-04 21:44:40,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:40,086 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 10728 transitions. [2021-06-04 21:44:40,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:40,086 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 10728 transitions. [2021-06-04 21:44:40,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:40,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:40,089 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:40,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:40,289 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:40,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:40,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1200523037, now seen corresponding path program 200 times [2021-06-04 21:44:40,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:40,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028375270] [2021-06-04 21:44:40,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:40,508 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:40,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:40,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028375270] [2021-06-04 21:44:40,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028375270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:40,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942353130] [2021-06-04 21:44:40,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:40,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:44:40,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:40,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:40,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:40,766 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:40,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942353130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:40,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:40,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:44:40,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059904092] [2021-06-04 21:44:40,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:40,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:40,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:40,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:40,768 INFO L87 Difference]: Start difference. First operand 3838 states and 10728 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:41,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:41,487 INFO L93 Difference]: Finished difference Result 5006 states and 13267 transitions. [2021-06-04 21:44:41,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:44:41,487 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:41,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:41,492 INFO L225 Difference]: With dead ends: 5006 [2021-06-04 21:44:41,492 INFO L226 Difference]: Without dead ends: 4736 [2021-06-04 21:44:41,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 681.6ms TimeCoverageRelationStatistics Valid=987, Invalid=2795, Unknown=0, NotChecked=0, Total=3782 [2021-06-04 21:44:41,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4736 states. [2021-06-04 21:44:41,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4736 to 3913. [2021-06-04 21:44:41,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3912 states have (on average 2.7998466257668713) internal successors, (10953), 3912 states have internal predecessors, (10953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:41,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 10953 transitions. [2021-06-04 21:44:41,531 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 10953 transitions. Word has length 130 [2021-06-04 21:44:41,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:41,531 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 10953 transitions. [2021-06-04 21:44:41,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:41,531 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 10953 transitions. [2021-06-04 21:44:41,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:41,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:41,534 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:41,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:41,735 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:41,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:41,735 INFO L82 PathProgramCache]: Analyzing trace with hash 829796275, now seen corresponding path program 201 times [2021-06-04 21:44:41,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:41,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222461535] [2021-06-04 21:44:41,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:41,928 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:41,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:41,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222461535] [2021-06-04 21:44:41,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222461535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:41,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388221362] [2021-06-04 21:44:41,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:41,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-04 21:44:41,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:41,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:42,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:42,184 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:42,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388221362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:42,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:42,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:44:42,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852969192] [2021-06-04 21:44:42,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:42,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:42,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:42,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:42,185 INFO L87 Difference]: Start difference. First operand 3913 states and 10953 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:43,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:43,065 INFO L93 Difference]: Finished difference Result 5031 states and 13392 transitions. [2021-06-04 21:44:43,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:44:43,065 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:43,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:43,070 INFO L225 Difference]: With dead ends: 5031 [2021-06-04 21:44:43,070 INFO L226 Difference]: Without dead ends: 4761 [2021-06-04 21:44:43,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 840.4ms TimeCoverageRelationStatistics Valid=1110, Invalid=3180, Unknown=0, NotChecked=0, Total=4290 [2021-06-04 21:44:43,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4761 states. [2021-06-04 21:44:43,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4761 to 3988. [2021-06-04 21:44:43,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3988 states, 3987 states have (on average 2.8036117381489842) internal successors, (11178), 3987 states have internal predecessors, (11178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:43,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3988 states to 3988 states and 11178 transitions. [2021-06-04 21:44:43,111 INFO L78 Accepts]: Start accepts. Automaton has 3988 states and 11178 transitions. Word has length 130 [2021-06-04 21:44:43,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:43,111 INFO L482 AbstractCegarLoop]: Abstraction has 3988 states and 11178 transitions. [2021-06-04 21:44:43,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:43,111 INFO L276 IsEmpty]: Start isEmpty. Operand 3988 states and 11178 transitions. [2021-06-04 21:44:43,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:43,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:43,114 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:43,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:43,314 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:43,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:43,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1444035745, now seen corresponding path program 202 times [2021-06-04 21:44:43,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:43,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969810280] [2021-06-04 21:44:43,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:43,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:43,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:43,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969810280] [2021-06-04 21:44:43,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969810280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:43,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480943526] [2021-06-04 21:44:43,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:43,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:44:43,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:43,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:43,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:43,716 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:43,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480943526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:43,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:43,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:44:43,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307478814] [2021-06-04 21:44:43,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:43,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:43,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:43,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:43,717 INFO L87 Difference]: Start difference. First operand 3988 states and 11178 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:44,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:44,468 INFO L93 Difference]: Finished difference Result 5056 states and 13517 transitions. [2021-06-04 21:44:44,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:44:44,468 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:44,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:44,473 INFO L225 Difference]: With dead ends: 5056 [2021-06-04 21:44:44,473 INFO L226 Difference]: Without dead ends: 4786 [2021-06-04 21:44:44,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 696.1ms TimeCoverageRelationStatistics Valid=1104, Invalid=2928, Unknown=0, NotChecked=0, Total=4032 [2021-06-04 21:44:44,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-06-04 21:44:44,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 4063. [2021-06-04 21:44:44,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4063 states, 4062 states have (on average 2.807237813884786) internal successors, (11403), 4062 states have internal predecessors, (11403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:44,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4063 states to 4063 states and 11403 transitions. [2021-06-04 21:44:44,537 INFO L78 Accepts]: Start accepts. Automaton has 4063 states and 11403 transitions. Word has length 130 [2021-06-04 21:44:44,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:44,537 INFO L482 AbstractCegarLoop]: Abstraction has 4063 states and 11403 transitions. [2021-06-04 21:44:44,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:44,537 INFO L276 IsEmpty]: Start isEmpty. Operand 4063 states and 11403 transitions. [2021-06-04 21:44:44,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:44,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:44,540 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:44,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-04 21:44:44,741 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:44,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:44,741 INFO L82 PathProgramCache]: Analyzing trace with hash -271206543, now seen corresponding path program 203 times [2021-06-04 21:44:44,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:44,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428113121] [2021-06-04 21:44:44,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:44,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:44,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428113121] [2021-06-04 21:44:44,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428113121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:44,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664181588] [2021-06-04 21:44:44,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:44,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-04 21:44:44,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:44,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:44,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:45,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664181588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:45,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:45,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:44:45,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479189616] [2021-06-04 21:44:45,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:45,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:45,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:45,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:45,160 INFO L87 Difference]: Start difference. First operand 4063 states and 11403 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:46,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:46,101 INFO L93 Difference]: Finished difference Result 5141 states and 13807 transitions. [2021-06-04 21:44:46,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-04 21:44:46,102 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:46,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:46,107 INFO L225 Difference]: With dead ends: 5141 [2021-06-04 21:44:46,107 INFO L226 Difference]: Without dead ends: 4871 [2021-06-04 21:44:46,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 892.1ms TimeCoverageRelationStatistics Valid=1235, Invalid=3321, Unknown=0, NotChecked=0, Total=4556 [2021-06-04 21:44:46,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2021-06-04 21:44:46,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 4138. [2021-06-04 21:44:46,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4138 states, 4137 states have (on average 2.8155668358714045) internal successors, (11648), 4137 states have internal predecessors, (11648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:46,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 11648 transitions. [2021-06-04 21:44:46,150 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 11648 transitions. Word has length 130 [2021-06-04 21:44:46,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:46,150 INFO L482 AbstractCegarLoop]: Abstraction has 4138 states and 11648 transitions. [2021-06-04 21:44:46,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:46,151 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 11648 transitions. [2021-06-04 21:44:46,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:46,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:46,154 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:46,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-04 21:44:46,354 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:46,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:46,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1303854145, now seen corresponding path program 204 times [2021-06-04 21:44:46,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:46,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382756741] [2021-06-04 21:44:46,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:46,551 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:46,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:46,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382756741] [2021-06-04 21:44:46,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382756741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:46,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887153226] [2021-06-04 21:44:46,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:46,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-04 21:44:46,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:46,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:44:46,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:46,767 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:46,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887153226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:46,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:46,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:44:46,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16723620] [2021-06-04 21:44:46,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:46,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:46,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:46,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:46,768 INFO L87 Difference]: Start difference. First operand 4138 states and 11648 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:47,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:47,570 INFO L93 Difference]: Finished difference Result 5908 states and 15981 transitions. [2021-06-04 21:44:47,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:44:47,571 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:47,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:47,576 INFO L225 Difference]: With dead ends: 5908 [2021-06-04 21:44:47,576 INFO L226 Difference]: Without dead ends: 5638 [2021-06-04 21:44:47,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 764.4ms TimeCoverageRelationStatistics Valid=1238, Invalid=3052, Unknown=0, NotChecked=0, Total=4290 [2021-06-04 21:44:47,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5638 states. [2021-06-04 21:44:47,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5638 to 4318. [2021-06-04 21:44:47,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4318 states, 4317 states have (on average 2.8276580958999307) internal successors, (12207), 4317 states have internal predecessors, (12207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:47,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4318 states to 4318 states and 12207 transitions. [2021-06-04 21:44:47,619 INFO L78 Accepts]: Start accepts. Automaton has 4318 states and 12207 transitions. Word has length 130 [2021-06-04 21:44:47,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:47,619 INFO L482 AbstractCegarLoop]: Abstraction has 4318 states and 12207 transitions. [2021-06-04 21:44:47,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:47,619 INFO L276 IsEmpty]: Start isEmpty. Operand 4318 states and 12207 transitions. [2021-06-04 21:44:47,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:47,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:47,622 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:47,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-04 21:44:47,823 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:47,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:47,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1281510895, now seen corresponding path program 205 times [2021-06-04 21:44:47,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:47,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839239332] [2021-06-04 21:44:47,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:48,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:48,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839239332] [2021-06-04 21:44:48,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839239332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:48,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808560326] [2021-06-04 21:44:48,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:48,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:48,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:48,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808560326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:48,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:48,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-06-04 21:44:48,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089519238] [2021-06-04 21:44:48,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-04 21:44:48,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:48,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-04 21:44:48,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:44:48,249 INFO L87 Difference]: Start difference. First operand 4318 states and 12207 transitions. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:49,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:49,303 INFO L93 Difference]: Finished difference Result 5851 states and 15841 transitions. [2021-06-04 21:44:49,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-04 21:44:49,303 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-04 21:44:49,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:49,307 INFO L225 Difference]: With dead ends: 5851 [2021-06-04 21:44:49,307 INFO L226 Difference]: Without dead ends: 5276 [2021-06-04 21:44:49,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 1005.1ms TimeCoverageRelationStatistics Valid=1449, Invalid=3953, Unknown=0, NotChecked=0, Total=5402 [2021-06-04 21:44:49,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5276 states. [2021-06-04 21:44:49,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5276 to 4353. [2021-06-04 21:44:49,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:49,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-04 21:44:49,344 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 130 [2021-06-04 21:44:49,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:49,344 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-04 21:44:49,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:49,344 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-04 21:44:49,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:44:49,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:49,347 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:49,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-04 21:44:49,548 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:49,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:49,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1365615058, now seen corresponding path program 206 times [2021-06-04 21:44:49,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:49,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741562929] [2021-06-04 21:44:49,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:49,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:49,793 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:49,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:49,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741562929] [2021-06-04 21:44:49,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741562929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:49,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393224441] [2021-06-04 21:44:49,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:49,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:44:49,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:49,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:44:49,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:50,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393224441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:50,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:50,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-04 21:44:50,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027841797] [2021-06-04 21:44:50,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:50,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:50,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:50,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:50,038 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:50,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:50,527 INFO L93 Difference]: Finished difference Result 5696 states and 15097 transitions. [2021-06-04 21:44:50,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:44:50,528 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-04 21:44:50,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:50,533 INFO L225 Difference]: With dead ends: 5696 [2021-06-04 21:44:50,533 INFO L226 Difference]: Without dead ends: 5426 [2021-06-04 21:44:50,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 540.7ms TimeCoverageRelationStatistics Valid=687, Invalid=1965, Unknown=0, NotChecked=0, Total=2652 [2021-06-04 21:44:50,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-06-04 21:44:50,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 4353. [2021-06-04 21:44:50,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:50,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-04 21:44:50,572 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-04 21:44:50,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:50,572 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-04 21:44:50,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:50,573 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-04 21:44:50,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:44:50,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:50,575 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:50,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-04 21:44:50,776 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:50,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:50,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1066754, now seen corresponding path program 207 times [2021-06-04 21:44:50,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:50,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571204348] [2021-06-04 21:44:50,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:51,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:51,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571204348] [2021-06-04 21:44:51,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571204348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:51,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128324816] [2021-06-04 21:44:51,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:51,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-04 21:44:51,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:51,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:44:51,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:51,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128324816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:51,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:51,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-04 21:44:51,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920874843] [2021-06-04 21:44:51,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-04 21:44:51,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:51,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-04 21:44:51,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:44:51,300 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:51,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:51,834 INFO L93 Difference]: Finished difference Result 6141 states and 15987 transitions. [2021-06-04 21:44:51,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:44:51,834 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-04 21:44:51,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:51,840 INFO L225 Difference]: With dead ends: 6141 [2021-06-04 21:44:51,840 INFO L226 Difference]: Without dead ends: 5871 [2021-06-04 21:44:51,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 618.3ms TimeCoverageRelationStatistics Valid=743, Invalid=2227, Unknown=0, NotChecked=0, Total=2970 [2021-06-04 21:44:51,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5871 states. [2021-06-04 21:44:51,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5871 to 4353. [2021-06-04 21:44:51,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:51,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-04 21:44:51,881 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-04 21:44:51,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:51,881 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-04 21:44:51,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:51,881 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-04 21:44:51,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:44:51,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:51,884 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:52,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:52,084 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:52,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:52,085 INFO L82 PathProgramCache]: Analyzing trace with hash 2016668524, now seen corresponding path program 208 times [2021-06-04 21:44:52,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:52,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790231691] [2021-06-04 21:44:52,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:52,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:52,318 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:52,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:52,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790231691] [2021-06-04 21:44:52,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790231691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:52,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498351771] [2021-06-04 21:44:52,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:52,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:44:52,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:52,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:44:52,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:52,571 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:52,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498351771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:52,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:52,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-04 21:44:52,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595025636] [2021-06-04 21:44:52,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:52,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:52,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:52,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:52,573 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:53,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:53,070 INFO L93 Difference]: Finished difference Result 6096 states and 15897 transitions. [2021-06-04 21:44:53,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:44:53,071 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-04 21:44:53,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:53,076 INFO L225 Difference]: With dead ends: 6096 [2021-06-04 21:44:53,076 INFO L226 Difference]: Without dead ends: 5826 [2021-06-04 21:44:53,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 560.9ms TimeCoverageRelationStatistics Valid=741, Invalid=2229, Unknown=0, NotChecked=0, Total=2970 [2021-06-04 21:44:53,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5826 states. [2021-06-04 21:44:53,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5826 to 4353. [2021-06-04 21:44:53,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:53,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-04 21:44:53,118 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-04 21:44:53,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:53,118 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-04 21:44:53,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:53,118 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-04 21:44:53,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:44:53,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:53,121 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:53,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-04 21:44:53,322 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:53,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:53,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1118145084, now seen corresponding path program 209 times [2021-06-04 21:44:53,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:53,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255005646] [2021-06-04 21:44:53,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:53,566 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:53,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:53,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255005646] [2021-06-04 21:44:53,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255005646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:53,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862560538] [2021-06-04 21:44:53,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:53,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-04 21:44:53,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:53,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:44:53,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:53,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862560538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:53,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:53,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-04 21:44:53,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231285326] [2021-06-04 21:44:53,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-04 21:44:53,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:53,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-04 21:44:53,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:44:53,842 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:54,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:54,448 INFO L93 Difference]: Finished difference Result 6046 states and 15797 transitions. [2021-06-04 21:44:54,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:44:54,448 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-04 21:44:54,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:54,454 INFO L225 Difference]: With dead ends: 6046 [2021-06-04 21:44:54,454 INFO L226 Difference]: Without dead ends: 5776 [2021-06-04 21:44:54,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 640.6ms TimeCoverageRelationStatistics Valid=763, Invalid=2429, Unknown=0, NotChecked=0, Total=3192 [2021-06-04 21:44:54,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5776 states. [2021-06-04 21:44:54,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5776 to 4353. [2021-06-04 21:44:54,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:54,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-04 21:44:54,495 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-04 21:44:54,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:54,495 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-04 21:44:54,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:54,495 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-04 21:44:54,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:44:54,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:54,498 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:54,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:54,699 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:54,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:54,699 INFO L82 PathProgramCache]: Analyzing trace with hash -496808406, now seen corresponding path program 210 times [2021-06-04 21:44:54,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:54,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021878775] [2021-06-04 21:44:54,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:54,938 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:54,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:54,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021878775] [2021-06-04 21:44:54,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021878775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:54,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115886260] [2021-06-04 21:44:54,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:55,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-04 21:44:55,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:55,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:44:55,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:55,193 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:55,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115886260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:55,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:55,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-04 21:44:55,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070357872] [2021-06-04 21:44:55,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:55,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:55,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:55,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:55,194 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:55,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:55,775 INFO L93 Difference]: Finished difference Result 5996 states and 15697 transitions. [2021-06-04 21:44:55,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:44:55,775 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-04 21:44:55,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:55,780 INFO L225 Difference]: With dead ends: 5996 [2021-06-04 21:44:55,781 INFO L226 Difference]: Without dead ends: 5726 [2021-06-04 21:44:55,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 616.0ms TimeCoverageRelationStatistics Valid=775, Invalid=2417, Unknown=0, NotChecked=0, Total=3192 [2021-06-04 21:44:55,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5726 states. [2021-06-04 21:44:55,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5726 to 4353. [2021-06-04 21:44:55,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:55,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-04 21:44:55,821 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-04 21:44:55,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:55,821 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-04 21:44:55,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:55,821 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-04 21:44:55,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:44:55,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:55,824 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:56,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:56,025 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:56,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:56,025 INFO L82 PathProgramCache]: Analyzing trace with hash -877252358, now seen corresponding path program 211 times [2021-06-04 21:44:56,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:56,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828678941] [2021-06-04 21:44:56,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:56,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:56,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828678941] [2021-06-04 21:44:56,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828678941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:56,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308534537] [2021-06-04 21:44:56,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:56,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:56,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:44:56,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:56,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308534537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:56,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:56,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-04 21:44:56,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513431868] [2021-06-04 21:44:56,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-04 21:44:56,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:56,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-04 21:44:56,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:44:56,555 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:57,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:57,189 INFO L93 Difference]: Finished difference Result 5946 states and 15597 transitions. [2021-06-04 21:44:57,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:44:57,190 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-04 21:44:57,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:57,195 INFO L225 Difference]: With dead ends: 5946 [2021-06-04 21:44:57,195 INFO L226 Difference]: Without dead ends: 5676 [2021-06-04 21:44:57,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 700.4ms TimeCoverageRelationStatistics Valid=799, Invalid=2623, Unknown=0, NotChecked=0, Total=3422 [2021-06-04 21:44:57,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5676 states. [2021-06-04 21:44:57,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5676 to 4353. [2021-06-04 21:44:57,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:57,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-04 21:44:57,239 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-04 21:44:57,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:57,239 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-04 21:44:57,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:57,239 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-04 21:44:57,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:44:57,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:57,242 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:57,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:57,443 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:57,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:57,443 INFO L82 PathProgramCache]: Analyzing trace with hash -252877208, now seen corresponding path program 212 times [2021-06-04 21:44:57,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:57,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655504779] [2021-06-04 21:44:57,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:57,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:57,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:57,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655504779] [2021-06-04 21:44:57,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655504779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:57,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624491210] [2021-06-04 21:44:57,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:57,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:44:57,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:57,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:44:57,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:57,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624491210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:57,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:57,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-04 21:44:57,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969041775] [2021-06-04 21:44:57,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:57,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:57,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:57,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:57,886 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:58,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:58,489 INFO L93 Difference]: Finished difference Result 5896 states and 15497 transitions. [2021-06-04 21:44:58,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:44:58,489 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-04 21:44:58,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:58,494 INFO L225 Difference]: With dead ends: 5896 [2021-06-04 21:44:58,494 INFO L226 Difference]: Without dead ends: 5626 [2021-06-04 21:44:58,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 605.4ms TimeCoverageRelationStatistics Valid=825, Invalid=2597, Unknown=0, NotChecked=0, Total=3422 [2021-06-04 21:44:58,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5626 states. [2021-06-04 21:44:58,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5626 to 4353. [2021-06-04 21:44:58,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:58,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-04 21:44:58,531 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-04 21:44:58,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:58,531 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-04 21:44:58,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:58,532 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-04 21:44:58,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:44:58,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:58,535 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:44:58,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:58,735 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:58,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:58,736 INFO L82 PathProgramCache]: Analyzing trace with hash 556174648, now seen corresponding path program 213 times [2021-06-04 21:44:58,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:58,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689680057] [2021-06-04 21:44:58,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:58,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:58,966 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:58,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:58,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689680057] [2021-06-04 21:44:58,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689680057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:58,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069120023] [2021-06-04 21:44:58,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:59,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-04 21:44:59,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:59,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:44:59,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:59,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069120023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:59,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:59,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-04 21:44:59,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106302111] [2021-06-04 21:44:59,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-04 21:44:59,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:59,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-04 21:44:59,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:44:59,212 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:59,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:59,913 INFO L93 Difference]: Finished difference Result 5846 states and 15397 transitions. [2021-06-04 21:44:59,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:44:59,913 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-04 21:44:59,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:59,918 INFO L225 Difference]: With dead ends: 5846 [2021-06-04 21:44:59,918 INFO L226 Difference]: Without dead ends: 5576 [2021-06-04 21:44:59,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 710.4ms TimeCoverageRelationStatistics Valid=851, Invalid=2809, Unknown=0, NotChecked=0, Total=3660 [2021-06-04 21:44:59,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5576 states. [2021-06-04 21:44:59,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5576 to 4353. [2021-06-04 21:44:59,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:59,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-04 21:44:59,958 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-04 21:44:59,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:59,958 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-04 21:44:59,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:59,958 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-04 21:44:59,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:44:59,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:59,961 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:00,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-04 21:45:00,162 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:00,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:00,162 INFO L82 PathProgramCache]: Analyzing trace with hash -835775450, now seen corresponding path program 214 times [2021-06-04 21:45:00,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:00,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663123484] [2021-06-04 21:45:00,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:00,373 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:00,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:00,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663123484] [2021-06-04 21:45:00,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663123484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:00,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401465956] [2021-06-04 21:45:00,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:00,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:45:00,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:00,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:45:00,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:00,604 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:00,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401465956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:00,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:00,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-04 21:45:00,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246649880] [2021-06-04 21:45:00,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:45:00,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:00,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:45:00,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:45:00,605 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:01,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:01,240 INFO L93 Difference]: Finished difference Result 5796 states and 15297 transitions. [2021-06-04 21:45:01,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:45:01,240 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-04 21:45:01,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:01,245 INFO L225 Difference]: With dead ends: 5796 [2021-06-04 21:45:01,246 INFO L226 Difference]: Without dead ends: 5526 [2021-06-04 21:45:01,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 641.7ms TimeCoverageRelationStatistics Valid=891, Invalid=2769, Unknown=0, NotChecked=0, Total=3660 [2021-06-04 21:45:01,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5526 states. [2021-06-04 21:45:01,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5526 to 4353. [2021-06-04 21:45:01,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:01,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-04 21:45:01,285 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-04 21:45:01,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:01,285 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-04 21:45:01,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:01,286 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-04 21:45:01,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:01,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:01,289 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:01,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-04 21:45:01,490 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:01,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:01,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1080852746, now seen corresponding path program 215 times [2021-06-04 21:45:01,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:01,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073360707] [2021-06-04 21:45:01,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:01,717 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:01,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:01,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073360707] [2021-06-04 21:45:01,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073360707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:01,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091655281] [2021-06-04 21:45:01,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:01,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-04 21:45:01,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:01,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:45:01,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:01,957 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:01,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091655281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:01,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:01,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-04 21:45:01,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230717608] [2021-06-04 21:45:01,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-04 21:45:01,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:01,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-04 21:45:01,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:45:01,958 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:02,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:02,723 INFO L93 Difference]: Finished difference Result 5746 states and 15197 transitions. [2021-06-04 21:45:02,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:45:02,724 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-04 21:45:02,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:02,729 INFO L225 Difference]: With dead ends: 5746 [2021-06-04 21:45:02,729 INFO L226 Difference]: Without dead ends: 5476 [2021-06-04 21:45:02,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 779.8ms TimeCoverageRelationStatistics Valid=919, Invalid=2987, Unknown=0, NotChecked=0, Total=3906 [2021-06-04 21:45:02,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5476 states. [2021-06-04 21:45:02,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5476 to 4353. [2021-06-04 21:45:02,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:02,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-04 21:45:02,772 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-04 21:45:02,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:02,773 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-04 21:45:02,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:02,773 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-04 21:45:02,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:02,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:02,776 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:02,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-04 21:45:02,981 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:02,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:02,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1457703068, now seen corresponding path program 216 times [2021-06-04 21:45:02,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:02,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997042551] [2021-06-04 21:45:02,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:02,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:03,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:03,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997042551] [2021-06-04 21:45:03,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997042551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:03,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867515452] [2021-06-04 21:45:03,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:03,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-04 21:45:03,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:03,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:45:03,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:03,578 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:03,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867515452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:03,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:03,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-04 21:45:03,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104199004] [2021-06-04 21:45:03,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:45:03,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:03,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:45:03,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:45:03,579 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:04,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:04,290 INFO L93 Difference]: Finished difference Result 5696 states and 15097 transitions. [2021-06-04 21:45:04,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:45:04,290 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-04 21:45:04,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:04,296 INFO L225 Difference]: With dead ends: 5696 [2021-06-04 21:45:04,296 INFO L226 Difference]: Without dead ends: 5426 [2021-06-04 21:45:04,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 788.2ms TimeCoverageRelationStatistics Valid=973, Invalid=2933, Unknown=0, NotChecked=0, Total=3906 [2021-06-04 21:45:04,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-06-04 21:45:04,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 4353. [2021-06-04 21:45:04,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:04,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-04 21:45:04,339 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-04 21:45:04,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:04,339 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-04 21:45:04,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:04,339 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-04 21:45:04,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:04,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:04,342 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:04,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-04 21:45:04,543 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:04,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:04,543 INFO L82 PathProgramCache]: Analyzing trace with hash -130947532, now seen corresponding path program 217 times [2021-06-04 21:45:04,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:04,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885984331] [2021-06-04 21:45:04,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:04,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:04,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885984331] [2021-06-04 21:45:04,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885984331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:04,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749059153] [2021-06-04 21:45:04,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:04,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:45:04,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:05,043 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:05,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749059153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:05,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:05,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-04 21:45:05,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486751158] [2021-06-04 21:45:05,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-04 21:45:05,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:05,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-04 21:45:05,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:45:05,044 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:05,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:05,904 INFO L93 Difference]: Finished difference Result 5646 states and 14997 transitions. [2021-06-04 21:45:05,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:45:05,904 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-04 21:45:05,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:05,909 INFO L225 Difference]: With dead ends: 5646 [2021-06-04 21:45:05,910 INFO L226 Difference]: Without dead ends: 5376 [2021-06-04 21:45:05,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 872.5ms TimeCoverageRelationStatistics Valid=1003, Invalid=3157, Unknown=0, NotChecked=0, Total=4160 [2021-06-04 21:45:05,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5376 states. [2021-06-04 21:45:05,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5376 to 4353. [2021-06-04 21:45:05,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:05,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-04 21:45:05,963 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-04 21:45:05,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:05,963 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-04 21:45:05,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:05,963 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-04 21:45:05,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:05,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:05,966 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:06,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:06,167 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:06,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:06,167 INFO L82 PathProgramCache]: Analyzing trace with hash 323268642, now seen corresponding path program 218 times [2021-06-04 21:45:06,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:06,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998317975] [2021-06-04 21:45:06,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:06,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:06,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998317975] [2021-06-04 21:45:06,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998317975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:06,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038914840] [2021-06-04 21:45:06,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:06,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:45:06,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:06,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:45:06,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:06,640 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:06,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038914840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:06,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:06,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-04 21:45:06,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689999894] [2021-06-04 21:45:06,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:45:06,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:06,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:45:06,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:45:06,642 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:07,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:07,372 INFO L93 Difference]: Finished difference Result 5596 states and 14897 transitions. [2021-06-04 21:45:07,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:45:07,372 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-04 21:45:07,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:07,378 INFO L225 Difference]: With dead ends: 5596 [2021-06-04 21:45:07,378 INFO L226 Difference]: Without dead ends: 5326 [2021-06-04 21:45:07,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 709.8ms TimeCoverageRelationStatistics Valid=1071, Invalid=3089, Unknown=0, NotChecked=0, Total=4160 [2021-06-04 21:45:07,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2021-06-04 21:45:07,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 4353. [2021-06-04 21:45:07,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:07,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-04 21:45:07,423 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-04 21:45:07,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:07,423 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-04 21:45:07,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:07,423 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-04 21:45:07,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:07,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:07,426 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:07,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-06-04 21:45:07,627 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:07,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:07,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1322164978, now seen corresponding path program 219 times [2021-06-04 21:45:07,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:07,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785584409] [2021-06-04 21:45:07,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:07,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:07,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785584409] [2021-06-04 21:45:07,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785584409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:07,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448143176] [2021-06-04 21:45:07,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:07,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-04 21:45:07,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:07,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:45:07,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:08,086 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:08,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448143176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:08,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:08,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-04 21:45:08,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394384592] [2021-06-04 21:45:08,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-04 21:45:08,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:08,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-04 21:45:08,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:45:08,087 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:09,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:09,062 INFO L93 Difference]: Finished difference Result 5546 states and 14797 transitions. [2021-06-04 21:45:09,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:45:09,062 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-04 21:45:09,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:09,067 INFO L225 Difference]: With dead ends: 5546 [2021-06-04 21:45:09,067 INFO L226 Difference]: Without dead ends: 5276 [2021-06-04 21:45:09,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 899.1ms TimeCoverageRelationStatistics Valid=1103, Invalid=3319, Unknown=0, NotChecked=0, Total=4422 [2021-06-04 21:45:09,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5276 states. [2021-06-04 21:45:09,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5276 to 4353. [2021-06-04 21:45:09,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:09,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-04 21:45:09,108 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-04 21:45:09,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:09,108 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-04 21:45:09,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:09,108 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-04 21:45:09,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:09,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:09,111 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:09,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:09,312 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:09,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:09,312 INFO L82 PathProgramCache]: Analyzing trace with hash -557162912, now seen corresponding path program 220 times [2021-06-04 21:45:09,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:09,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244759592] [2021-06-04 21:45:09,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:09,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:09,518 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:09,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:09,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244759592] [2021-06-04 21:45:09,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244759592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:09,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307595600] [2021-06-04 21:45:09,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:09,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:45:09,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:09,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:45:09,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:09,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307595600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:09,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:09,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-04 21:45:09,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244701102] [2021-06-04 21:45:09,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:45:09,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:09,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:45:09,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:45:09,738 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:10,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:10,468 INFO L93 Difference]: Finished difference Result 5496 states and 14697 transitions. [2021-06-04 21:45:10,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:45:10,469 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-04 21:45:10,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:10,474 INFO L225 Difference]: With dead ends: 5496 [2021-06-04 21:45:10,474 INFO L226 Difference]: Without dead ends: 5226 [2021-06-04 21:45:10,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 713.9ms TimeCoverageRelationStatistics Valid=1185, Invalid=3237, Unknown=0, NotChecked=0, Total=4422 [2021-06-04 21:45:10,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-06-04 21:45:10,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 4353. [2021-06-04 21:45:10,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:10,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-04 21:45:10,541 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-04 21:45:10,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:10,541 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-04 21:45:10,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:10,541 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-04 21:45:10,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:10,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:10,544 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:10,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-04 21:45:10,745 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:10,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:10,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1473156400, now seen corresponding path program 221 times [2021-06-04 21:45:10,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:10,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642362892] [2021-06-04 21:45:10,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:10,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:10,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642362892] [2021-06-04 21:45:10,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642362892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:10,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472401714] [2021-06-04 21:45:10,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:11,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-04 21:45:11,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:11,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:45:11,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:11,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472401714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:11,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:11,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-04 21:45:11,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695286421] [2021-06-04 21:45:11,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-04 21:45:11,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:11,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-04 21:45:11,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:45:11,207 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:12,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:12,123 INFO L93 Difference]: Finished difference Result 5446 states and 14597 transitions. [2021-06-04 21:45:12,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-04 21:45:12,124 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-04 21:45:12,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:12,129 INFO L225 Difference]: With dead ends: 5446 [2021-06-04 21:45:12,129 INFO L226 Difference]: Without dead ends: 5176 [2021-06-04 21:45:12,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 900.7ms TimeCoverageRelationStatistics Valid=1219, Invalid=3473, Unknown=0, NotChecked=0, Total=4692 [2021-06-04 21:45:12,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-06-04 21:45:12,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 4353. [2021-06-04 21:45:12,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:12,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-04 21:45:12,171 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-04 21:45:12,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:12,171 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-04 21:45:12,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:12,171 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-04 21:45:12,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:12,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:12,175 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:12,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:12,375 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:12,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:12,376 INFO L82 PathProgramCache]: Analyzing trace with hash 2087395870, now seen corresponding path program 222 times [2021-06-04 21:45:12,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:12,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582581596] [2021-06-04 21:45:12,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:12,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:12,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582581596] [2021-06-04 21:45:12,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582581596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:12,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430602843] [2021-06-04 21:45:12,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:12,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-04 21:45:12,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:12,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:45:12,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:12,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430602843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:12,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:12,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-04 21:45:12,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487800184] [2021-06-04 21:45:12,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:45:12,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:12,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:45:12,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:45:12,824 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:13,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:13,722 INFO L93 Difference]: Finished difference Result 5396 states and 14497 transitions. [2021-06-04 21:45:13,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-04 21:45:13,723 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-04 21:45:13,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:13,727 INFO L225 Difference]: With dead ends: 5396 [2021-06-04 21:45:13,727 INFO L226 Difference]: Without dead ends: 5126 [2021-06-04 21:45:13,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 853.8ms TimeCoverageRelationStatistics Valid=1315, Invalid=3377, Unknown=0, NotChecked=0, Total=4692 [2021-06-04 21:45:13,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2021-06-04 21:45:13,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 4353. [2021-06-04 21:45:13,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:13,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-04 21:45:13,770 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-04 21:45:13,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:13,770 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-04 21:45:13,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:13,770 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-04 21:45:13,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:13,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:13,773 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:13,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:13,974 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:13,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:13,974 INFO L82 PathProgramCache]: Analyzing trace with hash 372153582, now seen corresponding path program 223 times [2021-06-04 21:45:13,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:13,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626618987] [2021-06-04 21:45:13,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:13,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:14,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:14,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626618987] [2021-06-04 21:45:14,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626618987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:14,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229021407] [2021-06-04 21:45:14,198 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:14,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:45:14,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:14,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229021407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:14,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:14,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-04 21:45:14,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626670415] [2021-06-04 21:45:14,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-04 21:45:14,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:14,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-04 21:45:14,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:45:14,446 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:15,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:15,407 INFO L93 Difference]: Finished difference Result 5406 states and 14547 transitions. [2021-06-04 21:45:15,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:45:15,407 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-04 21:45:15,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:15,412 INFO L225 Difference]: With dead ends: 5406 [2021-06-04 21:45:15,412 INFO L226 Difference]: Without dead ends: 5136 [2021-06-04 21:45:15,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 939.8ms TimeCoverageRelationStatistics Valid=1351, Invalid=3619, Unknown=0, NotChecked=0, Total=4970 [2021-06-04 21:45:15,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5136 states. [2021-06-04 21:45:15,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5136 to 4353. [2021-06-04 21:45:15,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.823529411764706) internal successors, (12288), 4352 states have internal predecessors, (12288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:15,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12288 transitions. [2021-06-04 21:45:15,477 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12288 transitions. Word has length 135 [2021-06-04 21:45:15,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:15,477 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12288 transitions. [2021-06-04 21:45:15,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:15,477 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12288 transitions. [2021-06-04 21:45:15,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:15,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:15,481 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:15,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:15,681 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:15,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:15,682 INFO L82 PathProgramCache]: Analyzing trace with hash -660494020, now seen corresponding path program 224 times [2021-06-04 21:45:15,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:15,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393280459] [2021-06-04 21:45:15,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:15,889 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:15,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:15,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393280459] [2021-06-04 21:45:15,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393280459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:15,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252648042] [2021-06-04 21:45:15,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:15,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:45:15,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:15,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:45:15,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:16,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252648042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:16,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:16,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-04 21:45:16,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616611611] [2021-06-04 21:45:16,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:45:16,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:16,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:45:16,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:45:16,106 INFO L87 Difference]: Start difference. First operand 4353 states and 12288 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:16,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:16,916 INFO L93 Difference]: Finished difference Result 6148 states and 16671 transitions. [2021-06-04 21:45:16,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-04 21:45:16,916 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-04 21:45:16,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:16,922 INFO L225 Difference]: With dead ends: 6148 [2021-06-04 21:45:16,922 INFO L226 Difference]: Without dead ends: 5878 [2021-06-04 21:45:16,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 782.0ms TimeCoverageRelationStatistics Valid=1462, Invalid=3508, Unknown=0, NotChecked=0, Total=4970 [2021-06-04 21:45:16,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5878 states. [2021-06-04 21:45:16,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5878 to 4533. [2021-06-04 21:45:16,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4533 states, 4532 states have (on average 2.834730803177405) internal successors, (12847), 4532 states have internal predecessors, (12847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:16,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4533 states to 4533 states and 12847 transitions. [2021-06-04 21:45:16,966 INFO L78 Accepts]: Start accepts. Automaton has 4533 states and 12847 transitions. Word has length 135 [2021-06-04 21:45:16,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:16,966 INFO L482 AbstractCegarLoop]: Abstraction has 4533 states and 12847 transitions. [2021-06-04 21:45:16,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:16,966 INFO L276 IsEmpty]: Start isEmpty. Operand 4533 states and 12847 transitions. [2021-06-04 21:45:16,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:16,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:16,969 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:17,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:17,170 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:17,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:17,170 INFO L82 PathProgramCache]: Analyzing trace with hash -638150770, now seen corresponding path program 225 times [2021-06-04 21:45:17,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:17,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591404329] [2021-06-04 21:45:17,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:17,374 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:17,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:17,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591404329] [2021-06-04 21:45:17,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591404329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:17,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877442024] [2021-06-04 21:45:17,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:17,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-04 21:45:17,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:17,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:45:17,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:17,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877442024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:17,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:17,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-04 21:45:17,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141017192] [2021-06-04 21:45:17,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:17,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:17,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:17,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:17,622 INFO L87 Difference]: Start difference. First operand 4533 states and 12847 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:18,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:18,697 INFO L93 Difference]: Finished difference Result 6016 states and 16336 transitions. [2021-06-04 21:45:18,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-04 21:45:18,698 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-04 21:45:18,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:18,704 INFO L225 Difference]: With dead ends: 6016 [2021-06-04 21:45:18,704 INFO L226 Difference]: Without dead ends: 5441 [2021-06-04 21:45:18,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 1041.8ms TimeCoverageRelationStatistics Valid=1574, Invalid=4278, Unknown=0, NotChecked=0, Total=5852 [2021-06-04 21:45:18,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5441 states. [2021-06-04 21:45:18,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5441 to 2924. [2021-06-04 21:45:18,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2924 states, 2923 states have (on average 2.738966814916182) internal successors, (8006), 2923 states have internal predecessors, (8006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:18,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2924 states to 2924 states and 8006 transitions. [2021-06-04 21:45:18,749 INFO L78 Accepts]: Start accepts. Automaton has 2924 states and 8006 transitions. Word has length 135 [2021-06-04 21:45:18,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:18,749 INFO L482 AbstractCegarLoop]: Abstraction has 2924 states and 8006 transitions. [2021-06-04 21:45:18,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:18,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2924 states and 8006 transitions. [2021-06-04 21:45:18,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:18,751 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:18,751 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:18,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-04 21:45:18,952 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:18,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:18,952 INFO L82 PathProgramCache]: Analyzing trace with hash 2057178814, now seen corresponding path program 226 times [2021-06-04 21:45:18,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:18,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809217238] [2021-06-04 21:45:18,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:18,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:19,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:19,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809217238] [2021-06-04 21:45:19,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809217238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:19,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109546164] [2021-06-04 21:45:19,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:19,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:45:19,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:19,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:45:19,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:19,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109546164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:19,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:19,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 31 [2021-06-04 21:45:19,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866578413] [2021-06-04 21:45:19,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:45:19,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:19,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:45:19,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=722, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:45:19,501 INFO L87 Difference]: Start difference. First operand 2924 states and 8006 transitions. Second operand has 31 states, 31 states have (on average 5.483870967741935) internal successors, (170), 31 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:20,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:20,048 INFO L93 Difference]: Finished difference Result 4114 states and 10706 transitions. [2021-06-04 21:45:20,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:45:20,048 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.483870967741935) internal successors, (170), 31 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-04 21:45:20,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:20,052 INFO L225 Difference]: With dead ends: 4114 [2021-06-04 21:45:20,052 INFO L226 Difference]: Without dead ends: 3780 [2021-06-04 21:45:20,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 663.0ms TimeCoverageRelationStatistics Valid=926, Invalid=2496, Unknown=0, NotChecked=0, Total=3422 [2021-06-04 21:45:20,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3780 states. [2021-06-04 21:45:20,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3780 to 3009. [2021-06-04 21:45:20,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3009 states, 3008 states have (on average 2.7180851063829787) internal successors, (8176), 3008 states have internal predecessors, (8176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:20,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 8176 transitions. [2021-06-04 21:45:20,078 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 8176 transitions. Word has length 140 [2021-06-04 21:45:20,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:20,078 INFO L482 AbstractCegarLoop]: Abstraction has 3009 states and 8176 transitions. [2021-06-04 21:45:20,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.483870967741935) internal successors, (170), 31 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:20,078 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 8176 transitions. [2021-06-04 21:45:20,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:20,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:20,081 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:20,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-04 21:45:20,285 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:20,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:20,285 INFO L82 PathProgramCache]: Analyzing trace with hash -416801150, now seen corresponding path program 227 times [2021-06-04 21:45:20,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:20,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181524147] [2021-06-04 21:45:20,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:20,581 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:20,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:20,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181524147] [2021-06-04 21:45:20,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181524147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:20,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573548753] [2021-06-04 21:45:20,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:20,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-04 21:45:20,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:20,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:20,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:20,867 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:20,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573548753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:20,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:20,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-04 21:45:20,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858651986] [2021-06-04 21:45:20,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:20,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:20,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:20,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:20,869 INFO L87 Difference]: Start difference. First operand 3009 states and 8176 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:21,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:21,333 INFO L93 Difference]: Finished difference Result 5136 states and 12687 transitions. [2021-06-04 21:45:21,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:45:21,333 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-04 21:45:21,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:21,338 INFO L225 Difference]: With dead ends: 5136 [2021-06-04 21:45:21,338 INFO L226 Difference]: Without dead ends: 4866 [2021-06-04 21:45:21,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 590.3ms TimeCoverageRelationStatistics Valid=767, Invalid=1989, Unknown=0, NotChecked=0, Total=2756 [2021-06-04 21:45:21,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4866 states. [2021-06-04 21:45:21,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4866 to 3153. [2021-06-04 21:45:21,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3153 states, 3152 states have (on average 2.7262055837563453) internal successors, (8593), 3152 states have internal predecessors, (8593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:21,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 8593 transitions. [2021-06-04 21:45:21,368 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 8593 transitions. Word has length 140 [2021-06-04 21:45:21,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:21,368 INFO L482 AbstractCegarLoop]: Abstraction has 3153 states and 8593 transitions. [2021-06-04 21:45:21,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:21,368 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 8593 transitions. [2021-06-04 21:45:21,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:21,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:21,371 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:21,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-04 21:45:21,571 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:21,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:21,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1293535918, now seen corresponding path program 228 times [2021-06-04 21:45:21,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:21,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353650988] [2021-06-04 21:45:21,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:21,856 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:21,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:21,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353650988] [2021-06-04 21:45:21,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353650988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:21,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361756864] [2021-06-04 21:45:21,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:21,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-04 21:45:21,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:21,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:21,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:22,143 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:22,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361756864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:22,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:22,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-04 21:45:22,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999696498] [2021-06-04 21:45:22,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:45:22,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:22,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:45:22,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:45:22,144 INFO L87 Difference]: Start difference. First operand 3153 states and 8593 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:22,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:22,707 INFO L93 Difference]: Finished difference Result 5096 states and 12682 transitions. [2021-06-04 21:45:22,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:45:22,707 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-04 21:45:22,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:22,711 INFO L225 Difference]: With dead ends: 5096 [2021-06-04 21:45:22,711 INFO L226 Difference]: Without dead ends: 4826 [2021-06-04 21:45:22,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 670.2ms TimeCoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2021-06-04 21:45:22,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2021-06-04 21:45:22,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 3228. [2021-06-04 21:45:22,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3228 states, 3227 states have (on average 2.732568949488689) internal successors, (8818), 3227 states have internal predecessors, (8818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:22,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3228 states to 3228 states and 8818 transitions. [2021-06-04 21:45:22,742 INFO L78 Accepts]: Start accepts. Automaton has 3228 states and 8818 transitions. Word has length 140 [2021-06-04 21:45:22,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:22,743 INFO L482 AbstractCegarLoop]: Abstraction has 3228 states and 8818 transitions. [2021-06-04 21:45:22,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:22,743 INFO L276 IsEmpty]: Start isEmpty. Operand 3228 states and 8818 transitions. [2021-06-04 21:45:22,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:22,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:22,745 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:22,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:22,945 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:22,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:22,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1264105024, now seen corresponding path program 229 times [2021-06-04 21:45:22,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:22,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960348612] [2021-06-04 21:45:22,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:22,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:23,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:23,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960348612] [2021-06-04 21:45:23,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960348612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:23,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186897106] [2021-06-04 21:45:23,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:23,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:23,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:23,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186897106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:23,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:23,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-04 21:45:23,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530237442] [2021-06-04 21:45:23,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:23,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:23,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:23,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:23,494 INFO L87 Difference]: Start difference. First operand 3228 states and 8818 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:23,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:23,995 INFO L93 Difference]: Finished difference Result 5146 states and 12857 transitions. [2021-06-04 21:45:23,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:45:23,996 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-04 21:45:23,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:24,000 INFO L225 Difference]: With dead ends: 5146 [2021-06-04 21:45:24,000 INFO L226 Difference]: Without dead ends: 4876 [2021-06-04 21:45:24,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 610.9ms TimeCoverageRelationStatistics Valid=769, Invalid=2201, Unknown=0, NotChecked=0, Total=2970 [2021-06-04 21:45:24,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4876 states. [2021-06-04 21:45:24,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4876 to 3303. [2021-06-04 21:45:24,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.7386432465172623) internal successors, (9043), 3302 states have internal predecessors, (9043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:24,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9043 transitions. [2021-06-04 21:45:24,035 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9043 transitions. Word has length 140 [2021-06-04 21:45:24,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:24,035 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9043 transitions. [2021-06-04 21:45:24,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:24,035 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9043 transitions. [2021-06-04 21:45:24,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:24,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:24,037 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:24,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-06-04 21:45:24,238 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:24,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:24,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1666313968, now seen corresponding path program 230 times [2021-06-04 21:45:24,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:24,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607934240] [2021-06-04 21:45:24,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:24,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:24,511 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:24,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:24,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607934240] [2021-06-04 21:45:24,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607934240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:24,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807215152] [2021-06-04 21:45:24,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:24,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:45:24,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:24,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:24,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:24,797 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:24,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807215152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:24,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:24,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-04 21:45:24,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115759467] [2021-06-04 21:45:24,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:45:24,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:24,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:45:24,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:45:24,798 INFO L87 Difference]: Start difference. First operand 3303 states and 9043 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:25,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:25,391 INFO L93 Difference]: Finished difference Result 5171 states and 12982 transitions. [2021-06-04 21:45:25,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:45:25,391 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-04 21:45:25,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:25,395 INFO L225 Difference]: With dead ends: 5171 [2021-06-04 21:45:25,395 INFO L226 Difference]: Without dead ends: 4901 [2021-06-04 21:45:25,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 712.4ms TimeCoverageRelationStatistics Valid=850, Invalid=2572, Unknown=0, NotChecked=0, Total=3422 [2021-06-04 21:45:25,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4901 states. [2021-06-04 21:45:25,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4901 to 3378. [2021-06-04 21:45:25,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3378 states, 3377 states have (on average 2.744447734675748) internal successors, (9268), 3377 states have internal predecessors, (9268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:25,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 9268 transitions. [2021-06-04 21:45:25,429 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 9268 transitions. Word has length 140 [2021-06-04 21:45:25,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:25,430 INFO L482 AbstractCegarLoop]: Abstraction has 3378 states and 9268 transitions. [2021-06-04 21:45:25,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:25,430 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 9268 transitions. [2021-06-04 21:45:25,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:25,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:25,432 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:25,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:25,633 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:25,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:25,633 INFO L82 PathProgramCache]: Analyzing trace with hash 351421310, now seen corresponding path program 231 times [2021-06-04 21:45:25,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:25,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303151196] [2021-06-04 21:45:25,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:25,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:25,920 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:25,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:25,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303151196] [2021-06-04 21:45:25,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303151196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:25,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557645711] [2021-06-04 21:45:25,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:26,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-04 21:45:26,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:26,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:26,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:26,228 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:26,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557645711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:26,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:26,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-04 21:45:26,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695073541] [2021-06-04 21:45:26,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:26,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:26,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:26,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:26,229 INFO L87 Difference]: Start difference. First operand 3378 states and 9268 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:26,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:26,781 INFO L93 Difference]: Finished difference Result 5196 states and 13107 transitions. [2021-06-04 21:45:26,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:45:26,782 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-04 21:45:26,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:26,786 INFO L225 Difference]: With dead ends: 5196 [2021-06-04 21:45:26,786 INFO L226 Difference]: Without dead ends: 4926 [2021-06-04 21:45:26,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 665.9ms TimeCoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2021-06-04 21:45:26,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4926 states. [2021-06-04 21:45:26,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4926 to 3453. [2021-06-04 21:45:26,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3453 states, 3452 states have (on average 2.75) internal successors, (9493), 3452 states have internal predecessors, (9493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:26,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 9493 transitions. [2021-06-04 21:45:26,822 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 9493 transitions. Word has length 140 [2021-06-04 21:45:26,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:26,822 INFO L482 AbstractCegarLoop]: Abstraction has 3453 states and 9493 transitions. [2021-06-04 21:45:26,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:26,822 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 9493 transitions. [2021-06-04 21:45:26,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:26,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:26,825 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:27,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-04 21:45:27,026 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:27,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:27,026 INFO L82 PathProgramCache]: Analyzing trace with hash -547102130, now seen corresponding path program 232 times [2021-06-04 21:45:27,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:27,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620462232] [2021-06-04 21:45:27,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:27,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:27,299 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:27,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:27,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620462232] [2021-06-04 21:45:27,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620462232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:27,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485552797] [2021-06-04 21:45:27,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:27,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:45:27,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:27,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:27,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:27,592 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:27,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485552797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:27,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:27,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-04 21:45:27,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613731221] [2021-06-04 21:45:27,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:45:27,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:27,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:45:27,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:45:27,593 INFO L87 Difference]: Start difference. First operand 3453 states and 9493 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:28,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:28,244 INFO L93 Difference]: Finished difference Result 5221 states and 13232 transitions. [2021-06-04 21:45:28,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:45:28,244 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-04 21:45:28,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:28,249 INFO L225 Difference]: With dead ends: 5221 [2021-06-04 21:45:28,249 INFO L226 Difference]: Without dead ends: 4951 [2021-06-04 21:45:28,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 748.5ms TimeCoverageRelationStatistics Valid=876, Invalid=2784, Unknown=0, NotChecked=0, Total=3660 [2021-06-04 21:45:28,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4951 states. [2021-06-04 21:45:28,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4951 to 3528. [2021-06-04 21:45:28,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.755316132690672) internal successors, (9718), 3527 states have internal predecessors, (9718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:28,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9718 transitions. [2021-06-04 21:45:28,284 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9718 transitions. Word has length 140 [2021-06-04 21:45:28,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:28,284 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9718 transitions. [2021-06-04 21:45:28,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:28,285 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9718 transitions. [2021-06-04 21:45:28,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:28,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:28,287 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:28,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:28,488 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:28,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:28,488 INFO L82 PathProgramCache]: Analyzing trace with hash 2132911676, now seen corresponding path program 233 times [2021-06-04 21:45:28,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:28,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680829964] [2021-06-04 21:45:28,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:28,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:28,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680829964] [2021-06-04 21:45:28,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680829964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:28,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18500788] [2021-06-04 21:45:28,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:28,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-04 21:45:28,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:28,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:28,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:28,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18500788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:28,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:28,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-04 21:45:28,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506383903] [2021-06-04 21:45:28,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:28,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:28,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:28,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:28,993 INFO L87 Difference]: Start difference. First operand 3528 states and 9718 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:29,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:29,567 INFO L93 Difference]: Finished difference Result 5246 states and 13357 transitions. [2021-06-04 21:45:29,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:45:29,567 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-04 21:45:29,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:29,572 INFO L225 Difference]: With dead ends: 5246 [2021-06-04 21:45:29,572 INFO L226 Difference]: Without dead ends: 4976 [2021-06-04 21:45:29,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 638.7ms TimeCoverageRelationStatistics Valid=821, Invalid=2601, Unknown=0, NotChecked=0, Total=3422 [2021-06-04 21:45:29,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2021-06-04 21:45:29,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 3603. [2021-06-04 21:45:29,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3603 states, 3602 states have (on average 2.7604108828428653) internal successors, (9943), 3602 states have internal predecessors, (9943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:29,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3603 states to 3603 states and 9943 transitions. [2021-06-04 21:45:29,608 INFO L78 Accepts]: Start accepts. Automaton has 3603 states and 9943 transitions. Word has length 140 [2021-06-04 21:45:29,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:29,608 INFO L482 AbstractCegarLoop]: Abstraction has 3603 states and 9943 transitions. [2021-06-04 21:45:29,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:29,608 INFO L276 IsEmpty]: Start isEmpty. Operand 3603 states and 9943 transitions. [2021-06-04 21:45:29,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:29,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:29,611 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:29,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:29,812 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:29,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:29,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1752467724, now seen corresponding path program 234 times [2021-06-04 21:45:29,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:29,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748341632] [2021-06-04 21:45:29,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:29,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:30,089 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:30,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:30,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748341632] [2021-06-04 21:45:30,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748341632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:30,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358893292] [2021-06-04 21:45:30,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:30,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-04 21:45:30,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:30,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:30,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:30,365 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:30,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358893292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:30,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:30,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-04 21:45:30,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787292953] [2021-06-04 21:45:30,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:45:30,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:30,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:45:30,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:45:30,366 INFO L87 Difference]: Start difference. First operand 3603 states and 9943 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:31,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:31,118 INFO L93 Difference]: Finished difference Result 5271 states and 13482 transitions. [2021-06-04 21:45:31,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:45:31,119 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-04 21:45:31,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:31,123 INFO L225 Difference]: With dead ends: 5271 [2021-06-04 21:45:31,123 INFO L226 Difference]: Without dead ends: 5001 [2021-06-04 21:45:31,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 777.5ms TimeCoverageRelationStatistics Valid=918, Invalid=2988, Unknown=0, NotChecked=0, Total=3906 [2021-06-04 21:45:31,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5001 states. [2021-06-04 21:45:31,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5001 to 3678. [2021-06-04 21:45:31,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3678 states, 3677 states have (on average 2.7652977971172152) internal successors, (10168), 3677 states have internal predecessors, (10168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:31,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3678 states to 3678 states and 10168 transitions. [2021-06-04 21:45:31,164 INFO L78 Accepts]: Start accepts. Automaton has 3678 states and 10168 transitions. Word has length 140 [2021-06-04 21:45:31,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:31,164 INFO L482 AbstractCegarLoop]: Abstraction has 3678 states and 10168 transitions. [2021-06-04 21:45:31,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:31,164 INFO L276 IsEmpty]: Start isEmpty. Operand 3678 states and 10168 transitions. [2021-06-04 21:45:31,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:31,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:31,167 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:31,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:31,368 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:31,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:31,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1918124422, now seen corresponding path program 235 times [2021-06-04 21:45:31,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:31,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254850956] [2021-06-04 21:45:31,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:31,616 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:31,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:31,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254850956] [2021-06-04 21:45:31,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254850956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:31,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124082116] [2021-06-04 21:45:31,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:31,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:31,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:31,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:31,860 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:31,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124082116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:31,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:31,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-04 21:45:31,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409652780] [2021-06-04 21:45:31,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:31,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:31,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:31,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:31,861 INFO L87 Difference]: Start difference. First operand 3678 states and 10168 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:32,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:32,484 INFO L93 Difference]: Finished difference Result 5296 states and 13607 transitions. [2021-06-04 21:45:32,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:45:32,485 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-04 21:45:32,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:32,489 INFO L225 Difference]: With dead ends: 5296 [2021-06-04 21:45:32,489 INFO L226 Difference]: Without dead ends: 5026 [2021-06-04 21:45:32,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 687.4ms TimeCoverageRelationStatistics Valid=871, Invalid=2789, Unknown=0, NotChecked=0, Total=3660 [2021-06-04 21:45:32,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5026 states. [2021-06-04 21:45:32,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5026 to 3753. [2021-06-04 21:45:32,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3753 states, 3752 states have (on average 2.76998933901919) internal successors, (10393), 3752 states have internal predecessors, (10393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:32,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 10393 transitions. [2021-06-04 21:45:32,526 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 10393 transitions. Word has length 140 [2021-06-04 21:45:32,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:32,526 INFO L482 AbstractCegarLoop]: Abstraction has 3753 states and 10393 transitions. [2021-06-04 21:45:32,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:32,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 10393 transitions. [2021-06-04 21:45:32,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:32,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:32,529 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:32,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-04 21:45:32,730 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:32,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:32,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1109072566, now seen corresponding path program 236 times [2021-06-04 21:45:32,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:32,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30135278] [2021-06-04 21:45:32,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:32,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:32,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:32,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30135278] [2021-06-04 21:45:32,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30135278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:32,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312701226] [2021-06-04 21:45:32,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:33,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:45:33,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:33,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:33,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:33,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312701226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:33,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:33,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-04 21:45:33,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877374360] [2021-06-04 21:45:33,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:45:33,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:33,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:45:33,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:45:33,239 INFO L87 Difference]: Start difference. First operand 3753 states and 10393 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:34,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:34,024 INFO L93 Difference]: Finished difference Result 5321 states and 13732 transitions. [2021-06-04 21:45:34,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:45:34,025 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-04 21:45:34,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:34,030 INFO L225 Difference]: With dead ends: 5321 [2021-06-04 21:45:34,030 INFO L226 Difference]: Without dead ends: 5051 [2021-06-04 21:45:34,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 823.9ms TimeCoverageRelationStatistics Valid=976, Invalid=3184, Unknown=0, NotChecked=0, Total=4160 [2021-06-04 21:45:34,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-06-04 21:45:34,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 3828. [2021-06-04 21:45:34,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 2.7744969950352756) internal successors, (10618), 3827 states have internal predecessors, (10618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:34,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 10618 transitions. [2021-06-04 21:45:34,074 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 10618 transitions. Word has length 140 [2021-06-04 21:45:34,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:34,074 INFO L482 AbstractCegarLoop]: Abstraction has 3828 states and 10618 transitions. [2021-06-04 21:45:34,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:34,075 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 10618 transitions. [2021-06-04 21:45:34,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:34,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:34,078 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:34,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-04 21:45:34,278 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:34,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:34,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1793944632, now seen corresponding path program 237 times [2021-06-04 21:45:34,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:34,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201992768] [2021-06-04 21:45:34,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:34,538 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:34,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:34,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201992768] [2021-06-04 21:45:34,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201992768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:34,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235630154] [2021-06-04 21:45:34,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:34,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-04 21:45:34,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:34,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:34,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:34,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235630154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:34,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:34,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-04 21:45:34,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256205031] [2021-06-04 21:45:34,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:34,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:34,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:34,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:34,837 INFO L87 Difference]: Start difference. First operand 3828 states and 10618 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:35,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:35,547 INFO L93 Difference]: Finished difference Result 5346 states and 13857 transitions. [2021-06-04 21:45:35,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:45:35,548 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-04 21:45:35,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:35,553 INFO L225 Difference]: With dead ends: 5346 [2021-06-04 21:45:35,553 INFO L226 Difference]: Without dead ends: 5076 [2021-06-04 21:45:35,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 724.5ms TimeCoverageRelationStatistics Valid=937, Invalid=2969, Unknown=0, NotChecked=0, Total=3906 [2021-06-04 21:45:35,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5076 states. [2021-06-04 21:45:35,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5076 to 3903. [2021-06-04 21:45:35,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 2.7788313685289596) internal successors, (10843), 3902 states have internal predecessors, (10843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:35,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 10843 transitions. [2021-06-04 21:45:35,600 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 10843 transitions. Word has length 140 [2021-06-04 21:45:35,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:35,600 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 10843 transitions. [2021-06-04 21:45:35,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:35,600 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 10843 transitions. [2021-06-04 21:45:35,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:35,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:35,603 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:35,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-04 21:45:35,804 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:35,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:35,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1548867336, now seen corresponding path program 238 times [2021-06-04 21:45:35,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:35,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79967080] [2021-06-04 21:45:35,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:36,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:36,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79967080] [2021-06-04 21:45:36,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79967080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:36,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393876683] [2021-06-04 21:45:36,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:36,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:45:36,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:36,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:36,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:36,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393876683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:36,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:36,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-04 21:45:36,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596255803] [2021-06-04 21:45:36,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:45:36,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:36,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:45:36,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:45:36,314 INFO L87 Difference]: Start difference. First operand 3903 states and 10843 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:37,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:37,179 INFO L93 Difference]: Finished difference Result 5371 states and 13982 transitions. [2021-06-04 21:45:37,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:45:37,179 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-04 21:45:37,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:37,184 INFO L225 Difference]: With dead ends: 5371 [2021-06-04 21:45:37,184 INFO L226 Difference]: Without dead ends: 5101 [2021-06-04 21:45:37,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 876.0ms TimeCoverageRelationStatistics Valid=1050, Invalid=3372, Unknown=0, NotChecked=0, Total=4422 [2021-06-04 21:45:37,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5101 states. [2021-06-04 21:45:37,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5101 to 3978. [2021-06-04 21:45:37,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 3977 states have (on average 2.783002263012321) internal successors, (11068), 3977 states have internal predecessors, (11068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:37,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 11068 transitions. [2021-06-04 21:45:37,226 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 11068 transitions. Word has length 140 [2021-06-04 21:45:37,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:37,226 INFO L482 AbstractCegarLoop]: Abstraction has 3978 states and 11068 transitions. [2021-06-04 21:45:37,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:37,226 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 11068 transitions. [2021-06-04 21:45:37,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:37,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:37,229 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:37,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-04 21:45:37,430 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:37,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:37,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1172017014, now seen corresponding path program 239 times [2021-06-04 21:45:37,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:37,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755036729] [2021-06-04 21:45:37,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:37,654 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:37,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:37,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755036729] [2021-06-04 21:45:37,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755036729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:37,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619818584] [2021-06-04 21:45:37,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:37,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-04 21:45:37,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:37,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:37,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:37,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619818584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:37,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:37,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-04 21:45:37,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236772850] [2021-06-04 21:45:37,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:37,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:37,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:37,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:37,910 INFO L87 Difference]: Start difference. First operand 3978 states and 11068 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:38,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:38,639 INFO L93 Difference]: Finished difference Result 5396 states and 14107 transitions. [2021-06-04 21:45:38,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:45:38,639 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-04 21:45:38,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:38,644 INFO L225 Difference]: With dead ends: 5396 [2021-06-04 21:45:38,644 INFO L226 Difference]: Without dead ends: 5126 [2021-06-04 21:45:38,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 729.0ms TimeCoverageRelationStatistics Valid=1019, Invalid=3141, Unknown=0, NotChecked=0, Total=4160 [2021-06-04 21:45:38,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2021-06-04 21:45:38,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 4053. [2021-06-04 21:45:38,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4053 states, 4052 states have (on average 2.7870187561697928) internal successors, (11293), 4052 states have internal predecessors, (11293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:38,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4053 states to 4053 states and 11293 transitions. [2021-06-04 21:45:38,686 INFO L78 Accepts]: Start accepts. Automaton has 4053 states and 11293 transitions. Word has length 140 [2021-06-04 21:45:38,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:38,687 INFO L482 AbstractCegarLoop]: Abstraction has 4053 states and 11293 transitions. [2021-06-04 21:45:38,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:38,687 INFO L276 IsEmpty]: Start isEmpty. Operand 4053 states and 11293 transitions. [2021-06-04 21:45:38,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:38,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:38,690 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:38,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-06-04 21:45:38,890 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:38,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:38,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1796194746, now seen corresponding path program 240 times [2021-06-04 21:45:38,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:38,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275881292] [2021-06-04 21:45:38,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:39,120 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:39,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:39,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275881292] [2021-06-04 21:45:39,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275881292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:39,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595626163] [2021-06-04 21:45:39,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:39,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-04 21:45:39,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:39,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:39,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:39,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595626163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:39,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:39,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-04 21:45:39,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646452518] [2021-06-04 21:45:39,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:45:39,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:39,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:45:39,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:45:39,416 INFO L87 Difference]: Start difference. First operand 4053 states and 11293 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:40,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:40,310 INFO L93 Difference]: Finished difference Result 5421 states and 14232 transitions. [2021-06-04 21:45:40,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:45:40,310 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-04 21:45:40,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:40,315 INFO L225 Difference]: With dead ends: 5421 [2021-06-04 21:45:40,315 INFO L226 Difference]: Without dead ends: 5151 [2021-06-04 21:45:40,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 903.2ms TimeCoverageRelationStatistics Valid=1140, Invalid=3552, Unknown=0, NotChecked=0, Total=4692 [2021-06-04 21:45:40,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2021-06-04 21:45:40,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 4128. [2021-06-04 21:45:40,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4128 states, 4127 states have (on average 2.790889265810516) internal successors, (11518), 4127 states have internal predecessors, (11518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:40,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4128 states to 4128 states and 11518 transitions. [2021-06-04 21:45:40,357 INFO L78 Accepts]: Start accepts. Automaton has 4128 states and 11518 transitions. Word has length 140 [2021-06-04 21:45:40,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:40,357 INFO L482 AbstractCegarLoop]: Abstraction has 4128 states and 11518 transitions. [2021-06-04 21:45:40,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:40,357 INFO L276 IsEmpty]: Start isEmpty. Operand 4128 states and 11518 transitions. [2021-06-04 21:45:40,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:40,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:40,360 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:40,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:40,561 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:40,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:40,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1341978572, now seen corresponding path program 241 times [2021-06-04 21:45:40,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:40,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767638755] [2021-06-04 21:45:40,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:40,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:40,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:40,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767638755] [2021-06-04 21:45:40,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767638755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:40,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300290133] [2021-06-04 21:45:40,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:40,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:40,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:41,018 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:41,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300290133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:41,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:41,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-04 21:45:41,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399101484] [2021-06-04 21:45:41,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:41,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:41,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:41,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:41,019 INFO L87 Difference]: Start difference. First operand 4128 states and 11518 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:41,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:41,850 INFO L93 Difference]: Finished difference Result 5446 states and 14357 transitions. [2021-06-04 21:45:41,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:45:41,851 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-04 21:45:41,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:41,855 INFO L225 Difference]: With dead ends: 5446 [2021-06-04 21:45:41,855 INFO L226 Difference]: Without dead ends: 5176 [2021-06-04 21:45:41,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 779.9ms TimeCoverageRelationStatistics Valid=1117, Invalid=3305, Unknown=0, NotChecked=0, Total=4422 [2021-06-04 21:45:41,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-06-04 21:45:41,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 4203. [2021-06-04 21:45:41,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4203 states, 4202 states have (on average 2.7946216087577342) internal successors, (11743), 4202 states have internal predecessors, (11743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:41,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4203 states to 4203 states and 11743 transitions. [2021-06-04 21:45:41,897 INFO L78 Accepts]: Start accepts. Automaton has 4203 states and 11743 transitions. Word has length 140 [2021-06-04 21:45:41,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:41,897 INFO L482 AbstractCegarLoop]: Abstraction has 4203 states and 11743 transitions. [2021-06-04 21:45:41,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:41,898 INFO L276 IsEmpty]: Start isEmpty. Operand 4203 states and 11743 transitions. [2021-06-04 21:45:41,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:41,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:41,901 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:42,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-04 21:45:42,105 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:42,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:42,105 INFO L82 PathProgramCache]: Analyzing trace with hash -343082236, now seen corresponding path program 242 times [2021-06-04 21:45:42,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:42,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773360296] [2021-06-04 21:45:42,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:42,340 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:42,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:42,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773360296] [2021-06-04 21:45:42,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773360296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:42,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44798995] [2021-06-04 21:45:42,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:42,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:45:42,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:42,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:42,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:42,599 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:42,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44798995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:42,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:42,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-04 21:45:42,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434437666] [2021-06-04 21:45:42,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:45:42,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:42,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:45:42,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:45:42,600 INFO L87 Difference]: Start difference. First operand 4203 states and 11743 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:43,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:43,593 INFO L93 Difference]: Finished difference Result 5471 states and 14482 transitions. [2021-06-04 21:45:43,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-04 21:45:43,593 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-04 21:45:43,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:43,599 INFO L225 Difference]: With dead ends: 5471 [2021-06-04 21:45:43,599 INFO L226 Difference]: Without dead ends: 5201 [2021-06-04 21:45:43,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 957.6ms TimeCoverageRelationStatistics Valid=1246, Invalid=3724, Unknown=0, NotChecked=0, Total=4970 [2021-06-04 21:45:43,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5201 states. [2021-06-04 21:45:43,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5201 to 4278. [2021-06-04 21:45:43,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4278 states, 4277 states have (on average 2.7982230535422024) internal successors, (11968), 4277 states have internal predecessors, (11968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:43,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4278 states to 4278 states and 11968 transitions. [2021-06-04 21:45:43,650 INFO L78 Accepts]: Start accepts. Automaton has 4278 states and 11968 transitions. Word has length 140 [2021-06-04 21:45:43,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:43,650 INFO L482 AbstractCegarLoop]: Abstraction has 4278 states and 11968 transitions. [2021-06-04 21:45:43,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:43,650 INFO L276 IsEmpty]: Start isEmpty. Operand 4278 states and 11968 transitions. [2021-06-04 21:45:43,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:43,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:43,653 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:43,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:43,854 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:43,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:43,854 INFO L82 PathProgramCache]: Analyzing trace with hash 2072557170, now seen corresponding path program 243 times [2021-06-04 21:45:43,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:43,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900910946] [2021-06-04 21:45:43,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:44,105 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:44,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:44,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900910946] [2021-06-04 21:45:44,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900910946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:44,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738895742] [2021-06-04 21:45:44,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:44,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-04 21:45:44,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:44,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:44,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:44,362 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:44,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738895742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:44,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:44,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-04 21:45:44,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748239622] [2021-06-04 21:45:44,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:44,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:44,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:44,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:44,363 INFO L87 Difference]: Start difference. First operand 4278 states and 11968 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:45,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:45,164 INFO L93 Difference]: Finished difference Result 5496 states and 14607 transitions. [2021-06-04 21:45:45,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:45:45,165 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-04 21:45:45,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:45,170 INFO L225 Difference]: With dead ends: 5496 [2021-06-04 21:45:45,170 INFO L226 Difference]: Without dead ends: 5226 [2021-06-04 21:45:45,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 812.5ms TimeCoverageRelationStatistics Valid=1231, Invalid=3461, Unknown=0, NotChecked=0, Total=4692 [2021-06-04 21:45:45,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-06-04 21:45:45,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 4353. [2021-06-04 21:45:45,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.801700367647059) internal successors, (12193), 4352 states have internal predecessors, (12193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:45,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12193 transitions. [2021-06-04 21:45:45,215 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12193 transitions. Word has length 140 [2021-06-04 21:45:45,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:45,215 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12193 transitions. [2021-06-04 21:45:45,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:45,216 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12193 transitions. [2021-06-04 21:45:45,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:45,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:45,219 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:45,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:45,420 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:45,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:45,420 INFO L82 PathProgramCache]: Analyzing trace with hash -192090814, now seen corresponding path program 244 times [2021-06-04 21:45:45,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:45,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436713765] [2021-06-04 21:45:45,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:45,655 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:45,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:45,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436713765] [2021-06-04 21:45:45,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436713765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:45,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791662507] [2021-06-04 21:45:45,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:45,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:45:45,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:45,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:45,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:45,906 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:45,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791662507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:45,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:45,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-04 21:45:45,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521211711] [2021-06-04 21:45:45,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:45:45,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:45,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:45:45,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:45:45,907 INFO L87 Difference]: Start difference. First operand 4353 states and 12193 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:46,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:46,930 INFO L93 Difference]: Finished difference Result 5521 states and 14732 transitions. [2021-06-04 21:45:46,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:45:46,930 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-04 21:45:46,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:46,935 INFO L225 Difference]: With dead ends: 5521 [2021-06-04 21:45:46,935 INFO L226 Difference]: Without dead ends: 5251 [2021-06-04 21:45:46,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 1005.1ms TimeCoverageRelationStatistics Valid=1368, Invalid=3888, Unknown=0, NotChecked=0, Total=5256 [2021-06-04 21:45:46,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2021-06-04 21:45:46,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 4428. [2021-06-04 21:45:46,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4428 states, 4427 states have (on average 2.805059859950305) internal successors, (12418), 4427 states have internal predecessors, (12418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:46,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4428 states to 4428 states and 12418 transitions. [2021-06-04 21:45:46,980 INFO L78 Accepts]: Start accepts. Automaton has 4428 states and 12418 transitions. Word has length 140 [2021-06-04 21:45:46,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:46,980 INFO L482 AbstractCegarLoop]: Abstraction has 4428 states and 12418 transitions. [2021-06-04 21:45:46,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:46,981 INFO L276 IsEmpty]: Start isEmpty. Operand 4428 states and 12418 transitions. [2021-06-04 21:45:46,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:46,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:46,984 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:47,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:47,184 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:47,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:47,185 INFO L82 PathProgramCache]: Analyzing trace with hash 422148656, now seen corresponding path program 245 times [2021-06-04 21:45:47,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:47,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288613125] [2021-06-04 21:45:47,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:47,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:47,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288613125] [2021-06-04 21:45:47,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288613125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:47,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924473445] [2021-06-04 21:45:47,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:47,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-04 21:45:47,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:47,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:47,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:47,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924473445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:47,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:47,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-04 21:45:47,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906920431] [2021-06-04 21:45:47,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:47,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:47,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:47,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:47,635 INFO L87 Difference]: Start difference. First operand 4428 states and 12418 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:48,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:48,471 INFO L93 Difference]: Finished difference Result 5591 states and 14977 transitions. [2021-06-04 21:45:48,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-04 21:45:48,471 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-04 21:45:48,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:48,477 INFO L225 Difference]: With dead ends: 5591 [2021-06-04 21:45:48,477 INFO L226 Difference]: Without dead ends: 5321 [2021-06-04 21:45:48,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 814.6ms TimeCoverageRelationStatistics Valid=1361, Invalid=3609, Unknown=0, NotChecked=0, Total=4970 [2021-06-04 21:45:48,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5321 states. [2021-06-04 21:45:48,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5321 to 4503. [2021-06-04 21:45:48,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4503 states, 4502 states have (on average 2.8116392714349177) internal successors, (12658), 4502 states have internal predecessors, (12658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:48,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4503 states to 4503 states and 12658 transitions. [2021-06-04 21:45:48,543 INFO L78 Accepts]: Start accepts. Automaton has 4503 states and 12658 transitions. Word has length 140 [2021-06-04 21:45:48,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:48,543 INFO L482 AbstractCegarLoop]: Abstraction has 4503 states and 12658 transitions. [2021-06-04 21:45:48,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:48,544 INFO L276 IsEmpty]: Start isEmpty. Operand 4503 states and 12658 transitions. [2021-06-04 21:45:48,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:48,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:48,547 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:48,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:48,748 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:48,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:48,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1293093632, now seen corresponding path program 246 times [2021-06-04 21:45:48,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:48,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55310418] [2021-06-04 21:45:48,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:48,964 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:48,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:48,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55310418] [2021-06-04 21:45:48,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55310418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:48,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194676539] [2021-06-04 21:45:48,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:49,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-04 21:45:49,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:49,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:49,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:49,226 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:49,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194676539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:49,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:49,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-04 21:45:49,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343845575] [2021-06-04 21:45:49,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:45:49,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:49,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:45:49,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:45:49,227 INFO L87 Difference]: Start difference. First operand 4503 states and 12658 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:50,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:50,353 INFO L93 Difference]: Finished difference Result 6169 states and 16603 transitions. [2021-06-04 21:45:50,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-04 21:45:50,353 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-04 21:45:50,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:50,359 INFO L225 Difference]: With dead ends: 6169 [2021-06-04 21:45:50,359 INFO L226 Difference]: Without dead ends: 5546 [2021-06-04 21:45:50,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1510 ImplicationChecksByTransitivity, 1070.6ms TimeCoverageRelationStatistics Valid=1529, Invalid=4323, Unknown=0, NotChecked=0, Total=5852 [2021-06-04 21:45:50,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5546 states. [2021-06-04 21:45:50,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5546 to 4578. [2021-06-04 21:45:50,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.815818221542495) internal successors, (12888), 4577 states have internal predecessors, (12888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:50,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12888 transitions. [2021-06-04 21:45:50,407 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12888 transitions. Word has length 140 [2021-06-04 21:45:50,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:50,408 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12888 transitions. [2021-06-04 21:45:50,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:50,408 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12888 transitions. [2021-06-04 21:45:50,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:50,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:50,413 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:50,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-06-04 21:45:50,614 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:50,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:50,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1969226062, now seen corresponding path program 247 times [2021-06-04 21:45:50,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:50,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783426096] [2021-06-04 21:45:50,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:50,838 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:50,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:50,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783426096] [2021-06-04 21:45:50,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783426096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:50,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655984402] [2021-06-04 21:45:50,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:50,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:50,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:51,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655984402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:51,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:51,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-04 21:45:51,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307193002] [2021-06-04 21:45:51,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:51,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:51,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:51,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:51,122 INFO L87 Difference]: Start difference. First operand 4578 states and 12888 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:51,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:51,988 INFO L93 Difference]: Finished difference Result 6398 states and 17321 transitions. [2021-06-04 21:45:51,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-04 21:45:51,988 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-04 21:45:51,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:51,995 INFO L225 Difference]: With dead ends: 6398 [2021-06-04 21:45:51,995 INFO L226 Difference]: Without dead ends: 6128 [2021-06-04 21:45:51,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 854.5ms TimeCoverageRelationStatistics Valid=1508, Invalid=3748, Unknown=0, NotChecked=0, Total=5256 [2021-06-04 21:45:52,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6128 states. [2021-06-04 21:45:52,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6128 to 4758. [2021-06-04 21:45:52,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4758 states, 4757 states have (on average 2.8267815850325837) internal successors, (13447), 4757 states have internal predecessors, (13447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:52,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4758 states to 4758 states and 13447 transitions. [2021-06-04 21:45:52,048 INFO L78 Accepts]: Start accepts. Automaton has 4758 states and 13447 transitions. Word has length 140 [2021-06-04 21:45:52,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:52,048 INFO L482 AbstractCegarLoop]: Abstraction has 4758 states and 13447 transitions. [2021-06-04 21:45:52,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:52,048 INFO L276 IsEmpty]: Start isEmpty. Operand 4758 states and 13447 transitions. [2021-06-04 21:45:52,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:52,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:52,052 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:52,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-04 21:45:52,254 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:52,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:52,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1991569312, now seen corresponding path program 248 times [2021-06-04 21:45:52,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:52,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139951757] [2021-06-04 21:45:52,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:52,500 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:52,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:52,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139951757] [2021-06-04 21:45:52,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139951757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:52,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100806285] [2021-06-04 21:45:52,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:52,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:45:52,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:52,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:52,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:52,747 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:52,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100806285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:52,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:52,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-04 21:45:52,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69927483] [2021-06-04 21:45:52,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:45:52,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:52,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:45:52,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:45:52,749 INFO L87 Difference]: Start difference. First operand 4758 states and 13447 transitions. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:53,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:53,897 INFO L93 Difference]: Finished difference Result 6221 states and 16821 transitions. [2021-06-04 21:45:53,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-04 21:45:53,898 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-06-04 21:45:53,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:53,902 INFO L225 Difference]: With dead ends: 6221 [2021-06-04 21:45:53,902 INFO L226 Difference]: Without dead ends: 5646 [2021-06-04 21:45:53,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 1169.4ms TimeCoverageRelationStatistics Valid=1708, Invalid=4612, Unknown=0, NotChecked=0, Total=6320 [2021-06-04 21:45:53,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5646 states. [2021-06-04 21:45:53,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5646 to 3203. [2021-06-04 21:45:53,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3202 states have (on average 2.7382885696439727) internal successors, (8768), 3202 states have internal predecessors, (8768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:53,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8768 transitions. [2021-06-04 21:45:53,938 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8768 transitions. Word has length 140 [2021-06-04 21:45:53,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:53,938 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8768 transitions. [2021-06-04 21:45:53,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:53,938 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8768 transitions. [2021-06-04 21:45:53,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:45:53,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:53,941 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:54,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-04 21:45:54,145 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:54,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:54,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1192364991, now seen corresponding path program 249 times [2021-06-04 21:45:54,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:54,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699623338] [2021-06-04 21:45:54,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:54,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:54,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699623338] [2021-06-04 21:45:54,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699623338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:54,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087657773] [2021-06-04 21:45:54,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:54,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-04 21:45:54,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:54,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:45:54,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:54,740 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:54,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087657773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:54,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:54,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-04 21:45:54,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404556408] [2021-06-04 21:45:54,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:45:54,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:54,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:45:54,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:45:54,741 INFO L87 Difference]: Start difference. First operand 3203 states and 8768 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:55,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:55,277 INFO L93 Difference]: Finished difference Result 4721 states and 12007 transitions. [2021-06-04 21:45:55,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:45:55,277 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-04 21:45:55,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:55,281 INFO L225 Difference]: With dead ends: 4721 [2021-06-04 21:45:55,281 INFO L226 Difference]: Without dead ends: 4451 [2021-06-04 21:45:55,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 669.4ms TimeCoverageRelationStatistics Valid=844, Invalid=2348, Unknown=0, NotChecked=0, Total=3192 [2021-06-04 21:45:55,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-06-04 21:45:55,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 3278. [2021-06-04 21:45:55,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3278 states, 3277 states have (on average 2.744278303326213) internal successors, (8993), 3277 states have internal predecessors, (8993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:55,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 8993 transitions. [2021-06-04 21:45:55,313 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 8993 transitions. Word has length 145 [2021-06-04 21:45:55,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:55,313 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 8993 transitions. [2021-06-04 21:45:55,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:55,313 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 8993 transitions. [2021-06-04 21:45:55,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:45:55,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:55,315 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:55,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-04 21:45:55,516 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:55,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:55,516 INFO L82 PathProgramCache]: Analyzing trace with hash 315630223, now seen corresponding path program 250 times [2021-06-04 21:45:55,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:55,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652163905] [2021-06-04 21:45:55,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:55,825 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:55,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:55,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652163905] [2021-06-04 21:45:55,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652163905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:55,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927480726] [2021-06-04 21:45:55,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:55,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:45:55,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:55,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:45:55,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:56,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927480726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:56,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:56,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-04 21:45:56,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843504623] [2021-06-04 21:45:56,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:45:56,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:56,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:45:56,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:45:56,132 INFO L87 Difference]: Start difference. First operand 3278 states and 8993 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:56,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:56,711 INFO L93 Difference]: Finished difference Result 5291 states and 13222 transitions. [2021-06-04 21:45:56,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:45:56,711 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-04 21:45:56,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:56,716 INFO L225 Difference]: With dead ends: 5291 [2021-06-04 21:45:56,716 INFO L226 Difference]: Without dead ends: 5021 [2021-06-04 21:45:56,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 717.5ms TimeCoverageRelationStatistics Valid=905, Invalid=2635, Unknown=0, NotChecked=0, Total=3540 [2021-06-04 21:45:56,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5021 states. [2021-06-04 21:45:56,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5021 to 3353. [2021-06-04 21:45:56,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 2.75) internal successors, (9218), 3352 states have internal predecessors, (9218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:56,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9218 transitions. [2021-06-04 21:45:56,751 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9218 transitions. Word has length 145 [2021-06-04 21:45:56,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:56,752 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9218 transitions. [2021-06-04 21:45:56,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:56,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9218 transitions. [2021-06-04 21:45:56,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:45:56,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:56,755 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:56,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:56,965 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:56,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:56,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1421696131, now seen corresponding path program 251 times [2021-06-04 21:45:56,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:56,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382584192] [2021-06-04 21:45:56,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:57,249 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:57,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:57,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382584192] [2021-06-04 21:45:57,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382584192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:57,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439169486] [2021-06-04 21:45:57,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:57,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-04 21:45:57,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:57,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:45:57,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:57,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439169486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:57,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:57,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-04 21:45:57,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771880660] [2021-06-04 21:45:57,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:45:57,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:57,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:45:57,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:45:57,512 INFO L87 Difference]: Start difference. First operand 3353 states and 9218 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:58,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:58,077 INFO L93 Difference]: Finished difference Result 5321 states and 13357 transitions. [2021-06-04 21:45:58,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:45:58,077 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-04 21:45:58,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:58,081 INFO L225 Difference]: With dead ends: 5321 [2021-06-04 21:45:58,081 INFO L226 Difference]: Without dead ends: 5051 [2021-06-04 21:45:58,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 658.0ms TimeCoverageRelationStatistics Valid=899, Invalid=2641, Unknown=0, NotChecked=0, Total=3540 [2021-06-04 21:45:58,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-06-04 21:45:58,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 3428. [2021-06-04 21:45:58,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.7554712576597606) internal successors, (9443), 3427 states have internal predecessors, (9443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:58,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9443 transitions. [2021-06-04 21:45:58,115 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9443 transitions. Word has length 145 [2021-06-04 21:45:58,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:58,115 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9443 transitions. [2021-06-04 21:45:58,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:58,115 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9443 transitions. [2021-06-04 21:45:58,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:45:58,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:58,118 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:58,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-04 21:45:58,319 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:58,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:58,319 INFO L82 PathProgramCache]: Analyzing trace with hash -57147827, now seen corresponding path program 252 times [2021-06-04 21:45:58,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:58,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507052089] [2021-06-04 21:45:58,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:58,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:58,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507052089] [2021-06-04 21:45:58,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507052089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:58,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285953245] [2021-06-04 21:45:58,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:58,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-04 21:45:58,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:58,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:45:58,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:58,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285953245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:58,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:58,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-04 21:45:58,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783151173] [2021-06-04 21:45:58,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:45:58,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:58,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:45:58,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:45:58,893 INFO L87 Difference]: Start difference. First operand 3428 states and 9443 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:59,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:59,515 INFO L93 Difference]: Finished difference Result 5346 states and 13482 transitions. [2021-06-04 21:45:59,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:45:59,516 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-04 21:45:59,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:59,521 INFO L225 Difference]: With dead ends: 5346 [2021-06-04 21:45:59,521 INFO L226 Difference]: Without dead ends: 5076 [2021-06-04 21:45:59,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 738.0ms TimeCoverageRelationStatistics Valid=922, Invalid=2860, Unknown=0, NotChecked=0, Total=3782 [2021-06-04 21:45:59,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5076 states. [2021-06-04 21:45:59,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5076 to 3503. [2021-06-04 21:45:59,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.7607081667618503) internal successors, (9668), 3502 states have internal predecessors, (9668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:59,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9668 transitions. [2021-06-04 21:45:59,557 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9668 transitions. Word has length 145 [2021-06-04 21:45:59,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:59,557 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9668 transitions. [2021-06-04 21:45:59,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:59,557 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9668 transitions. [2021-06-04 21:45:59,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:45:59,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:59,560 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:45:59,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:59,761 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:59,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:59,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1960587451, now seen corresponding path program 253 times [2021-06-04 21:45:59,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:59,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404664381] [2021-06-04 21:45:59,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:00,017 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:00,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:00,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404664381] [2021-06-04 21:46:00,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404664381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:00,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924892978] [2021-06-04 21:46:00,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:00,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:00,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:00,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924892978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:00,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:00,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-04 21:46:00,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015657901] [2021-06-04 21:46:00,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:00,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:00,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:00,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:00,276 INFO L87 Difference]: Start difference. First operand 3503 states and 9668 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:00,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:00,963 INFO L93 Difference]: Finished difference Result 5371 states and 13607 transitions. [2021-06-04 21:46:00,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:46:00,963 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-04 21:46:00,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:00,967 INFO L225 Difference]: With dead ends: 5371 [2021-06-04 21:46:00,968 INFO L226 Difference]: Without dead ends: 5101 [2021-06-04 21:46:00,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 738.7ms TimeCoverageRelationStatistics Valid=930, Invalid=2852, Unknown=0, NotChecked=0, Total=3782 [2021-06-04 21:46:00,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5101 states. [2021-06-04 21:46:00,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5101 to 3578. [2021-06-04 21:46:01,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 2.7657254682694994) internal successors, (9893), 3577 states have internal predecessors, (9893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:01,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 9893 transitions. [2021-06-04 21:46:01,004 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 9893 transitions. Word has length 145 [2021-06-04 21:46:01,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:01,004 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 9893 transitions. [2021-06-04 21:46:01,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:01,004 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 9893 transitions. [2021-06-04 21:46:01,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:01,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:01,007 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:01,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:01,209 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:01,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:01,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1062064011, now seen corresponding path program 254 times [2021-06-04 21:46:01,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:01,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062482016] [2021-06-04 21:46:01,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:01,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:01,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062482016] [2021-06-04 21:46:01,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062482016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:01,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960722502] [2021-06-04 21:46:01,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:01,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:46:01,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:01,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:01,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:01,767 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:01,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960722502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:01,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:01,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-04 21:46:01,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814448277] [2021-06-04 21:46:01,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:01,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:01,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:01,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:01,768 INFO L87 Difference]: Start difference. First operand 3578 states and 9893 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:02,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:02,451 INFO L93 Difference]: Finished difference Result 5396 states and 13732 transitions. [2021-06-04 21:46:02,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:46:02,451 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-04 21:46:02,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:02,456 INFO L225 Difference]: With dead ends: 5396 [2021-06-04 21:46:02,456 INFO L226 Difference]: Without dead ends: 5126 [2021-06-04 21:46:02,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 768.3ms TimeCoverageRelationStatistics Valid=955, Invalid=3077, Unknown=0, NotChecked=0, Total=4032 [2021-06-04 21:46:02,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2021-06-04 21:46:02,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 3653. [2021-06-04 21:46:02,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 2.7705366922234393) internal successors, (10118), 3652 states have internal predecessors, (10118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:02,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10118 transitions. [2021-06-04 21:46:02,499 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10118 transitions. Word has length 145 [2021-06-04 21:46:02,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:02,499 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10118 transitions. [2021-06-04 21:46:02,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:02,499 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10118 transitions. [2021-06-04 21:46:02,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:02,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:02,502 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:02,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:02,705 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:02,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:02,705 INFO L82 PathProgramCache]: Analyzing trace with hash -552889479, now seen corresponding path program 255 times [2021-06-04 21:46:02,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:02,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396240453] [2021-06-04 21:46:02,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:02,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:02,997 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:02,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:02,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396240453] [2021-06-04 21:46:02,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396240453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:02,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282431001] [2021-06-04 21:46:02,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:03,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-04 21:46:03,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:03,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:03,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:03,269 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:03,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282431001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:03,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:03,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-04 21:46:03,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157876195] [2021-06-04 21:46:03,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:03,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:03,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:03,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:03,270 INFO L87 Difference]: Start difference. First operand 3653 states and 10118 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:03,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:03,917 INFO L93 Difference]: Finished difference Result 5421 states and 13857 transitions. [2021-06-04 21:46:03,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:46:03,917 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-04 21:46:03,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:03,922 INFO L225 Difference]: With dead ends: 5421 [2021-06-04 21:46:03,923 INFO L226 Difference]: Without dead ends: 5151 [2021-06-04 21:46:03,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 731.9ms TimeCoverageRelationStatistics Valid=977, Invalid=3055, Unknown=0, NotChecked=0, Total=4032 [2021-06-04 21:46:03,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2021-06-04 21:46:03,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 3728. [2021-06-04 21:46:03,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 3727 states have (on average 2.775154279581433) internal successors, (10343), 3727 states have internal predecessors, (10343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:03,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 10343 transitions. [2021-06-04 21:46:03,964 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 10343 transitions. Word has length 145 [2021-06-04 21:46:03,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:03,965 INFO L482 AbstractCegarLoop]: Abstraction has 3728 states and 10343 transitions. [2021-06-04 21:46:03,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:03,965 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 10343 transitions. [2021-06-04 21:46:03,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:03,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:03,968 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:04,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:04,168 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:04,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:04,169 INFO L82 PathProgramCache]: Analyzing trace with hash -933333431, now seen corresponding path program 256 times [2021-06-04 21:46:04,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:04,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683306971] [2021-06-04 21:46:04,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:04,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:04,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:04,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683306971] [2021-06-04 21:46:04,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683306971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:04,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682661367] [2021-06-04 21:46:04,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:04,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:46:04,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:04,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:04,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:04,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682661367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:04,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:04,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-04 21:46:04,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469478584] [2021-06-04 21:46:04,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:04,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:04,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:04,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:04,750 INFO L87 Difference]: Start difference. First operand 3728 states and 10343 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:05,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:05,496 INFO L93 Difference]: Finished difference Result 5446 states and 13982 transitions. [2021-06-04 21:46:05,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:46:05,496 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-04 21:46:05,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:05,503 INFO L225 Difference]: With dead ends: 5446 [2021-06-04 21:46:05,503 INFO L226 Difference]: Without dead ends: 5176 [2021-06-04 21:46:05,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 847.9ms TimeCoverageRelationStatistics Valid=1004, Invalid=3286, Unknown=0, NotChecked=0, Total=4290 [2021-06-04 21:46:05,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-06-04 21:46:05,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 3803. [2021-06-04 21:46:05,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3803 states, 3802 states have (on average 2.7795896896370333) internal successors, (10568), 3802 states have internal predecessors, (10568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:05,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 10568 transitions. [2021-06-04 21:46:05,545 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 10568 transitions. Word has length 145 [2021-06-04 21:46:05,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:05,545 INFO L482 AbstractCegarLoop]: Abstraction has 3803 states and 10568 transitions. [2021-06-04 21:46:05,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:05,545 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 10568 transitions. [2021-06-04 21:46:05,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:05,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:05,548 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:05,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:05,748 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:05,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:05,749 INFO L82 PathProgramCache]: Analyzing trace with hash -308958281, now seen corresponding path program 257 times [2021-06-04 21:46:05,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:05,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45277120] [2021-06-04 21:46:05,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:05,998 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:05,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:05,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45277120] [2021-06-04 21:46:05,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45277120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:05,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097720512] [2021-06-04 21:46:05,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:06,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-04 21:46:06,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:06,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:06,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:06,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097720512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:06,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:06,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-04 21:46:06,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837228364] [2021-06-04 21:46:06,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:06,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:06,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:06,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:06,259 INFO L87 Difference]: Start difference. First operand 3803 states and 10568 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:06,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:06,950 INFO L93 Difference]: Finished difference Result 5471 states and 14107 transitions. [2021-06-04 21:46:06,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:46:06,950 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-04 21:46:06,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:06,956 INFO L225 Difference]: With dead ends: 5471 [2021-06-04 21:46:06,956 INFO L226 Difference]: Without dead ends: 5201 [2021-06-04 21:46:06,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 726.9ms TimeCoverageRelationStatistics Valid=1040, Invalid=3250, Unknown=0, NotChecked=0, Total=4290 [2021-06-04 21:46:06,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5201 states. [2021-06-04 21:46:06,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5201 to 3878. [2021-06-04 21:46:06,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.7838534949703377) internal successors, (10793), 3877 states have internal predecessors, (10793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:06,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10793 transitions. [2021-06-04 21:46:06,997 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10793 transitions. Word has length 145 [2021-06-04 21:46:06,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:06,997 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10793 transitions. [2021-06-04 21:46:06,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:06,997 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10793 transitions. [2021-06-04 21:46:07,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:07,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:07,000 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:07,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-04 21:46:07,201 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:07,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:07,201 INFO L82 PathProgramCache]: Analyzing trace with hash 500093575, now seen corresponding path program 258 times [2021-06-04 21:46:07,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:07,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688512878] [2021-06-04 21:46:07,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:07,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:07,480 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:07,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:07,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688512878] [2021-06-04 21:46:07,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688512878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:07,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206641730] [2021-06-04 21:46:07,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:07,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-04 21:46:07,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:07,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:07,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:07,781 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:07,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206641730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:07,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:07,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-04 21:46:07,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013053471] [2021-06-04 21:46:07,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:07,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:07,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:07,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:07,782 INFO L87 Difference]: Start difference. First operand 3878 states and 10793 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:08,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:08,595 INFO L93 Difference]: Finished difference Result 5496 states and 14232 transitions. [2021-06-04 21:46:08,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:46:08,595 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-04 21:46:08,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:08,600 INFO L225 Difference]: With dead ends: 5496 [2021-06-04 21:46:08,600 INFO L226 Difference]: Without dead ends: 5226 [2021-06-04 21:46:08,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 860.5ms TimeCoverageRelationStatistics Valid=1069, Invalid=3487, Unknown=0, NotChecked=0, Total=4556 [2021-06-04 21:46:08,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-06-04 21:46:08,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 3953. [2021-06-04 21:46:08,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3952 states have (on average 2.7879554655870447) internal successors, (11018), 3952 states have internal predecessors, (11018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:08,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 11018 transitions. [2021-06-04 21:46:08,640 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 11018 transitions. Word has length 145 [2021-06-04 21:46:08,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:08,640 INFO L482 AbstractCegarLoop]: Abstraction has 3953 states and 11018 transitions. [2021-06-04 21:46:08,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:08,640 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 11018 transitions. [2021-06-04 21:46:08,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:08,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:08,643 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:08,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:08,844 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:08,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:08,844 INFO L82 PathProgramCache]: Analyzing trace with hash -891856523, now seen corresponding path program 259 times [2021-06-04 21:46:08,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:08,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171559662] [2021-06-04 21:46:08,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:09,117 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:09,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:09,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171559662] [2021-06-04 21:46:09,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171559662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:09,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505353072] [2021-06-04 21:46:09,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:09,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:09,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:09,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:09,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505353072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:09,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:09,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-04 21:46:09,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462192934] [2021-06-04 21:46:09,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:09,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:09,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:09,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:09,386 INFO L87 Difference]: Start difference. First operand 3953 states and 11018 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:10,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:10,126 INFO L93 Difference]: Finished difference Result 5521 states and 14357 transitions. [2021-06-04 21:46:10,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:46:10,126 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-04 21:46:10,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:10,131 INFO L225 Difference]: With dead ends: 5521 [2021-06-04 21:46:10,131 INFO L226 Difference]: Without dead ends: 5251 [2021-06-04 21:46:10,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 782.9ms TimeCoverageRelationStatistics Valid=1119, Invalid=3437, Unknown=0, NotChecked=0, Total=4556 [2021-06-04 21:46:10,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2021-06-04 21:46:10,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 4028. [2021-06-04 21:46:10,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4028 states, 4027 states have (on average 2.7919046436553265) internal successors, (11243), 4027 states have internal predecessors, (11243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:10,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4028 states to 4028 states and 11243 transitions. [2021-06-04 21:46:10,173 INFO L78 Accepts]: Start accepts. Automaton has 4028 states and 11243 transitions. Word has length 145 [2021-06-04 21:46:10,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:10,174 INFO L482 AbstractCegarLoop]: Abstraction has 4028 states and 11243 transitions. [2021-06-04 21:46:10,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:10,174 INFO L276 IsEmpty]: Start isEmpty. Operand 4028 states and 11243 transitions. [2021-06-04 21:46:10,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:10,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:10,177 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:10,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-04 21:46:10,377 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:10,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:10,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1136933819, now seen corresponding path program 260 times [2021-06-04 21:46:10,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:10,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460854584] [2021-06-04 21:46:10,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:10,624 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:10,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:10,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460854584] [2021-06-04 21:46:10,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460854584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:10,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651668998] [2021-06-04 21:46:10,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:10,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:46:10,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:10,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:10,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:10,888 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:10,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651668998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:10,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:10,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-04 21:46:10,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714174460] [2021-06-04 21:46:10,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:10,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:10,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:10,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:10,889 INFO L87 Difference]: Start difference. First operand 4028 states and 11243 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:11,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:11,781 INFO L93 Difference]: Finished difference Result 5546 states and 14482 transitions. [2021-06-04 21:46:11,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:46:11,781 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-04 21:46:11,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:11,786 INFO L225 Difference]: With dead ends: 5546 [2021-06-04 21:46:11,786 INFO L226 Difference]: Without dead ends: 5276 [2021-06-04 21:46:11,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 911.5ms TimeCoverageRelationStatistics Valid=1150, Invalid=3680, Unknown=0, NotChecked=0, Total=4830 [2021-06-04 21:46:11,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5276 states. [2021-06-04 21:46:11,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5276 to 4103. [2021-06-04 21:46:11,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4103 states, 4102 states have (on average 2.795709410043881) internal successors, (11468), 4102 states have internal predecessors, (11468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:11,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4103 states to 4103 states and 11468 transitions. [2021-06-04 21:46:11,831 INFO L78 Accepts]: Start accepts. Automaton has 4103 states and 11468 transitions. Word has length 145 [2021-06-04 21:46:11,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:11,831 INFO L482 AbstractCegarLoop]: Abstraction has 4103 states and 11468 transitions. [2021-06-04 21:46:11,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:11,831 INFO L276 IsEmpty]: Start isEmpty. Operand 4103 states and 11468 transitions. [2021-06-04 21:46:11,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:11,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:11,834 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:12,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-04 21:46:12,034 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:12,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:12,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1513784141, now seen corresponding path program 261 times [2021-06-04 21:46:12,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:12,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700938660] [2021-06-04 21:46:12,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:12,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:12,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700938660] [2021-06-04 21:46:12,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700938660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:12,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530320038] [2021-06-04 21:46:12,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:12,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-04 21:46:12,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:12,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:12,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:12,620 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:12,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530320038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:12,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:12,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-04 21:46:12,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159889359] [2021-06-04 21:46:12,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:12,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:12,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:12,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:12,621 INFO L87 Difference]: Start difference. First operand 4103 states and 11468 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:13,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:13,384 INFO L93 Difference]: Finished difference Result 5571 states and 14607 transitions. [2021-06-04 21:46:13,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:46:13,385 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-04 21:46:13,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:13,390 INFO L225 Difference]: With dead ends: 5571 [2021-06-04 21:46:13,391 INFO L226 Difference]: Without dead ends: 5301 [2021-06-04 21:46:13,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 854.9ms TimeCoverageRelationStatistics Valid=1214, Invalid=3616, Unknown=0, NotChecked=0, Total=4830 [2021-06-04 21:46:13,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5301 states. [2021-06-04 21:46:13,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5301 to 4178. [2021-06-04 21:46:13,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4178 states, 4177 states have (on average 2.799377543691645) internal successors, (11693), 4177 states have internal predecessors, (11693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:13,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4178 states to 4178 states and 11693 transitions. [2021-06-04 21:46:13,442 INFO L78 Accepts]: Start accepts. Automaton has 4178 states and 11693 transitions. Word has length 145 [2021-06-04 21:46:13,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:13,442 INFO L482 AbstractCegarLoop]: Abstraction has 4178 states and 11693 transitions. [2021-06-04 21:46:13,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:13,443 INFO L276 IsEmpty]: Start isEmpty. Operand 4178 states and 11693 transitions. [2021-06-04 21:46:13,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:13,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:13,446 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:13,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:13,646 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:13,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:13,646 INFO L82 PathProgramCache]: Analyzing trace with hash -187028605, now seen corresponding path program 262 times [2021-06-04 21:46:13,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:13,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656994287] [2021-06-04 21:46:13,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:13,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:13,885 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:13,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:13,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656994287] [2021-06-04 21:46:13,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656994287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:13,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047819411] [2021-06-04 21:46:13,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:13,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:46:13,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:13,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:13,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:14,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047819411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:14,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:14,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-04 21:46:14,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123129651] [2021-06-04 21:46:14,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:14,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:14,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:14,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:14,145 INFO L87 Difference]: Start difference. First operand 4178 states and 11693 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:15,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:15,150 INFO L93 Difference]: Finished difference Result 5596 states and 14732 transitions. [2021-06-04 21:46:15,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-04 21:46:15,150 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-04 21:46:15,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:15,155 INFO L225 Difference]: With dead ends: 5596 [2021-06-04 21:46:15,155 INFO L226 Difference]: Without dead ends: 5326 [2021-06-04 21:46:15,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 928.6ms TimeCoverageRelationStatistics Valid=1247, Invalid=3865, Unknown=0, NotChecked=0, Total=5112 [2021-06-04 21:46:15,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2021-06-04 21:46:15,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 4253. [2021-06-04 21:46:15,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4253 states, 4252 states have (on average 2.8029162746942617) internal successors, (11918), 4252 states have internal predecessors, (11918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:15,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4253 states to 4253 states and 11918 transitions. [2021-06-04 21:46:15,198 INFO L78 Accepts]: Start accepts. Automaton has 4253 states and 11918 transitions. Word has length 145 [2021-06-04 21:46:15,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:15,198 INFO L482 AbstractCegarLoop]: Abstraction has 4253 states and 11918 transitions. [2021-06-04 21:46:15,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:15,198 INFO L276 IsEmpty]: Start isEmpty. Operand 4253 states and 11918 transitions. [2021-06-04 21:46:15,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:15,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:15,201 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:15,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-04 21:46:15,402 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:15,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:15,402 INFO L82 PathProgramCache]: Analyzing trace with hash 267187569, now seen corresponding path program 263 times [2021-06-04 21:46:15,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:15,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995252160] [2021-06-04 21:46:15,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:15,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:15,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995252160] [2021-06-04 21:46:15,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995252160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:15,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170786158] [2021-06-04 21:46:15,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:15,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-04 21:46:15,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:15,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:15,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:15,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170786158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:15,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:15,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-04 21:46:15,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624310855] [2021-06-04 21:46:15,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:15,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:15,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:15,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:15,910 INFO L87 Difference]: Start difference. First operand 4253 states and 11918 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:16,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:16,738 INFO L93 Difference]: Finished difference Result 5621 states and 14857 transitions. [2021-06-04 21:46:16,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-04 21:46:16,739 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-04 21:46:16,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:16,744 INFO L225 Difference]: With dead ends: 5621 [2021-06-04 21:46:16,744 INFO L226 Difference]: Without dead ends: 5351 [2021-06-04 21:46:16,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 842.7ms TimeCoverageRelationStatistics Valid=1325, Invalid=3787, Unknown=0, NotChecked=0, Total=5112 [2021-06-04 21:46:16,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2021-06-04 21:46:16,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 4328. [2021-06-04 21:46:16,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4328 states, 4327 states have (on average 2.8063323318696556) internal successors, (12143), 4327 states have internal predecessors, (12143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:16,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4328 states to 4328 states and 12143 transitions. [2021-06-04 21:46:16,819 INFO L78 Accepts]: Start accepts. Automaton has 4328 states and 12143 transitions. Word has length 145 [2021-06-04 21:46:16,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:16,819 INFO L482 AbstractCegarLoop]: Abstraction has 4328 states and 12143 transitions. [2021-06-04 21:46:16,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:16,819 INFO L276 IsEmpty]: Start isEmpty. Operand 4328 states and 12143 transitions. [2021-06-04 21:46:16,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:16,822 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:16,822 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:17,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:17,023 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:17,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:17,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1266083905, now seen corresponding path program 264 times [2021-06-04 21:46:17,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:17,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519163171] [2021-06-04 21:46:17,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:17,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:17,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519163171] [2021-06-04 21:46:17,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519163171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:17,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175606026] [2021-06-04 21:46:17,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:17,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-04 21:46:17,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:17,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:17,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:17,531 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:17,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175606026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:17,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:17,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-04 21:46:17,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240374400] [2021-06-04 21:46:17,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:17,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:17,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:17,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:17,532 INFO L87 Difference]: Start difference. First operand 4328 states and 12143 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:18,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:18,513 INFO L93 Difference]: Finished difference Result 5646 states and 14982 transitions. [2021-06-04 21:46:18,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:46:18,513 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-04 21:46:18,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:18,518 INFO L225 Difference]: With dead ends: 5646 [2021-06-04 21:46:18,518 INFO L226 Difference]: Without dead ends: 5376 [2021-06-04 21:46:18,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1390 ImplicationChecksByTransitivity, 972.7ms TimeCoverageRelationStatistics Valid=1360, Invalid=4042, Unknown=0, NotChecked=0, Total=5402 [2021-06-04 21:46:18,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5376 states. [2021-06-04 21:46:18,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5376 to 4403. [2021-06-04 21:46:18,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4403 states, 4402 states have (on average 2.809631985461154) internal successors, (12368), 4402 states have internal predecessors, (12368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:18,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4403 states to 4403 states and 12368 transitions. [2021-06-04 21:46:18,567 INFO L78 Accepts]: Start accepts. Automaton has 4403 states and 12368 transitions. Word has length 145 [2021-06-04 21:46:18,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:18,567 INFO L482 AbstractCegarLoop]: Abstraction has 4403 states and 12368 transitions. [2021-06-04 21:46:18,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:18,567 INFO L276 IsEmpty]: Start isEmpty. Operand 4403 states and 12368 transitions. [2021-06-04 21:46:18,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:18,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:18,571 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:18,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:18,771 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:18,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:18,771 INFO L82 PathProgramCache]: Analyzing trace with hash -613243985, now seen corresponding path program 265 times [2021-06-04 21:46:18,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:18,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958597585] [2021-06-04 21:46:18,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:19,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:19,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958597585] [2021-06-04 21:46:19,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958597585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:19,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729365880] [2021-06-04 21:46:19,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:19,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:19,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:19,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:19,278 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:19,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729365880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:19,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:19,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-04 21:46:19,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221554280] [2021-06-04 21:46:19,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:19,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:19,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:19,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:19,279 INFO L87 Difference]: Start difference. First operand 4403 states and 12368 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:20,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:20,120 INFO L93 Difference]: Finished difference Result 5671 states and 15107 transitions. [2021-06-04 21:46:20,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-04 21:46:20,120 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-04 21:46:20,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:20,126 INFO L225 Difference]: With dead ends: 5671 [2021-06-04 21:46:20,126 INFO L226 Difference]: Without dead ends: 5401 [2021-06-04 21:46:20,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 828.4ms TimeCoverageRelationStatistics Valid=1452, Invalid=3950, Unknown=0, NotChecked=0, Total=5402 [2021-06-04 21:46:20,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2021-06-04 21:46:20,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 4478. [2021-06-04 21:46:20,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4478 states, 4477 states have (on average 2.812821085548358) internal successors, (12593), 4477 states have internal predecessors, (12593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:20,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 12593 transitions. [2021-06-04 21:46:20,171 INFO L78 Accepts]: Start accepts. Automaton has 4478 states and 12593 transitions. Word has length 145 [2021-06-04 21:46:20,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:20,171 INFO L482 AbstractCegarLoop]: Abstraction has 4478 states and 12593 transitions. [2021-06-04 21:46:20,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:20,171 INFO L276 IsEmpty]: Start isEmpty. Operand 4478 states and 12593 transitions. [2021-06-04 21:46:20,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:20,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:20,175 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:20,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:20,375 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:20,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:20,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1417075327, now seen corresponding path program 266 times [2021-06-04 21:46:20,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:20,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35353988] [2021-06-04 21:46:20,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:20,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:20,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35353988] [2021-06-04 21:46:20,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35353988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:20,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529276689] [2021-06-04 21:46:20,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:20,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:46:20,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:20,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:20,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:20,903 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:20,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529276689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:20,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:20,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-04 21:46:20,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703445015] [2021-06-04 21:46:20,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:20,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:20,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:20,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:20,904 INFO L87 Difference]: Start difference. First operand 4478 states and 12593 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:21,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:21,996 INFO L93 Difference]: Finished difference Result 5696 states and 15232 transitions. [2021-06-04 21:46:21,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-04 21:46:21,996 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-04 21:46:21,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:22,001 INFO L225 Difference]: With dead ends: 5696 [2021-06-04 21:46:22,001 INFO L226 Difference]: Without dead ends: 5426 [2021-06-04 21:46:22,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 1095.9ms TimeCoverageRelationStatistics Valid=1489, Invalid=4211, Unknown=0, NotChecked=0, Total=5700 [2021-06-04 21:46:22,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-06-04 21:46:22,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 4553. [2021-06-04 21:46:22,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4553 states, 4552 states have (on average 2.8159050966608086) internal successors, (12818), 4552 states have internal predecessors, (12818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:22,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 12818 transitions. [2021-06-04 21:46:22,058 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 12818 transitions. Word has length 145 [2021-06-04 21:46:22,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:22,058 INFO L482 AbstractCegarLoop]: Abstraction has 4553 states and 12818 transitions. [2021-06-04 21:46:22,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:22,058 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 12818 transitions. [2021-06-04 21:46:22,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:22,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:22,062 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:22,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:22,263 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:22,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:22,263 INFO L82 PathProgramCache]: Analyzing trace with hash 2031314797, now seen corresponding path program 267 times [2021-06-04 21:46:22,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:22,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856852882] [2021-06-04 21:46:22,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:22,504 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:22,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:22,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856852882] [2021-06-04 21:46:22,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856852882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:22,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465987013] [2021-06-04 21:46:22,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:22,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-04 21:46:22,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:22,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:22,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:22,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465987013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:22,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:22,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-04 21:46:22,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133735705] [2021-06-04 21:46:22,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:22,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:22,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:22,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:22,757 INFO L87 Difference]: Start difference. First operand 4553 states and 12818 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:23,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:23,633 INFO L93 Difference]: Finished difference Result 5766 states and 15477 transitions. [2021-06-04 21:46:23,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-04 21:46:23,633 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-04 21:46:23,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:23,639 INFO L225 Difference]: With dead ends: 5766 [2021-06-04 21:46:23,639 INFO L226 Difference]: Without dead ends: 5496 [2021-06-04 21:46:23,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 867.4ms TimeCoverageRelationStatistics Valid=1595, Invalid=4105, Unknown=0, NotChecked=0, Total=5700 [2021-06-04 21:46:23,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5496 states. [2021-06-04 21:46:23,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5496 to 4628. [2021-06-04 21:46:23,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4628 states, 4627 states have (on average 2.822130970391182) internal successors, (13058), 4627 states have internal predecessors, (13058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:23,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4628 states to 4628 states and 13058 transitions. [2021-06-04 21:46:23,688 INFO L78 Accepts]: Start accepts. Automaton has 4628 states and 13058 transitions. Word has length 145 [2021-06-04 21:46:23,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:23,688 INFO L482 AbstractCegarLoop]: Abstraction has 4628 states and 13058 transitions. [2021-06-04 21:46:23,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:23,689 INFO L276 IsEmpty]: Start isEmpty. Operand 4628 states and 13058 transitions. [2021-06-04 21:46:23,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:23,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:23,692 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:23,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:23,892 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:23,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:23,893 INFO L82 PathProgramCache]: Analyzing trace with hash 316072509, now seen corresponding path program 268 times [2021-06-04 21:46:23,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:23,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457979169] [2021-06-04 21:46:23,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:24,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:24,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457979169] [2021-06-04 21:46:24,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457979169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:24,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895257468] [2021-06-04 21:46:24,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:24,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:46:24,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:24,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:24,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:24,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895257468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:24,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:24,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-04 21:46:24,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785783410] [2021-06-04 21:46:24,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:24,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:24,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:24,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:24,415 INFO L87 Difference]: Start difference. First operand 4628 states and 13058 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:25,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:25,547 INFO L93 Difference]: Finished difference Result 6344 states and 17103 transitions. [2021-06-04 21:46:25,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-04 21:46:25,547 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-04 21:46:25,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:25,553 INFO L225 Difference]: With dead ends: 6344 [2021-06-04 21:46:25,553 INFO L226 Difference]: Without dead ends: 5721 [2021-06-04 21:46:25,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 1090.9ms TimeCoverageRelationStatistics Valid=1657, Invalid=4663, Unknown=0, NotChecked=0, Total=6320 [2021-06-04 21:46:25,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5721 states. [2021-06-04 21:46:25,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5721 to 4703. [2021-06-04 21:46:25,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4703 states, 4702 states have (on average 2.8260314759676732) internal successors, (13288), 4702 states have internal predecessors, (13288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:25,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 13288 transitions. [2021-06-04 21:46:25,597 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 13288 transitions. Word has length 145 [2021-06-04 21:46:25,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:25,597 INFO L482 AbstractCegarLoop]: Abstraction has 4703 states and 13288 transitions. [2021-06-04 21:46:25,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:25,597 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 13288 transitions. [2021-06-04 21:46:25,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:25,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:25,601 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:25,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:25,801 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:25,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:25,801 INFO L82 PathProgramCache]: Analyzing trace with hash -716575093, now seen corresponding path program 269 times [2021-06-04 21:46:25,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:25,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709298256] [2021-06-04 21:46:25,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:26,048 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:26,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:26,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709298256] [2021-06-04 21:46:26,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709298256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:26,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317528478] [2021-06-04 21:46:26,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:26,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-04 21:46:26,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:26,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:26,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:26,305 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:26,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317528478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:26,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:26,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-04 21:46:26,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731613267] [2021-06-04 21:46:26,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:26,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:26,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:26,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:26,306 INFO L87 Difference]: Start difference. First operand 4703 states and 13288 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:27,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:27,232 INFO L93 Difference]: Finished difference Result 6548 states and 17771 transitions. [2021-06-04 21:46:27,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-04 21:46:27,233 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-04 21:46:27,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:27,238 INFO L225 Difference]: With dead ends: 6548 [2021-06-04 21:46:27,238 INFO L226 Difference]: Without dead ends: 6278 [2021-06-04 21:46:27,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 924.9ms TimeCoverageRelationStatistics Valid=1755, Invalid=4251, Unknown=0, NotChecked=0, Total=6006 [2021-06-04 21:46:27,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6278 states. [2021-06-04 21:46:27,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6278 to 4883. [2021-06-04 21:46:27,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4883 states, 4882 states have (on average 2.8363375665710775) internal successors, (13847), 4882 states have internal predecessors, (13847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:27,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4883 states to 4883 states and 13847 transitions. [2021-06-04 21:46:27,285 INFO L78 Accepts]: Start accepts. Automaton has 4883 states and 13847 transitions. Word has length 145 [2021-06-04 21:46:27,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:27,285 INFO L482 AbstractCegarLoop]: Abstraction has 4883 states and 13847 transitions. [2021-06-04 21:46:27,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:27,285 INFO L276 IsEmpty]: Start isEmpty. Operand 4883 states and 13847 transitions. [2021-06-04 21:46:27,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:27,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:27,288 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:27,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-04 21:46:27,489 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:27,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:27,489 INFO L82 PathProgramCache]: Analyzing trace with hash -694231843, now seen corresponding path program 270 times [2021-06-04 21:46:27,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:27,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361071863] [2021-06-04 21:46:27,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:27,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:27,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:27,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361071863] [2021-06-04 21:46:27,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361071863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:27,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660311058] [2021-06-04 21:46:27,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:27,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-04 21:46:27,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:27,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:27,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:27,987 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:27,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660311058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:27,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:27,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-04 21:46:27,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592977485] [2021-06-04 21:46:27,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:27,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:27,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:27,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:27,988 INFO L87 Difference]: Start difference. First operand 4883 states and 13847 transitions. Second operand has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:29,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:29,144 INFO L93 Difference]: Finished difference Result 6416 states and 17436 transitions. [2021-06-04 21:46:29,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-04 21:46:29,144 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-04 21:46:29,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:29,150 INFO L225 Difference]: With dead ends: 6416 [2021-06-04 21:46:29,150 INFO L226 Difference]: Without dead ends: 5841 [2021-06-04 21:46:29,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1924 ImplicationChecksByTransitivity, 1144.5ms TimeCoverageRelationStatistics Valid=1844, Invalid=4962, Unknown=0, NotChecked=0, Total=6806 [2021-06-04 21:46:29,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5841 states. [2021-06-04 21:46:29,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5841 to 3124. [2021-06-04 21:46:29,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3124 states, 3123 states have (on average 2.739673390970221) internal successors, (8556), 3123 states have internal predecessors, (8556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:29,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 8556 transitions. [2021-06-04 21:46:29,186 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 8556 transitions. Word has length 145 [2021-06-04 21:46:29,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:29,186 INFO L482 AbstractCegarLoop]: Abstraction has 3124 states and 8556 transitions. [2021-06-04 21:46:29,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:29,186 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 8556 transitions. [2021-06-04 21:46:29,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:29,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:29,188 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:29,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-04 21:46:29,388 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:29,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:29,389 INFO L82 PathProgramCache]: Analyzing trace with hash 652101711, now seen corresponding path program 271 times [2021-06-04 21:46:29,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:29,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158486554] [2021-06-04 21:46:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:29,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:29,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158486554] [2021-06-04 21:46:29,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158486554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:29,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728956300] [2021-06-04 21:46:29,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:29,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:29,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:46:29,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:29,990 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:29,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728956300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:29,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:29,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 32 [2021-06-04 21:46:29,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292375062] [2021-06-04 21:46:29,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:46:29,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:29,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:46:29,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:46:29,991 INFO L87 Difference]: Start difference. First operand 3124 states and 8556 transitions. Second operand has 32 states, 32 states have (on average 5.5625) internal successors, (178), 32 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:30,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:30,643 INFO L93 Difference]: Finished difference Result 4364 states and 11356 transitions. [2021-06-04 21:46:30,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:46:30,643 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.5625) internal successors, (178), 32 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-04 21:46:30,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:30,647 INFO L225 Difference]: With dead ends: 4364 [2021-06-04 21:46:30,647 INFO L226 Difference]: Without dead ends: 4030 [2021-06-04 21:46:30,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 758.9ms TimeCoverageRelationStatistics Valid=1020, Invalid=2762, Unknown=0, NotChecked=0, Total=3782 [2021-06-04 21:46:30,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4030 states. [2021-06-04 21:46:30,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4030 to 3209. [2021-06-04 21:46:30,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3209 states, 3208 states have (on average 2.720074812967581) internal successors, (8726), 3208 states have internal predecessors, (8726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:30,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 8726 transitions. [2021-06-04 21:46:30,676 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 8726 transitions. Word has length 150 [2021-06-04 21:46:30,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:30,676 INFO L482 AbstractCegarLoop]: Abstraction has 3209 states and 8726 transitions. [2021-06-04 21:46:30,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.5625) internal successors, (178), 32 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:30,676 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 8726 transitions. [2021-06-04 21:46:30,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:30,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:30,678 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:30,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-04 21:46:30,879 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:30,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:30,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1417310995, now seen corresponding path program 272 times [2021-06-04 21:46:30,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:30,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400503310] [2021-06-04 21:46:30,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:31,180 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:31,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:31,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400503310] [2021-06-04 21:46:31,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400503310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:31,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400083591] [2021-06-04 21:46:31,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:31,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:46:31,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:31,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:31,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:31,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400083591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:31,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:31,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-04 21:46:31,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089941707] [2021-06-04 21:46:31,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:31,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:31,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:31,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:31,432 INFO L87 Difference]: Start difference. First operand 3209 states and 8726 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:31,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:31,928 INFO L93 Difference]: Finished difference Result 5486 states and 13537 transitions. [2021-06-04 21:46:31,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:46:31,929 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-04 21:46:31,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:31,933 INFO L225 Difference]: With dead ends: 5486 [2021-06-04 21:46:31,933 INFO L226 Difference]: Without dead ends: 5216 [2021-06-04 21:46:31,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 629.4ms TimeCoverageRelationStatistics Valid=854, Invalid=2226, Unknown=0, NotChecked=0, Total=3080 [2021-06-04 21:46:31,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5216 states. [2021-06-04 21:46:31,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5216 to 3353. [2021-06-04 21:46:31,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 2.7276252983293556) internal successors, (9143), 3352 states have internal predecessors, (9143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:31,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9143 transitions. [2021-06-04 21:46:31,968 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9143 transitions. Word has length 150 [2021-06-04 21:46:31,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:31,968 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9143 transitions. [2021-06-04 21:46:31,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:31,968 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9143 transitions. [2021-06-04 21:46:31,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:31,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:31,971 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:32,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2021-06-04 21:46:32,171 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:32,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:32,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1410972189, now seen corresponding path program 273 times [2021-06-04 21:46:32,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:32,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202736341] [2021-06-04 21:46:32,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:32,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:32,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202736341] [2021-06-04 21:46:32,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202736341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:32,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758998379] [2021-06-04 21:46:32,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:32,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-04 21:46:32,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:32,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:32,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:32,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758998379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:32,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:32,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-04 21:46:32,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935026301] [2021-06-04 21:46:32,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:32,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:32,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:32,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:32,785 INFO L87 Difference]: Start difference. First operand 3353 states and 9143 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:33,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:33,373 INFO L93 Difference]: Finished difference Result 5446 states and 13532 transitions. [2021-06-04 21:46:33,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:46:33,374 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-04 21:46:33,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:33,379 INFO L225 Difference]: With dead ends: 5446 [2021-06-04 21:46:33,379 INFO L226 Difference]: Without dead ends: 5176 [2021-06-04 21:46:33,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 725.6ms TimeCoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2021-06-04 21:46:33,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-06-04 21:46:33,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 3428. [2021-06-04 21:46:33,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.7335862270207176) internal successors, (9368), 3427 states have internal predecessors, (9368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:33,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9368 transitions. [2021-06-04 21:46:33,415 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9368 transitions. Word has length 150 [2021-06-04 21:46:33,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:33,415 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9368 transitions. [2021-06-04 21:46:33,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:33,415 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9368 transitions. [2021-06-04 21:46:33,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:33,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:33,418 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:33,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:33,618 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:33,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:33,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1546193583, now seen corresponding path program 274 times [2021-06-04 21:46:33,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:33,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104517658] [2021-06-04 21:46:33,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:33,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:33,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104517658] [2021-06-04 21:46:33,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104517658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:33,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467657130] [2021-06-04 21:46:33,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:33,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:46:33,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:33,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:33,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:34,161 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:34,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467657130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:34,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:34,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-04 21:46:34,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161940291] [2021-06-04 21:46:34,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:34,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:34,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:34,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:34,162 INFO L87 Difference]: Start difference. First operand 3428 states and 9368 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:34,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:34,716 INFO L93 Difference]: Finished difference Result 5496 states and 13707 transitions. [2021-06-04 21:46:34,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:46:34,716 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-04 21:46:34,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:34,721 INFO L225 Difference]: With dead ends: 5496 [2021-06-04 21:46:34,721 INFO L226 Difference]: Without dead ends: 5226 [2021-06-04 21:46:34,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 657.0ms TimeCoverageRelationStatistics Valid=855, Invalid=2451, Unknown=0, NotChecked=0, Total=3306 [2021-06-04 21:46:34,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-06-04 21:46:34,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 3503. [2021-06-04 21:46:34,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.7392918332381497) internal successors, (9593), 3502 states have internal predecessors, (9593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:34,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9593 transitions. [2021-06-04 21:46:34,758 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9593 transitions. Word has length 150 [2021-06-04 21:46:34,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:34,758 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9593 transitions. [2021-06-04 21:46:34,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:34,758 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9593 transitions. [2021-06-04 21:46:34,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:34,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:34,761 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:34,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-06-04 21:46:34,962 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:34,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:34,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1872038945, now seen corresponding path program 275 times [2021-06-04 21:46:34,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:34,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664525956] [2021-06-04 21:46:34,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:35,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:35,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664525956] [2021-06-04 21:46:35,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664525956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:35,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30862846] [2021-06-04 21:46:35,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:35,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-04 21:46:35,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:35,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:35,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:35,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30862846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:35,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:35,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-04 21:46:35,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183702886] [2021-06-04 21:46:35,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:35,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:35,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:35,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:35,561 INFO L87 Difference]: Start difference. First operand 3503 states and 9593 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:36,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:36,274 INFO L93 Difference]: Finished difference Result 5521 states and 13832 transitions. [2021-06-04 21:46:36,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:46:36,274 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-04 21:46:36,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:36,279 INFO L225 Difference]: With dead ends: 5521 [2021-06-04 21:46:36,279 INFO L226 Difference]: Without dead ends: 5251 [2021-06-04 21:46:36,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 761.8ms TimeCoverageRelationStatistics Valid=938, Invalid=2844, Unknown=0, NotChecked=0, Total=3782 [2021-06-04 21:46:36,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2021-06-04 21:46:36,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 3578. [2021-06-04 21:46:36,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 2.7447581772435004) internal successors, (9818), 3577 states have internal predecessors, (9818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:36,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 9818 transitions. [2021-06-04 21:46:36,317 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 9818 transitions. Word has length 150 [2021-06-04 21:46:36,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:36,318 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 9818 transitions. [2021-06-04 21:46:36,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:36,318 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 9818 transitions. [2021-06-04 21:46:36,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:36,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:36,320 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:36,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:36,521 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:36,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:36,521 INFO L82 PathProgramCache]: Analyzing trace with hash 134712591, now seen corresponding path program 276 times [2021-06-04 21:46:36,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:36,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285883058] [2021-06-04 21:46:36,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:36,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:36,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:36,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285883058] [2021-06-04 21:46:36,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285883058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:36,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283014838] [2021-06-04 21:46:36,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:36,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-04 21:46:36,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:36,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:36,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:37,057 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:37,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283014838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:37,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:37,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-04 21:46:37,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490363031] [2021-06-04 21:46:37,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:37,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:37,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:37,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:37,059 INFO L87 Difference]: Start difference. First operand 3578 states and 9818 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:37,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:37,664 INFO L93 Difference]: Finished difference Result 5546 states and 13957 transitions. [2021-06-04 21:46:37,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:46:37,665 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-04 21:46:37,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:37,670 INFO L225 Difference]: With dead ends: 5546 [2021-06-04 21:46:37,670 INFO L226 Difference]: Without dead ends: 5276 [2021-06-04 21:46:37,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 682.5ms TimeCoverageRelationStatistics Valid=872, Invalid=2668, Unknown=0, NotChecked=0, Total=3540 [2021-06-04 21:46:37,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5276 states. [2021-06-04 21:46:37,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5276 to 3653. [2021-06-04 21:46:37,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 2.75) internal successors, (10043), 3652 states have internal predecessors, (10043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:37,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10043 transitions. [2021-06-04 21:46:37,709 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10043 transitions. Word has length 150 [2021-06-04 21:46:37,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:37,709 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10043 transitions. [2021-06-04 21:46:37,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:37,709 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10043 transitions. [2021-06-04 21:46:37,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:37,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:37,712 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:37,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:37,912 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:37,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:37,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1499260895, now seen corresponding path program 277 times [2021-06-04 21:46:37,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:37,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211712470] [2021-06-04 21:46:37,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:37,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:38,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:38,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211712470] [2021-06-04 21:46:38,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211712470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:38,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482684824] [2021-06-04 21:46:38,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:38,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:38,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:38,492 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:38,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482684824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:38,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:38,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-04 21:46:38,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948290426] [2021-06-04 21:46:38,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:38,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:38,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:38,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:38,493 INFO L87 Difference]: Start difference. First operand 3653 states and 10043 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:39,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:39,207 INFO L93 Difference]: Finished difference Result 5571 states and 14082 transitions. [2021-06-04 21:46:39,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:46:39,208 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-04 21:46:39,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:39,213 INFO L225 Difference]: With dead ends: 5571 [2021-06-04 21:46:39,213 INFO L226 Difference]: Without dead ends: 5301 [2021-06-04 21:46:39,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 801.6ms TimeCoverageRelationStatistics Valid=963, Invalid=3069, Unknown=0, NotChecked=0, Total=4032 [2021-06-04 21:46:39,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5301 states. [2021-06-04 21:46:39,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5301 to 3728. [2021-06-04 21:46:39,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 3727 states have (on average 2.7550308559162864) internal successors, (10268), 3727 states have internal predecessors, (10268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:39,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 10268 transitions. [2021-06-04 21:46:39,250 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 10268 transitions. Word has length 150 [2021-06-04 21:46:39,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:39,250 INFO L482 AbstractCegarLoop]: Abstraction has 3728 states and 10268 transitions. [2021-06-04 21:46:39,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:39,251 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 10268 transitions. [2021-06-04 21:46:39,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:39,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:39,253 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:39,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:39,454 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:39,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:39,454 INFO L82 PathProgramCache]: Analyzing trace with hash -777971123, now seen corresponding path program 278 times [2021-06-04 21:46:39,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:39,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829580520] [2021-06-04 21:46:39,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:39,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:39,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:39,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829580520] [2021-06-04 21:46:39,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829580520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:39,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714040661] [2021-06-04 21:46:39,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:39,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:46:39,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:39,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:39,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:39,973 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:39,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714040661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:39,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:39,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-04 21:46:39,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799413848] [2021-06-04 21:46:39,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:39,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:39,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:39,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:39,974 INFO L87 Difference]: Start difference. First operand 3728 states and 10268 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:40,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:40,622 INFO L93 Difference]: Finished difference Result 5596 states and 14207 transitions. [2021-06-04 21:46:40,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:46:40,622 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-04 21:46:40,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:40,627 INFO L225 Difference]: With dead ends: 5596 [2021-06-04 21:46:40,627 INFO L226 Difference]: Without dead ends: 5326 [2021-06-04 21:46:40,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 708.5ms TimeCoverageRelationStatistics Valid=905, Invalid=2877, Unknown=0, NotChecked=0, Total=3782 [2021-06-04 21:46:40,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2021-06-04 21:46:40,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 3803. [2021-06-04 21:46:40,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3803 states, 3802 states have (on average 2.759863229879011) internal successors, (10493), 3802 states have internal predecessors, (10493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:40,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 10493 transitions. [2021-06-04 21:46:40,665 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 10493 transitions. Word has length 150 [2021-06-04 21:46:40,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:40,665 INFO L482 AbstractCegarLoop]: Abstraction has 3803 states and 10493 transitions. [2021-06-04 21:46:40,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:40,665 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 10493 transitions. [2021-06-04 21:46:40,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:40,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:40,668 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:40,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:40,869 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:40,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:40,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1676494563, now seen corresponding path program 279 times [2021-06-04 21:46:40,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:40,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365697947] [2021-06-04 21:46:40,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:40,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:41,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:41,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365697947] [2021-06-04 21:46:41,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365697947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:41,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111083282] [2021-06-04 21:46:41,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:41,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-04 21:46:41,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:41,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:41,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:41,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111083282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:41,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:41,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-04 21:46:41,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172972036] [2021-06-04 21:46:41,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:41,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:41,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:41,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:41,444 INFO L87 Difference]: Start difference. First operand 3803 states and 10493 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:42,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:42,204 INFO L93 Difference]: Finished difference Result 5621 states and 14332 transitions. [2021-06-04 21:46:42,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:46:42,204 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-04 21:46:42,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:42,210 INFO L225 Difference]: With dead ends: 5621 [2021-06-04 21:46:42,210 INFO L226 Difference]: Without dead ends: 5351 [2021-06-04 21:46:42,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 857.8ms TimeCoverageRelationStatistics Valid=1004, Invalid=3286, Unknown=0, NotChecked=0, Total=4290 [2021-06-04 21:46:42,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2021-06-04 21:46:42,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 3878. [2021-06-04 21:46:42,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.7645086407015733) internal successors, (10718), 3877 states have internal predecessors, (10718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:42,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10718 transitions. [2021-06-04 21:46:42,252 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10718 transitions. Word has length 150 [2021-06-04 21:46:42,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:42,252 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10718 transitions. [2021-06-04 21:46:42,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:42,253 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10718 transitions. [2021-06-04 21:46:42,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:42,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:42,255 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:42,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-06-04 21:46:42,456 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:42,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:42,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1003519243, now seen corresponding path program 280 times [2021-06-04 21:46:42,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:42,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330490112] [2021-06-04 21:46:42,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:42,749 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:42,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:42,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330490112] [2021-06-04 21:46:42,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330490112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:42,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536306304] [2021-06-04 21:46:42,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:42,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:46:42,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:42,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:42,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:42,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536306304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:42,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:42,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-04 21:46:42,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769473635] [2021-06-04 21:46:42,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:42,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:42,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:42,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:42,994 INFO L87 Difference]: Start difference. First operand 3878 states and 10718 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:43,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:43,726 INFO L93 Difference]: Finished difference Result 5646 states and 14457 transitions. [2021-06-04 21:46:43,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:46:43,726 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-04 21:46:43,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:43,731 INFO L225 Difference]: With dead ends: 5646 [2021-06-04 21:46:43,731 INFO L226 Difference]: Without dead ends: 5376 [2021-06-04 21:46:43,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 747.4ms TimeCoverageRelationStatistics Valid=954, Invalid=3078, Unknown=0, NotChecked=0, Total=4032 [2021-06-04 21:46:43,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5376 states. [2021-06-04 21:46:43,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5376 to 3953. [2021-06-04 21:46:43,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3952 states have (on average 2.7689777327935223) internal successors, (10943), 3952 states have internal predecessors, (10943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:43,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 10943 transitions. [2021-06-04 21:46:43,790 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 10943 transitions. Word has length 150 [2021-06-04 21:46:43,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:43,790 INFO L482 AbstractCegarLoop]: Abstraction has 3953 states and 10943 transitions. [2021-06-04 21:46:43,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:43,790 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 10943 transitions. [2021-06-04 21:46:43,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:43,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:43,793 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:43,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-06-04 21:46:43,993 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:43,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:43,994 INFO L82 PathProgramCache]: Analyzing trace with hash 623075291, now seen corresponding path program 281 times [2021-06-04 21:46:43,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:43,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428127440] [2021-06-04 21:46:43,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:44,265 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:44,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:44,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428127440] [2021-06-04 21:46:44,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428127440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:44,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760612255] [2021-06-04 21:46:44,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:44,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-04 21:46:44,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:44,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:44,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:44,523 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:44,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760612255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:44,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:44,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-04 21:46:44,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216486669] [2021-06-04 21:46:44,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:44,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:44,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:44,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:44,524 INFO L87 Difference]: Start difference. First operand 3953 states and 10943 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:45,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:45,376 INFO L93 Difference]: Finished difference Result 5671 states and 14582 transitions. [2021-06-04 21:46:45,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:46:45,377 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-04 21:46:45,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:45,382 INFO L225 Difference]: With dead ends: 5671 [2021-06-04 21:46:45,382 INFO L226 Difference]: Without dead ends: 5401 [2021-06-04 21:46:45,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 879.5ms TimeCoverageRelationStatistics Valid=1061, Invalid=3495, Unknown=0, NotChecked=0, Total=4556 [2021-06-04 21:46:45,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2021-06-04 21:46:45,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 4028. [2021-06-04 21:46:45,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4028 states, 4027 states have (on average 2.7732803575862923) internal successors, (11168), 4027 states have internal predecessors, (11168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:45,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4028 states to 4028 states and 11168 transitions. [2021-06-04 21:46:45,423 INFO L78 Accepts]: Start accepts. Automaton has 4028 states and 11168 transitions. Word has length 150 [2021-06-04 21:46:45,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:45,423 INFO L482 AbstractCegarLoop]: Abstraction has 4028 states and 11168 transitions. [2021-06-04 21:46:45,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:45,423 INFO L276 IsEmpty]: Start isEmpty. Operand 4028 states and 11168 transitions. [2021-06-04 21:46:45,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:45,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:45,426 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:45,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-06-04 21:46:45,628 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:45,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:45,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1247450441, now seen corresponding path program 282 times [2021-06-04 21:46:45,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:45,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989535709] [2021-06-04 21:46:45,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:45,892 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:45,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:45,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989535709] [2021-06-04 21:46:45,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989535709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:45,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664165587] [2021-06-04 21:46:45,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:45,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-04 21:46:45,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:45,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:45,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:46,146 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:46,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664165587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:46,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:46,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-04 21:46:46,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103728735] [2021-06-04 21:46:46,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:46,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:46,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:46,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:46,147 INFO L87 Difference]: Start difference. First operand 4028 states and 11168 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:46,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:46,959 INFO L93 Difference]: Finished difference Result 5696 states and 14707 transitions. [2021-06-04 21:46:46,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:46:46,959 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-04 21:46:46,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:46,964 INFO L225 Difference]: With dead ends: 5696 [2021-06-04 21:46:46,964 INFO L226 Difference]: Without dead ends: 5426 [2021-06-04 21:46:46,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 762.4ms TimeCoverageRelationStatistics Valid=1019, Invalid=3271, Unknown=0, NotChecked=0, Total=4290 [2021-06-04 21:46:46,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-06-04 21:46:46,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 4103. [2021-06-04 21:46:47,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4103 states, 4102 states have (on average 2.7774256460263285) internal successors, (11393), 4102 states have internal predecessors, (11393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:47,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4103 states to 4103 states and 11393 transitions. [2021-06-04 21:46:47,005 INFO L78 Accepts]: Start accepts. Automaton has 4103 states and 11393 transitions. Word has length 150 [2021-06-04 21:46:47,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:47,005 INFO L482 AbstractCegarLoop]: Abstraction has 4103 states and 11393 transitions. [2021-06-04 21:46:47,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:47,005 INFO L276 IsEmpty]: Start isEmpty. Operand 4103 states and 11393 transitions. [2021-06-04 21:46:47,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:47,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:47,008 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:47,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:47,209 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:47,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:47,209 INFO L82 PathProgramCache]: Analyzing trace with hash 2056502297, now seen corresponding path program 283 times [2021-06-04 21:46:47,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:47,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070236350] [2021-06-04 21:46:47,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:47,472 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:47,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:47,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070236350] [2021-06-04 21:46:47,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070236350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:47,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396417004] [2021-06-04 21:46:47,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:47,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:47,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:47,727 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:47,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396417004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:47,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:47,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-04 21:46:47,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881779765] [2021-06-04 21:46:47,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:47,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:47,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:47,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:47,728 INFO L87 Difference]: Start difference. First operand 4103 states and 11393 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:48,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:48,669 INFO L93 Difference]: Finished difference Result 5721 states and 14832 transitions. [2021-06-04 21:46:48,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:46:48,670 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-04 21:46:48,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:48,675 INFO L225 Difference]: With dead ends: 5721 [2021-06-04 21:46:48,675 INFO L226 Difference]: Without dead ends: 5451 [2021-06-04 21:46:48,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 921.1ms TimeCoverageRelationStatistics Valid=1134, Invalid=3696, Unknown=0, NotChecked=0, Total=4830 [2021-06-04 21:46:48,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5451 states. [2021-06-04 21:46:48,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5451 to 4178. [2021-06-04 21:46:48,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4178 states, 4177 states have (on average 2.7814220732583195) internal successors, (11618), 4177 states have internal predecessors, (11618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:48,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4178 states to 4178 states and 11618 transitions. [2021-06-04 21:46:48,718 INFO L78 Accepts]: Start accepts. Automaton has 4178 states and 11618 transitions. Word has length 150 [2021-06-04 21:46:48,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:48,718 INFO L482 AbstractCegarLoop]: Abstraction has 4178 states and 11618 transitions. [2021-06-04 21:46:48,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:48,718 INFO L276 IsEmpty]: Start isEmpty. Operand 4178 states and 11618 transitions. [2021-06-04 21:46:48,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:48,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:48,721 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:48,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:48,922 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:48,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:48,922 INFO L82 PathProgramCache]: Analyzing trace with hash 664552199, now seen corresponding path program 284 times [2021-06-04 21:46:48,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:48,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297589167] [2021-06-04 21:46:48,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:48,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:49,205 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:49,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:49,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297589167] [2021-06-04 21:46:49,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297589167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:49,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755280056] [2021-06-04 21:46:49,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:49,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:46:49,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:49,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:49,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:49,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755280056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:49,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:49,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-04 21:46:49,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186641671] [2021-06-04 21:46:49,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:49,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:49,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:49,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:49,476 INFO L87 Difference]: Start difference. First operand 4178 states and 11618 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:50,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:50,236 INFO L93 Difference]: Finished difference Result 5746 states and 14957 transitions. [2021-06-04 21:46:50,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:46:50,236 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-04 21:46:50,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:50,241 INFO L225 Difference]: With dead ends: 5746 [2021-06-04 21:46:50,241 INFO L226 Difference]: Without dead ends: 5476 [2021-06-04 21:46:50,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 810.8ms TimeCoverageRelationStatistics Valid=1100, Invalid=3456, Unknown=0, NotChecked=0, Total=4556 [2021-06-04 21:46:50,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5476 states. [2021-06-04 21:46:50,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5476 to 4253. [2021-06-04 21:46:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4253 states, 4252 states have (on average 2.785277516462841) internal successors, (11843), 4252 states have internal predecessors, (11843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:50,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4253 states to 4253 states and 11843 transitions. [2021-06-04 21:46:50,285 INFO L78 Accepts]: Start accepts. Automaton has 4253 states and 11843 transitions. Word has length 150 [2021-06-04 21:46:50,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:50,285 INFO L482 AbstractCegarLoop]: Abstraction has 4253 states and 11843 transitions. [2021-06-04 21:46:50,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:50,285 INFO L276 IsEmpty]: Start isEmpty. Operand 4253 states and 11843 transitions. [2021-06-04 21:46:50,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:50,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:50,288 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:50,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:50,489 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:50,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:50,489 INFO L82 PathProgramCache]: Analyzing trace with hash 419474903, now seen corresponding path program 285 times [2021-06-04 21:46:50,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:50,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178446675] [2021-06-04 21:46:50,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:50,755 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:50,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:50,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178446675] [2021-06-04 21:46:50,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178446675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:50,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965246433] [2021-06-04 21:46:50,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:50,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-04 21:46:50,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:50,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:50,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:51,022 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:51,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965246433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:51,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:51,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-04 21:46:51,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162970822] [2021-06-04 21:46:51,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:51,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:51,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:51,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:51,024 INFO L87 Difference]: Start difference. First operand 4253 states and 11843 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:52,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:52,010 INFO L93 Difference]: Finished difference Result 5771 states and 15082 transitions. [2021-06-04 21:46:52,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-04 21:46:52,011 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-04 21:46:52,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:52,016 INFO L225 Difference]: With dead ends: 5771 [2021-06-04 21:46:52,016 INFO L226 Difference]: Without dead ends: 5501 [2021-06-04 21:46:52,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 973.6ms TimeCoverageRelationStatistics Valid=1223, Invalid=3889, Unknown=0, NotChecked=0, Total=5112 [2021-06-04 21:46:52,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5501 states. [2021-06-04 21:46:52,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5501 to 4328. [2021-06-04 21:46:52,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4328 states, 4327 states have (on average 2.7889993066789924) internal successors, (12068), 4327 states have internal predecessors, (12068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:52,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4328 states to 4328 states and 12068 transitions. [2021-06-04 21:46:52,079 INFO L78 Accepts]: Start accepts. Automaton has 4328 states and 12068 transitions. Word has length 150 [2021-06-04 21:46:52,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:52,079 INFO L482 AbstractCegarLoop]: Abstraction has 4328 states and 12068 transitions. [2021-06-04 21:46:52,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:52,079 INFO L276 IsEmpty]: Start isEmpty. Operand 4328 states and 12068 transitions. [2021-06-04 21:46:52,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:52,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:52,082 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:52,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:52,283 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:52,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:52,283 INFO L82 PathProgramCache]: Analyzing trace with hash 42624581, now seen corresponding path program 286 times [2021-06-04 21:46:52,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:52,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537143444] [2021-06-04 21:46:52,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:52,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:52,532 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:52,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:52,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537143444] [2021-06-04 21:46:52,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537143444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:52,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593223528] [2021-06-04 21:46:52,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:52,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:46:52,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:52,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:52,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:52,773 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:52,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593223528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:52,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:52,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-04 21:46:52,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020843099] [2021-06-04 21:46:52,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:52,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:52,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:52,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:52,774 INFO L87 Difference]: Start difference. First operand 4328 states and 12068 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:53,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:53,577 INFO L93 Difference]: Finished difference Result 5796 states and 15207 transitions. [2021-06-04 21:46:53,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:46:53,577 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-04 21:46:53,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:53,582 INFO L225 Difference]: With dead ends: 5796 [2021-06-04 21:46:53,583 INFO L226 Difference]: Without dead ends: 5526 [2021-06-04 21:46:53,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1156 ImplicationChecksByTransitivity, 820.4ms TimeCoverageRelationStatistics Valid=1197, Invalid=3633, Unknown=0, NotChecked=0, Total=4830 [2021-06-04 21:46:53,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5526 states. [2021-06-04 21:46:53,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5526 to 4403. [2021-06-04 21:46:53,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4403 states, 4402 states have (on average 2.7925942753293955) internal successors, (12293), 4402 states have internal predecessors, (12293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:53,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4403 states to 4403 states and 12293 transitions. [2021-06-04 21:46:53,627 INFO L78 Accepts]: Start accepts. Automaton has 4403 states and 12293 transitions. Word has length 150 [2021-06-04 21:46:53,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:53,627 INFO L482 AbstractCegarLoop]: Abstraction has 4403 states and 12293 transitions. [2021-06-04 21:46:53,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:53,628 INFO L276 IsEmpty]: Start isEmpty. Operand 4403 states and 12293 transitions. [2021-06-04 21:46:53,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:53,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:53,631 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:53,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,290 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:53,831 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:53,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:53,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1369380117, now seen corresponding path program 287 times [2021-06-04 21:46:53,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:53,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708024439] [2021-06-04 21:46:53,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:53,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:54,085 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:54,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:54,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708024439] [2021-06-04 21:46:54,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708024439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:54,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984363552] [2021-06-04 21:46:54,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:54,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-04 21:46:54,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:54,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:54,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:54,345 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:54,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984363552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:54,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:54,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-04 21:46:54,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643802891] [2021-06-04 21:46:54,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:54,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:54,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:54,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:54,346 INFO L87 Difference]: Start difference. First operand 4403 states and 12293 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:55,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:55,373 INFO L93 Difference]: Finished difference Result 5821 states and 15332 transitions. [2021-06-04 21:46:55,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:46:55,374 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-04 21:46:55,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:55,378 INFO L225 Difference]: With dead ends: 5821 [2021-06-04 21:46:55,379 INFO L226 Difference]: Without dead ends: 5551 [2021-06-04 21:46:55,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 1026.9ms TimeCoverageRelationStatistics Valid=1328, Invalid=4074, Unknown=0, NotChecked=0, Total=5402 [2021-06-04 21:46:55,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5551 states. [2021-06-04 21:46:55,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5551 to 4478. [2021-06-04 21:46:55,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4478 states, 4477 states have (on average 2.796068796068796) internal successors, (12518), 4477 states have internal predecessors, (12518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:55,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 12518 transitions. [2021-06-04 21:46:55,424 INFO L78 Accepts]: Start accepts. Automaton has 4478 states and 12518 transitions. Word has length 150 [2021-06-04 21:46:55,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:55,424 INFO L482 AbstractCegarLoop]: Abstraction has 4478 states and 12518 transitions. [2021-06-04 21:46:55,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:55,424 INFO L276 IsEmpty]: Start isEmpty. Operand 4478 states and 12518 transitions. [2021-06-04 21:46:55,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:55,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:55,427 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:55,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:55,628 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:55,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:55,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1823596291, now seen corresponding path program 288 times [2021-06-04 21:46:55,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:55,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424836491] [2021-06-04 21:46:55,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:55,901 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:55,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:55,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424836491] [2021-06-04 21:46:55,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424836491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:55,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392617548] [2021-06-04 21:46:55,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:56,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-04 21:46:56,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:56,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:56,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:56,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392617548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:56,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:56,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-04 21:46:56,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965207028] [2021-06-04 21:46:56,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:56,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:56,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:56,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:56,176 INFO L87 Difference]: Start difference. First operand 4478 states and 12518 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:57,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:57,040 INFO L93 Difference]: Finished difference Result 5846 states and 15457 transitions. [2021-06-04 21:46:57,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-04 21:46:57,040 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-04 21:46:57,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:57,046 INFO L225 Difference]: With dead ends: 5846 [2021-06-04 21:46:57,046 INFO L226 Difference]: Without dead ends: 5576 [2021-06-04 21:46:57,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 886.2ms TimeCoverageRelationStatistics Valid=1310, Invalid=3802, Unknown=0, NotChecked=0, Total=5112 [2021-06-04 21:46:57,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5576 states. [2021-06-04 21:46:57,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5576 to 4553. [2021-06-04 21:46:57,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4553 states, 4552 states have (on average 2.7994288224956065) internal successors, (12743), 4552 states have internal predecessors, (12743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:57,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 12743 transitions. [2021-06-04 21:46:57,093 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 12743 transitions. Word has length 150 [2021-06-04 21:46:57,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:57,093 INFO L482 AbstractCegarLoop]: Abstraction has 4553 states and 12743 transitions. [2021-06-04 21:46:57,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:57,093 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 12743 transitions. [2021-06-04 21:46:57,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:57,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:57,097 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:57,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:57,297 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:57,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:57,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1472474669, now seen corresponding path program 289 times [2021-06-04 21:46:57,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:57,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088814107] [2021-06-04 21:46:57,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:57,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:57,551 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:57,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:57,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088814107] [2021-06-04 21:46:57,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088814107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:57,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056874966] [2021-06-04 21:46:57,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:57,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:57,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:57,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056874966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:57,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:57,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-04 21:46:57,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40439941] [2021-06-04 21:46:57,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:57,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:57,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:57,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:57,829 INFO L87 Difference]: Start difference. First operand 4553 states and 12743 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:58,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:58,892 INFO L93 Difference]: Finished difference Result 5871 states and 15582 transitions. [2021-06-04 21:46:58,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-04 21:46:58,893 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-04 21:46:58,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:58,898 INFO L225 Difference]: With dead ends: 5871 [2021-06-04 21:46:58,898 INFO L226 Difference]: Without dead ends: 5601 [2021-06-04 21:46:58,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1062.4ms TimeCoverageRelationStatistics Valid=1449, Invalid=4251, Unknown=0, NotChecked=0, Total=5700 [2021-06-04 21:46:58,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5601 states. [2021-06-04 21:46:58,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5601 to 4628. [2021-06-04 21:46:58,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4628 states, 4627 states have (on average 2.802679922195807) internal successors, (12968), 4627 states have internal predecessors, (12968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:58,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4628 states to 4628 states and 12968 transitions. [2021-06-04 21:46:58,946 INFO L78 Accepts]: Start accepts. Automaton has 4628 states and 12968 transitions. Word has length 150 [2021-06-04 21:46:58,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:58,946 INFO L482 AbstractCegarLoop]: Abstraction has 4628 states and 12968 transitions. [2021-06-04 21:46:58,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:58,946 INFO L276 IsEmpty]: Start isEmpty. Operand 4628 states and 12968 transitions. [2021-06-04 21:46:58,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:58,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:58,950 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:46:59,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:59,150 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:59,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:59,150 INFO L82 PathProgramCache]: Analyzing trace with hash 943164737, now seen corresponding path program 290 times [2021-06-04 21:46:59,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:59,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597113679] [2021-06-04 21:46:59,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:59,394 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:59,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:59,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597113679] [2021-06-04 21:46:59,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597113679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:59,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336443314] [2021-06-04 21:46:59,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:59,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:46:59,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:59,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:59,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:59,629 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:59,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336443314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:59,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:59,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-04 21:46:59,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382900086] [2021-06-04 21:46:59,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:59,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:59,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:59,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:59,630 INFO L87 Difference]: Start difference. First operand 4628 states and 12968 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:00,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:00,519 INFO L93 Difference]: Finished difference Result 5896 states and 15707 transitions. [2021-06-04 21:47:00,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-04 21:47:00,520 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-04 21:47:00,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:00,524 INFO L225 Difference]: With dead ends: 5896 [2021-06-04 21:47:00,524 INFO L226 Difference]: Without dead ends: 5626 [2021-06-04 21:47:00,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 897.1ms TimeCoverageRelationStatistics Valid=1439, Invalid=3963, Unknown=0, NotChecked=0, Total=5402 [2021-06-04 21:47:00,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5626 states. [2021-06-04 21:47:00,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5626 to 4703. [2021-06-04 21:47:00,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4703 states, 4702 states have (on average 2.8058273075287112) internal successors, (13193), 4702 states have internal predecessors, (13193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:00,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 13193 transitions. [2021-06-04 21:47:00,571 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 13193 transitions. Word has length 150 [2021-06-04 21:47:00,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:00,572 INFO L482 AbstractCegarLoop]: Abstraction has 4703 states and 13193 transitions. [2021-06-04 21:47:00,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:00,572 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 13193 transitions. [2021-06-04 21:47:00,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:47:00,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:00,575 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:00,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-06-04 21:47:00,776 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:00,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:00,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1321483247, now seen corresponding path program 291 times [2021-06-04 21:47:00,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:00,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064025294] [2021-06-04 21:47:00,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:00,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:01,022 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:01,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:01,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064025294] [2021-06-04 21:47:01,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064025294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:01,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854076370] [2021-06-04 21:47:01,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:01,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-04 21:47:01,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:01,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:47:01,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:01,282 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:01,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854076370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:01,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:01,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-04 21:47:01,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092561636] [2021-06-04 21:47:01,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:01,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:01,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:01,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:01,283 INFO L87 Difference]: Start difference. First operand 4703 states and 13193 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:02,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:02,397 INFO L93 Difference]: Finished difference Result 5921 states and 15832 transitions. [2021-06-04 21:47:02,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-04 21:47:02,397 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-04 21:47:02,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:02,403 INFO L225 Difference]: With dead ends: 5921 [2021-06-04 21:47:02,403 INFO L226 Difference]: Without dead ends: 5651 [2021-06-04 21:47:02,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 1103.2ms TimeCoverageRelationStatistics Valid=1586, Invalid=4420, Unknown=0, NotChecked=0, Total=6006 [2021-06-04 21:47:02,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5651 states. [2021-06-04 21:47:02,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5651 to 4778. [2021-06-04 21:47:02,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4778 states, 4777 states have (on average 2.808875863512665) internal successors, (13418), 4777 states have internal predecessors, (13418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:02,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4778 states to 4778 states and 13418 transitions. [2021-06-04 21:47:02,465 INFO L78 Accepts]: Start accepts. Automaton has 4778 states and 13418 transitions. Word has length 150 [2021-06-04 21:47:02,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:02,465 INFO L482 AbstractCegarLoop]: Abstraction has 4778 states and 13418 transitions. [2021-06-04 21:47:02,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:02,465 INFO L276 IsEmpty]: Start isEmpty. Operand 4778 states and 13418 transitions. [2021-06-04 21:47:02,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:47:02,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:02,468 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:02,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:02,669 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:02,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:02,669 INFO L82 PathProgramCache]: Analyzing trace with hash -707243777, now seen corresponding path program 292 times [2021-06-04 21:47:02,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:02,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554196982] [2021-06-04 21:47:02,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:02,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:02,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554196982] [2021-06-04 21:47:02,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554196982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:02,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406626035] [2021-06-04 21:47:02,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:02,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:47:02,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:02,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:47:02,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:03,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406626035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:03,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:03,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-04 21:47:03,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937619129] [2021-06-04 21:47:03,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:47:03,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:03,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:47:03,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:47:03,176 INFO L87 Difference]: Start difference. First operand 4778 states and 13418 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:04,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:04,098 INFO L93 Difference]: Finished difference Result 5991 states and 16077 transitions. [2021-06-04 21:47:04,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-04 21:47:04,098 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-04 21:47:04,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:04,104 INFO L225 Difference]: With dead ends: 5991 [2021-06-04 21:47:04,104 INFO L226 Difference]: Without dead ends: 5721 [2021-06-04 21:47:04,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 916.3ms TimeCoverageRelationStatistics Valid=1584, Invalid=4116, Unknown=0, NotChecked=0, Total=5700 [2021-06-04 21:47:04,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5721 states. [2021-06-04 21:47:04,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5721 to 4853. [2021-06-04 21:47:04,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4853 states, 4852 states have (on average 2.814921681780709) internal successors, (13658), 4852 states have internal predecessors, (13658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:04,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4853 states to 4853 states and 13658 transitions. [2021-06-04 21:47:04,155 INFO L78 Accepts]: Start accepts. Automaton has 4853 states and 13658 transitions. Word has length 150 [2021-06-04 21:47:04,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:04,155 INFO L482 AbstractCegarLoop]: Abstraction has 4853 states and 13658 transitions. [2021-06-04 21:47:04,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:04,155 INFO L276 IsEmpty]: Start isEmpty. Operand 4853 states and 13658 transitions. [2021-06-04 21:47:04,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:47:04,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:04,158 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:04,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-04 21:47:04,359 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:04,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:04,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1872481231, now seen corresponding path program 293 times [2021-06-04 21:47:04,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:04,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593198909] [2021-06-04 21:47:04,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:04,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:04,611 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:04,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:04,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593198909] [2021-06-04 21:47:04,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593198909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:04,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127486304] [2021-06-04 21:47:04,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:04,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-04 21:47:04,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:04,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:47:04,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:04,862 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:04,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127486304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:04,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:04,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-04 21:47:04,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342778548] [2021-06-04 21:47:04,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:04,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:04,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:04,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:04,863 INFO L87 Difference]: Start difference. First operand 4853 states and 13658 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:06,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:06,127 INFO L93 Difference]: Finished difference Result 6569 states and 17703 transitions. [2021-06-04 21:47:06,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-04 21:47:06,128 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-04 21:47:06,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:06,132 INFO L225 Difference]: With dead ends: 6569 [2021-06-04 21:47:06,132 INFO L226 Difference]: Without dead ends: 5946 [2021-06-04 21:47:06,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 1198.3ms TimeCoverageRelationStatistics Valid=1760, Invalid=4882, Unknown=0, NotChecked=0, Total=6642 [2021-06-04 21:47:06,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5946 states. [2021-06-04 21:47:06,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5946 to 4928. [2021-06-04 21:47:06,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.8187538055611934) internal successors, (13888), 4927 states have internal predecessors, (13888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:06,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13888 transitions. [2021-06-04 21:47:06,175 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13888 transitions. Word has length 150 [2021-06-04 21:47:06,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:06,175 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13888 transitions. [2021-06-04 21:47:06,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:06,176 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13888 transitions. [2021-06-04 21:47:06,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:47:06,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:06,179 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:06,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-04 21:47:06,380 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:06,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:06,380 INFO L82 PathProgramCache]: Analyzing trace with hash 839833629, now seen corresponding path program 294 times [2021-06-04 21:47:06,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:06,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322686386] [2021-06-04 21:47:06,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:06,627 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:06,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:06,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322686386] [2021-06-04 21:47:06,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322686386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:06,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678959344] [2021-06-04 21:47:06,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:06,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-04 21:47:06,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:06,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:47:06,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:06,876 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:06,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678959344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:06,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:06,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-04 21:47:06,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140605210] [2021-06-04 21:47:06,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:47:06,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:06,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:47:06,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:47:06,877 INFO L87 Difference]: Start difference. First operand 4928 states and 13888 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:07,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:07,847 INFO L93 Difference]: Finished difference Result 6798 states and 18421 transitions. [2021-06-04 21:47:07,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-04 21:47:07,847 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-04 21:47:07,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:07,854 INFO L225 Difference]: With dead ends: 6798 [2021-06-04 21:47:07,854 INFO L226 Difference]: Without dead ends: 6528 [2021-06-04 21:47:07,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 952.1ms TimeCoverageRelationStatistics Valid=1746, Invalid=4260, Unknown=0, NotChecked=0, Total=6006 [2021-06-04 21:47:07,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6528 states. [2021-06-04 21:47:07,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6528 to 5108. [2021-06-04 21:47:07,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5108 states, 5107 states have (on average 2.8288623457998825) internal successors, (14447), 5107 states have internal predecessors, (14447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:07,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5108 states to 5108 states and 14447 transitions. [2021-06-04 21:47:07,908 INFO L78 Accepts]: Start accepts. Automaton has 5108 states and 14447 transitions. Word has length 150 [2021-06-04 21:47:07,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:07,908 INFO L482 AbstractCegarLoop]: Abstraction has 5108 states and 14447 transitions. [2021-06-04 21:47:07,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:07,908 INFO L276 IsEmpty]: Start isEmpty. Operand 5108 states and 14447 transitions. [2021-06-04 21:47:07,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:47:07,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:07,913 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:08,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-04 21:47:08,113 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:08,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:08,114 INFO L82 PathProgramCache]: Analyzing trace with hash 862176879, now seen corresponding path program 295 times [2021-06-04 21:47:08,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:08,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150280044] [2021-06-04 21:47:08,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:08,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:08,360 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:08,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:08,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150280044] [2021-06-04 21:47:08,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150280044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:08,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468919172] [2021-06-04 21:47:08,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:08,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:47:08,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:08,637 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:08,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468919172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:08,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:08,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-04 21:47:08,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090190838] [2021-06-04 21:47:08,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:08,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:08,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:08,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:08,638 INFO L87 Difference]: Start difference. First operand 5108 states and 14447 transitions. Second operand has 31 states, 31 states have (on average 4.935483870967742) internal successors, (153), 31 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:09,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:09,936 INFO L93 Difference]: Finished difference Result 6621 states and 17921 transitions. [2021-06-04 21:47:09,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-04 21:47:09,937 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.935483870967742) internal successors, (153), 31 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-04 21:47:09,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:09,942 INFO L225 Difference]: With dead ends: 6621 [2021-06-04 21:47:09,942 INFO L226 Difference]: Without dead ends: 6046 [2021-06-04 21:47:09,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1970 ImplicationChecksByTransitivity, 1280.4ms TimeCoverageRelationStatistics Valid=1989, Invalid=5321, Unknown=0, NotChecked=0, Total=7310 [2021-06-04 21:47:09,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6046 states. [2021-06-04 21:47:09,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6046 to 3403. [2021-06-04 21:47:09,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3403 states, 3402 states have (on average 2.7389770723104054) internal successors, (9318), 3402 states have internal predecessors, (9318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:09,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3403 states to 3403 states and 9318 transitions. [2021-06-04 21:47:09,980 INFO L78 Accepts]: Start accepts. Automaton has 3403 states and 9318 transitions. Word has length 150 [2021-06-04 21:47:09,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:09,980 INFO L482 AbstractCegarLoop]: Abstraction has 3403 states and 9318 transitions. [2021-06-04 21:47:09,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.935483870967742) internal successors, (153), 31 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:09,980 INFO L276 IsEmpty]: Start isEmpty. Operand 3403 states and 9318 transitions. [2021-06-04 21:47:09,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:09,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:09,983 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:10,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:10,183 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:10,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:10,184 INFO L82 PathProgramCache]: Analyzing trace with hash -652298224, now seen corresponding path program 296 times [2021-06-04 21:47:10,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:10,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617530527] [2021-06-04 21:47:10,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:10,524 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:10,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:10,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617530527] [2021-06-04 21:47:10,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617530527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:10,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472736726] [2021-06-04 21:47:10,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:10,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:47:10,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:10,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:10,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:10,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472736726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:10,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:10,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-04 21:47:10,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680834880] [2021-06-04 21:47:10,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:10,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:10,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:10,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:10,783 INFO L87 Difference]: Start difference. First operand 3403 states and 9318 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:11,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:11,345 INFO L93 Difference]: Finished difference Result 5021 states and 12757 transitions. [2021-06-04 21:47:11,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:47:11,346 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-04 21:47:11,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:11,350 INFO L225 Difference]: With dead ends: 5021 [2021-06-04 21:47:11,350 INFO L226 Difference]: Without dead ends: 4751 [2021-06-04 21:47:11,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 710.2ms TimeCoverageRelationStatistics Valid=935, Invalid=2605, Unknown=0, NotChecked=0, Total=3540 [2021-06-04 21:47:11,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4751 states. [2021-06-04 21:47:11,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4751 to 3478. [2021-06-04 21:47:11,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3478 states, 3477 states have (on average 2.7446074201898187) internal successors, (9543), 3477 states have internal predecessors, (9543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:11,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3478 states to 3478 states and 9543 transitions. [2021-06-04 21:47:11,392 INFO L78 Accepts]: Start accepts. Automaton has 3478 states and 9543 transitions. Word has length 155 [2021-06-04 21:47:11,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:11,392 INFO L482 AbstractCegarLoop]: Abstraction has 3478 states and 9543 transitions. [2021-06-04 21:47:11,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:11,392 INFO L276 IsEmpty]: Start isEmpty. Operand 3478 states and 9543 transitions. [2021-06-04 21:47:11,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:11,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:11,395 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:11,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-06-04 21:47:11,596 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:11,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:11,596 INFO L82 PathProgramCache]: Analyzing trace with hash 814385888, now seen corresponding path program 297 times [2021-06-04 21:47:11,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:11,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842827421] [2021-06-04 21:47:11,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:11,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:11,945 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:11,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:11,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842827421] [2021-06-04 21:47:11,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842827421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:11,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192399921] [2021-06-04 21:47:11,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:12,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-04 21:47:12,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:12,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:12,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:12,224 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:12,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192399921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:12,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:12,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-04 21:47:12,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070643799] [2021-06-04 21:47:12,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:12,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:12,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:12,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:12,226 INFO L87 Difference]: Start difference. First operand 3478 states and 9543 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:12,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:12,845 INFO L93 Difference]: Finished difference Result 5641 states and 14072 transitions. [2021-06-04 21:47:12,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:47:12,846 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-04 21:47:12,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:12,851 INFO L225 Difference]: With dead ends: 5641 [2021-06-04 21:47:12,851 INFO L226 Difference]: Without dead ends: 5371 [2021-06-04 21:47:12,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 785.0ms TimeCoverageRelationStatistics Valid=997, Invalid=2909, Unknown=0, NotChecked=0, Total=3906 [2021-06-04 21:47:12,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5371 states. [2021-06-04 21:47:12,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5371 to 3553. [2021-06-04 21:47:12,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3553 states, 3552 states have (on average 2.75) internal successors, (9768), 3552 states have internal predecessors, (9768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:12,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3553 states to 3553 states and 9768 transitions. [2021-06-04 21:47:12,887 INFO L78 Accepts]: Start accepts. Automaton has 3553 states and 9768 transitions. Word has length 155 [2021-06-04 21:47:12,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:12,887 INFO L482 AbstractCegarLoop]: Abstraction has 3553 states and 9768 transitions. [2021-06-04 21:47:12,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:12,887 INFO L276 IsEmpty]: Start isEmpty. Operand 3553 states and 9768 transitions. [2021-06-04 21:47:12,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:12,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:12,890 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:13,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:13,090 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:13,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:13,091 INFO L82 PathProgramCache]: Analyzing trace with hash 679164494, now seen corresponding path program 298 times [2021-06-04 21:47:13,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:13,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091822536] [2021-06-04 21:47:13,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:13,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:13,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:13,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091822536] [2021-06-04 21:47:13,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091822536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:13,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390444777] [2021-06-04 21:47:13,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:13,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:47:13,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:13,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:13,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:13,651 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:13,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390444777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:13,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:13,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-04 21:47:13,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049652807] [2021-06-04 21:47:13,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:13,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:13,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:13,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:13,652 INFO L87 Difference]: Start difference. First operand 3553 states and 9768 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:14,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:14,283 INFO L93 Difference]: Finished difference Result 5671 states and 14207 transitions. [2021-06-04 21:47:14,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:47:14,284 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-04 21:47:14,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:14,288 INFO L225 Difference]: With dead ends: 5671 [2021-06-04 21:47:14,289 INFO L226 Difference]: Without dead ends: 5401 [2021-06-04 21:47:14,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 745.6ms TimeCoverageRelationStatistics Valid=991, Invalid=2915, Unknown=0, NotChecked=0, Total=3906 [2021-06-04 21:47:14,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2021-06-04 21:47:14,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 3628. [2021-06-04 21:47:14,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3628 states, 3627 states have (on average 2.7551695616211744) internal successors, (9993), 3627 states have internal predecessors, (9993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:14,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 9993 transitions. [2021-06-04 21:47:14,342 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 9993 transitions. Word has length 155 [2021-06-04 21:47:14,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:14,342 INFO L482 AbstractCegarLoop]: Abstraction has 3628 states and 9993 transitions. [2021-06-04 21:47:14,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:14,342 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 9993 transitions. [2021-06-04 21:47:14,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:14,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:14,345 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:14,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:14,545 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:14,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:14,546 INFO L82 PathProgramCache]: Analyzing trace with hash -197570274, now seen corresponding path program 299 times [2021-06-04 21:47:14,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:14,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411036284] [2021-06-04 21:47:14,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:14,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:14,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411036284] [2021-06-04 21:47:14,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411036284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:14,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861619976] [2021-06-04 21:47:14,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:14,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-04 21:47:14,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:14,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:14,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:15,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861619976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:15,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:15,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-04 21:47:15,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365913962] [2021-06-04 21:47:15,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:15,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:15,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:15,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:15,153 INFO L87 Difference]: Start difference. First operand 3628 states and 9993 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:15,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:15,845 INFO L93 Difference]: Finished difference Result 5696 states and 14332 transitions. [2021-06-04 21:47:15,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:47:15,845 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-04 21:47:15,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:15,850 INFO L225 Difference]: With dead ends: 5696 [2021-06-04 21:47:15,850 INFO L226 Difference]: Without dead ends: 5426 [2021-06-04 21:47:15,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 799.1ms TimeCoverageRelationStatistics Valid=1013, Invalid=3147, Unknown=0, NotChecked=0, Total=4160 [2021-06-04 21:47:15,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-06-04 21:47:15,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 3703. [2021-06-04 21:47:15,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3703 states, 3702 states have (on average 2.760129659643436) internal successors, (10218), 3702 states have internal predecessors, (10218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:15,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3703 states to 3703 states and 10218 transitions. [2021-06-04 21:47:15,888 INFO L78 Accepts]: Start accepts. Automaton has 3703 states and 10218 transitions. Word has length 155 [2021-06-04 21:47:15,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:15,888 INFO L482 AbstractCegarLoop]: Abstraction has 3703 states and 10218 transitions. [2021-06-04 21:47:15,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:15,888 INFO L276 IsEmpty]: Start isEmpty. Operand 3703 states and 10218 transitions. [2021-06-04 21:47:15,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:15,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:15,891 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:16,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:16,092 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:16,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:16,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1934896628, now seen corresponding path program 300 times [2021-06-04 21:47:16,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:16,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632049551] [2021-06-04 21:47:16,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:16,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:16,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:16,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632049551] [2021-06-04 21:47:16,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632049551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:16,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315830348] [2021-06-04 21:47:16,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:16,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-04 21:47:16,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:16,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:16,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:16,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315830348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:16,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:16,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-04 21:47:16,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002587674] [2021-06-04 21:47:16,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:16,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:16,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:16,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:16,651 INFO L87 Difference]: Start difference. First operand 3703 states and 10218 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:17,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:17,335 INFO L93 Difference]: Finished difference Result 5721 states and 14457 transitions. [2021-06-04 21:47:17,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:47:17,336 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-04 21:47:17,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:17,340 INFO L225 Difference]: With dead ends: 5721 [2021-06-04 21:47:17,340 INFO L226 Difference]: Without dead ends: 5451 [2021-06-04 21:47:17,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 761.4ms TimeCoverageRelationStatistics Valid=1021, Invalid=3139, Unknown=0, NotChecked=0, Total=4160 [2021-06-04 21:47:17,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5451 states. [2021-06-04 21:47:17,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5451 to 3778. [2021-06-04 21:47:17,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3778 states, 3777 states have (on average 2.7648927720413026) internal successors, (10443), 3777 states have internal predecessors, (10443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:17,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3778 states to 3778 states and 10443 transitions. [2021-06-04 21:47:17,377 INFO L78 Accepts]: Start accepts. Automaton has 3778 states and 10443 transitions. Word has length 155 [2021-06-04 21:47:17,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:17,377 INFO L482 AbstractCegarLoop]: Abstraction has 3778 states and 10443 transitions. [2021-06-04 21:47:17,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:17,377 INFO L276 IsEmpty]: Start isEmpty. Operand 3778 states and 10443 transitions. [2021-06-04 21:47:17,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:17,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:17,380 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:17,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-06-04 21:47:17,580 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:17,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:17,581 INFO L82 PathProgramCache]: Analyzing trace with hash -570348324, now seen corresponding path program 301 times [2021-06-04 21:47:17,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:17,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597913237] [2021-06-04 21:47:17,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:17,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:17,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:17,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597913237] [2021-06-04 21:47:17,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597913237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:17,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111223235] [2021-06-04 21:47:17,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:17,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:17,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:18,148 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:18,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111223235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:18,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:18,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-04 21:47:18,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154006632] [2021-06-04 21:47:18,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:18,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:18,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:18,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:18,149 INFO L87 Difference]: Start difference. First operand 3778 states and 10443 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:18,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:18,903 INFO L93 Difference]: Finished difference Result 5746 states and 14582 transitions. [2021-06-04 21:47:18,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:47:18,904 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-04 21:47:18,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:18,909 INFO L225 Difference]: With dead ends: 5746 [2021-06-04 21:47:18,909 INFO L226 Difference]: Without dead ends: 5476 [2021-06-04 21:47:18,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 834.4ms TimeCoverageRelationStatistics Valid=1045, Invalid=3377, Unknown=0, NotChecked=0, Total=4422 [2021-06-04 21:47:18,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5476 states. [2021-06-04 21:47:18,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5476 to 3853. [2021-06-04 21:47:18,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3853 states, 3852 states have (on average 2.769470404984424) internal successors, (10668), 3852 states have internal predecessors, (10668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:18,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3853 states to 3853 states and 10668 transitions. [2021-06-04 21:47:18,949 INFO L78 Accepts]: Start accepts. Automaton has 3853 states and 10668 transitions. Word has length 155 [2021-06-04 21:47:18,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:18,949 INFO L482 AbstractCegarLoop]: Abstraction has 3853 states and 10668 transitions. [2021-06-04 21:47:18,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:18,949 INFO L276 IsEmpty]: Start isEmpty. Operand 3853 states and 10668 transitions. [2021-06-04 21:47:18,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:18,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:18,952 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:19,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-06-04 21:47:19,153 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:19,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:19,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1447386954, now seen corresponding path program 302 times [2021-06-04 21:47:19,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:19,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087511761] [2021-06-04 21:47:19,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:19,442 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:19,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:19,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087511761] [2021-06-04 21:47:19,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087511761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:19,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110245588] [2021-06-04 21:47:19,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:19,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:47:19,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:19,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:19,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:19,706 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:19,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110245588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:19,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:19,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-04 21:47:19,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864605949] [2021-06-04 21:47:19,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:19,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:19,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:19,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:19,707 INFO L87 Difference]: Start difference. First operand 3853 states and 10668 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:20,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:20,415 INFO L93 Difference]: Finished difference Result 5771 states and 14707 transitions. [2021-06-04 21:47:20,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:47:20,416 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-04 21:47:20,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:20,421 INFO L225 Difference]: With dead ends: 5771 [2021-06-04 21:47:20,421 INFO L226 Difference]: Without dead ends: 5501 [2021-06-04 21:47:20,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 764.0ms TimeCoverageRelationStatistics Valid=1067, Invalid=3355, Unknown=0, NotChecked=0, Total=4422 [2021-06-04 21:47:20,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5501 states. [2021-06-04 21:47:20,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5501 to 3928. [2021-06-04 21:47:20,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3927 states have (on average 2.7738731856378913) internal successors, (10893), 3927 states have internal predecessors, (10893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:20,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 10893 transitions. [2021-06-04 21:47:20,462 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 10893 transitions. Word has length 155 [2021-06-04 21:47:20,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:20,463 INFO L482 AbstractCegarLoop]: Abstraction has 3928 states and 10893 transitions. [2021-06-04 21:47:20,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:20,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 10893 transitions. [2021-06-04 21:47:20,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:20,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:20,466 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:20,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-06-04 21:47:20,666 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:20,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:20,666 INFO L82 PathProgramCache]: Analyzing trace with hash 548863514, now seen corresponding path program 303 times [2021-06-04 21:47:20,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:20,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751099413] [2021-06-04 21:47:20,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:20,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:21,021 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:21,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:21,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751099413] [2021-06-04 21:47:21,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751099413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:21,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638924268] [2021-06-04 21:47:21,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:21,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-04 21:47:21,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:21,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:21,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:21,301 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:21,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638924268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:21,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:21,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-04 21:47:21,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909698988] [2021-06-04 21:47:21,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:21,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:21,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:21,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:21,302 INFO L87 Difference]: Start difference. First operand 3928 states and 10893 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:22,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:22,153 INFO L93 Difference]: Finished difference Result 5796 states and 14832 transitions. [2021-06-04 21:47:22,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:47:22,154 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-04 21:47:22,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:22,159 INFO L225 Difference]: With dead ends: 5796 [2021-06-04 21:47:22,160 INFO L226 Difference]: Without dead ends: 5526 [2021-06-04 21:47:22,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 955.3ms TimeCoverageRelationStatistics Valid=1093, Invalid=3599, Unknown=0, NotChecked=0, Total=4692 [2021-06-04 21:47:22,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5526 states. [2021-06-04 21:47:22,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5526 to 4003. [2021-06-04 21:47:22,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.7781109445277363) internal successors, (11118), 4002 states have internal predecessors, (11118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:22,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11118 transitions. [2021-06-04 21:47:22,205 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11118 transitions. Word has length 155 [2021-06-04 21:47:22,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:22,205 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11118 transitions. [2021-06-04 21:47:22,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:22,205 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11118 transitions. [2021-06-04 21:47:22,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:22,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:22,208 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:22,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-06-04 21:47:22,409 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:22,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:22,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1066089976, now seen corresponding path program 304 times [2021-06-04 21:47:22,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:22,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912751901] [2021-06-04 21:47:22,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:22,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:22,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912751901] [2021-06-04 21:47:22,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912751901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:22,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889989120] [2021-06-04 21:47:22,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:22,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:47:22,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:22,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:22,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:22,975 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:22,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889989120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:22,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:22,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-04 21:47:22,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583377230] [2021-06-04 21:47:22,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:22,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:22,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:22,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:22,976 INFO L87 Difference]: Start difference. First operand 4003 states and 11118 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:23,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:23,714 INFO L93 Difference]: Finished difference Result 5821 states and 14957 transitions. [2021-06-04 21:47:23,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:47:23,714 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-04 21:47:23,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:23,720 INFO L225 Difference]: With dead ends: 5821 [2021-06-04 21:47:23,720 INFO L226 Difference]: Without dead ends: 5551 [2021-06-04 21:47:23,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 796.3ms TimeCoverageRelationStatistics Valid=1129, Invalid=3563, Unknown=0, NotChecked=0, Total=4692 [2021-06-04 21:47:23,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5551 states. [2021-06-04 21:47:23,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5551 to 4078. [2021-06-04 21:47:23,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4078 states, 4077 states have (on average 2.7821927888153053) internal successors, (11343), 4077 states have internal predecessors, (11343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:23,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4078 states to 4078 states and 11343 transitions. [2021-06-04 21:47:23,768 INFO L78 Accepts]: Start accepts. Automaton has 4078 states and 11343 transitions. Word has length 155 [2021-06-04 21:47:23,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:23,768 INFO L482 AbstractCegarLoop]: Abstraction has 4078 states and 11343 transitions. [2021-06-04 21:47:23,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:23,768 INFO L276 IsEmpty]: Start isEmpty. Operand 4078 states and 11343 transitions. [2021-06-04 21:47:23,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:23,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:23,772 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:23,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-04 21:47:23,972 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:23,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:23,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1446533928, now seen corresponding path program 305 times [2021-06-04 21:47:23,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:23,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989797766] [2021-06-04 21:47:23,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:24,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:24,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989797766] [2021-06-04 21:47:24,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989797766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:24,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685524953] [2021-06-04 21:47:24,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:24,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-04 21:47:24,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:24,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:24,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:24,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685524953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:24,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:24,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-04 21:47:24,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609250842] [2021-06-04 21:47:24,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:24,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:24,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:24,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:24,544 INFO L87 Difference]: Start difference. First operand 4078 states and 11343 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:25,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:25,430 INFO L93 Difference]: Finished difference Result 5846 states and 15082 transitions. [2021-06-04 21:47:25,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:47:25,430 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-04 21:47:25,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:25,435 INFO L225 Difference]: With dead ends: 5846 [2021-06-04 21:47:25,435 INFO L226 Difference]: Without dead ends: 5576 [2021-06-04 21:47:25,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 932.0ms TimeCoverageRelationStatistics Valid=1157, Invalid=3813, Unknown=0, NotChecked=0, Total=4970 [2021-06-04 21:47:25,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5576 states. [2021-06-04 21:47:25,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5576 to 4153. [2021-06-04 21:47:25,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4153 states, 4152 states have (on average 2.786127167630058) internal successors, (11568), 4152 states have internal predecessors, (11568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:25,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4153 states to 4153 states and 11568 transitions. [2021-06-04 21:47:25,501 INFO L78 Accepts]: Start accepts. Automaton has 4153 states and 11568 transitions. Word has length 155 [2021-06-04 21:47:25,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:25,501 INFO L482 AbstractCegarLoop]: Abstraction has 4153 states and 11568 transitions. [2021-06-04 21:47:25,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:25,501 INFO L276 IsEmpty]: Start isEmpty. Operand 4153 states and 11568 transitions. [2021-06-04 21:47:25,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:25,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:25,504 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:25,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-06-04 21:47:25,704 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:25,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:25,705 INFO L82 PathProgramCache]: Analyzing trace with hash -822158778, now seen corresponding path program 306 times [2021-06-04 21:47:25,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:25,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548015323] [2021-06-04 21:47:25,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:25,977 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:25,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:25,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548015323] [2021-06-04 21:47:25,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548015323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:25,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702090525] [2021-06-04 21:47:25,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:26,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-04 21:47:26,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:26,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:26,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:26,239 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:26,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702090525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:26,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:26,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-04 21:47:26,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988781867] [2021-06-04 21:47:26,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:26,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:26,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:26,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:26,240 INFO L87 Difference]: Start difference. First operand 4153 states and 11568 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:27,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:27,059 INFO L93 Difference]: Finished difference Result 5871 states and 15207 transitions. [2021-06-04 21:47:27,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:47:27,059 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-04 21:47:27,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:27,066 INFO L225 Difference]: With dead ends: 5871 [2021-06-04 21:47:27,066 INFO L226 Difference]: Without dead ends: 5601 [2021-06-04 21:47:27,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 832.8ms TimeCoverageRelationStatistics Valid=1207, Invalid=3763, Unknown=0, NotChecked=0, Total=4970 [2021-06-04 21:47:27,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5601 states. [2021-06-04 21:47:27,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5601 to 4228. [2021-06-04 21:47:27,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.7899219304471257) internal successors, (11793), 4227 states have internal predecessors, (11793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:27,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11793 transitions. [2021-06-04 21:47:27,117 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11793 transitions. Word has length 155 [2021-06-04 21:47:27,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:27,117 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11793 transitions. [2021-06-04 21:47:27,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:27,118 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11793 transitions. [2021-06-04 21:47:27,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:27,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:27,121 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:27,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-06-04 21:47:27,322 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:27,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:27,322 INFO L82 PathProgramCache]: Analyzing trace with hash -13106922, now seen corresponding path program 307 times [2021-06-04 21:47:27,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:27,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631110201] [2021-06-04 21:47:27,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:27,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:27,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631110201] [2021-06-04 21:47:27,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631110201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:27,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374681769] [2021-06-04 21:47:27,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:27,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:27,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:27,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:27,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374681769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:27,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:27,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-04 21:47:27,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002481066] [2021-06-04 21:47:27,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:27,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:27,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:27,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:27,926 INFO L87 Difference]: Start difference. First operand 4228 states and 11793 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:28,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:28,922 INFO L93 Difference]: Finished difference Result 5896 states and 15332 transitions. [2021-06-04 21:47:28,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-04 21:47:28,922 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-04 21:47:28,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:28,928 INFO L225 Difference]: With dead ends: 5896 [2021-06-04 21:47:28,928 INFO L226 Difference]: Without dead ends: 5626 [2021-06-04 21:47:28,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 1023.8ms TimeCoverageRelationStatistics Valid=1237, Invalid=4019, Unknown=0, NotChecked=0, Total=5256 [2021-06-04 21:47:28,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5626 states. [2021-06-04 21:47:28,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5626 to 4303. [2021-06-04 21:47:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4303 states, 4302 states have (on average 2.793584379358438) internal successors, (12018), 4302 states have internal predecessors, (12018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:28,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4303 states to 4303 states and 12018 transitions. [2021-06-04 21:47:28,981 INFO L78 Accepts]: Start accepts. Automaton has 4303 states and 12018 transitions. Word has length 155 [2021-06-04 21:47:28,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:28,981 INFO L482 AbstractCegarLoop]: Abstraction has 4303 states and 12018 transitions. [2021-06-04 21:47:28,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:28,981 INFO L276 IsEmpty]: Start isEmpty. Operand 4303 states and 12018 transitions. [2021-06-04 21:47:28,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:28,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:28,985 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:29,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:29,185 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:29,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:29,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1405057020, now seen corresponding path program 308 times [2021-06-04 21:47:29,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:29,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550377368] [2021-06-04 21:47:29,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:29,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:29,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550377368] [2021-06-04 21:47:29,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550377368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:29,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079850143] [2021-06-04 21:47:29,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:29,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:47:29,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:29,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:29,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:29,707 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:29,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079850143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:29,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:29,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-04 21:47:29,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153579177] [2021-06-04 21:47:29,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:29,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:29,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:29,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:29,708 INFO L87 Difference]: Start difference. First operand 4303 states and 12018 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:30,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:30,545 INFO L93 Difference]: Finished difference Result 5921 states and 15457 transitions. [2021-06-04 21:47:30,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-04 21:47:30,545 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-04 21:47:30,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:30,552 INFO L225 Difference]: With dead ends: 5921 [2021-06-04 21:47:30,552 INFO L226 Difference]: Without dead ends: 5651 [2021-06-04 21:47:30,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 852.6ms TimeCoverageRelationStatistics Valid=1301, Invalid=3955, Unknown=0, NotChecked=0, Total=5256 [2021-06-04 21:47:30,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5651 states. [2021-06-04 21:47:30,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5651 to 4378. [2021-06-04 21:47:30,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4378 states, 4377 states have (on average 2.7971213159698425) internal successors, (12243), 4377 states have internal predecessors, (12243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:30,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4378 states to 4378 states and 12243 transitions. [2021-06-04 21:47:30,613 INFO L78 Accepts]: Start accepts. Automaton has 4378 states and 12243 transitions. Word has length 155 [2021-06-04 21:47:30,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:30,613 INFO L482 AbstractCegarLoop]: Abstraction has 4378 states and 12243 transitions. [2021-06-04 21:47:30,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:30,613 INFO L276 IsEmpty]: Start isEmpty. Operand 4378 states and 12243 transitions. [2021-06-04 21:47:30,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:30,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:30,617 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:30,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-06-04 21:47:30,818 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:30,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:30,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1650134316, now seen corresponding path program 309 times [2021-06-04 21:47:30,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:30,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818468772] [2021-06-04 21:47:30,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:31,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:31,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818468772] [2021-06-04 21:47:31,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818468772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:31,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691614274] [2021-06-04 21:47:31,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:31,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-04 21:47:31,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:31,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:31,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:31,399 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:31,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691614274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:31,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:31,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-04 21:47:31,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520876764] [2021-06-04 21:47:31,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:31,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:31,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:31,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:31,400 INFO L87 Difference]: Start difference. First operand 4378 states and 12243 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:32,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:32,408 INFO L93 Difference]: Finished difference Result 5946 states and 15582 transitions. [2021-06-04 21:47:32,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:47:32,408 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-04 21:47:32,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:32,414 INFO L225 Difference]: With dead ends: 5946 [2021-06-04 21:47:32,415 INFO L226 Difference]: Without dead ends: 5676 [2021-06-04 21:47:32,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 1013.4ms TimeCoverageRelationStatistics Valid=1333, Invalid=4217, Unknown=0, NotChecked=0, Total=5550 [2021-06-04 21:47:32,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5676 states. [2021-06-04 21:47:32,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5676 to 4453. [2021-06-04 21:47:32,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4453 states, 4452 states have (on average 2.8005390835579513) internal successors, (12468), 4452 states have internal predecessors, (12468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:32,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4453 states to 4453 states and 12468 transitions. [2021-06-04 21:47:32,473 INFO L78 Accepts]: Start accepts. Automaton has 4453 states and 12468 transitions. Word has length 155 [2021-06-04 21:47:32,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:32,473 INFO L482 AbstractCegarLoop]: Abstraction has 4453 states and 12468 transitions. [2021-06-04 21:47:32,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:32,474 INFO L276 IsEmpty]: Start isEmpty. Operand 4453 states and 12468 transitions. [2021-06-04 21:47:32,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:32,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:32,477 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:32,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:32,678 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:32,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:32,678 INFO L82 PathProgramCache]: Analyzing trace with hash -2026984638, now seen corresponding path program 310 times [2021-06-04 21:47:32,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:32,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361950701] [2021-06-04 21:47:32,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:32,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:32,945 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:32,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:32,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361950701] [2021-06-04 21:47:32,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361950701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:32,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799131552] [2021-06-04 21:47:32,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:33,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:47:33,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:33,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:33,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:33,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799131552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:33,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:33,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-04 21:47:33,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096001065] [2021-06-04 21:47:33,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:33,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:33,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:33,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:33,196 INFO L87 Difference]: Start difference. First operand 4453 states and 12468 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:34,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:34,156 INFO L93 Difference]: Finished difference Result 5971 states and 15707 transitions. [2021-06-04 21:47:34,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-04 21:47:34,157 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-04 21:47:34,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:34,161 INFO L225 Difference]: With dead ends: 5971 [2021-06-04 21:47:34,161 INFO L226 Difference]: Without dead ends: 5701 [2021-06-04 21:47:34,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 906.9ms TimeCoverageRelationStatistics Valid=1411, Invalid=4139, Unknown=0, NotChecked=0, Total=5550 [2021-06-04 21:47:34,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5701 states. [2021-06-04 21:47:34,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5701 to 4528. [2021-06-04 21:47:34,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4528 states, 4527 states have (on average 2.803843605036448) internal successors, (12693), 4527 states have internal predecessors, (12693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:34,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4528 states to 4528 states and 12693 transitions. [2021-06-04 21:47:34,211 INFO L78 Accepts]: Start accepts. Automaton has 4528 states and 12693 transitions. Word has length 155 [2021-06-04 21:47:34,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:34,211 INFO L482 AbstractCegarLoop]: Abstraction has 4528 states and 12693 transitions. [2021-06-04 21:47:34,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:34,211 INFO L276 IsEmpty]: Start isEmpty. Operand 4528 states and 12693 transitions. [2021-06-04 21:47:34,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:34,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:34,215 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:34,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable318 [2021-06-04 21:47:34,416 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:34,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:34,416 INFO L82 PathProgramCache]: Analyzing trace with hash -700229102, now seen corresponding path program 311 times [2021-06-04 21:47:34,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:34,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028622551] [2021-06-04 21:47:34,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:34,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:34,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028622551] [2021-06-04 21:47:34,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028622551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:34,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008213371] [2021-06-04 21:47:34,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:34,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-04 21:47:34,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:34,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:34,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:34,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008213371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:34,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:34,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-04 21:47:34,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554800096] [2021-06-04 21:47:34,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:34,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:34,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:34,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:34,974 INFO L87 Difference]: Start difference. First operand 4528 states and 12693 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:36,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:36,073 INFO L93 Difference]: Finished difference Result 5996 states and 15832 transitions. [2021-06-04 21:47:36,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-04 21:47:36,074 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-04 21:47:36,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:36,080 INFO L225 Difference]: With dead ends: 5996 [2021-06-04 21:47:36,080 INFO L226 Difference]: Without dead ends: 5726 [2021-06-04 21:47:36,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 1075.7ms TimeCoverageRelationStatistics Valid=1445, Invalid=4407, Unknown=0, NotChecked=0, Total=5852 [2021-06-04 21:47:36,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5726 states. [2021-06-04 21:47:36,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5726 to 4603. [2021-06-04 21:47:36,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4603 states, 4602 states have (on average 2.8070404172099086) internal successors, (12918), 4602 states have internal predecessors, (12918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:36,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4603 states to 4603 states and 12918 transitions. [2021-06-04 21:47:36,138 INFO L78 Accepts]: Start accepts. Automaton has 4603 states and 12918 transitions. Word has length 155 [2021-06-04 21:47:36,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:36,138 INFO L482 AbstractCegarLoop]: Abstraction has 4603 states and 12918 transitions. [2021-06-04 21:47:36,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:36,138 INFO L276 IsEmpty]: Start isEmpty. Operand 4603 states and 12918 transitions. [2021-06-04 21:47:36,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:36,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:36,142 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:36,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:36,342 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:36,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:36,343 INFO L82 PathProgramCache]: Analyzing trace with hash -246012928, now seen corresponding path program 312 times [2021-06-04 21:47:36,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:36,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567382022] [2021-06-04 21:47:36,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:36,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:36,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567382022] [2021-06-04 21:47:36,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567382022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:36,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59147148] [2021-06-04 21:47:36,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:36,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-04 21:47:36,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:36,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:36,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:36,877 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:36,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59147148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:36,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:36,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-04 21:47:36,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79932605] [2021-06-04 21:47:36,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:36,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:36,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:36,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:36,878 INFO L87 Difference]: Start difference. First operand 4603 states and 12918 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:37,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:37,866 INFO L93 Difference]: Finished difference Result 6021 states and 15957 transitions. [2021-06-04 21:47:37,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-04 21:47:37,867 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-04 21:47:37,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:37,873 INFO L225 Difference]: With dead ends: 6021 [2021-06-04 21:47:37,873 INFO L226 Difference]: Without dead ends: 5751 [2021-06-04 21:47:37,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 946.9ms TimeCoverageRelationStatistics Valid=1537, Invalid=4315, Unknown=0, NotChecked=0, Total=5852 [2021-06-04 21:47:37,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5751 states. [2021-06-04 21:47:37,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5751 to 4678. [2021-06-04 21:47:37,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4678 states, 4677 states have (on average 2.8101347017318794) internal successors, (13143), 4677 states have internal predecessors, (13143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:37,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4678 states to 4678 states and 13143 transitions. [2021-06-04 21:47:37,934 INFO L78 Accepts]: Start accepts. Automaton has 4678 states and 13143 transitions. Word has length 155 [2021-06-04 21:47:37,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:37,934 INFO L482 AbstractCegarLoop]: Abstraction has 4678 states and 13143 transitions. [2021-06-04 21:47:37,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:37,934 INFO L276 IsEmpty]: Start isEmpty. Operand 4678 states and 13143 transitions. [2021-06-04 21:47:37,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:37,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:37,938 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:38,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:38,139 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:38,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:38,139 INFO L82 PathProgramCache]: Analyzing trace with hash 752883408, now seen corresponding path program 313 times [2021-06-04 21:47:38,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:38,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804042785] [2021-06-04 21:47:38,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:38,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:38,410 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:38,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:38,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804042785] [2021-06-04 21:47:38,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804042785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:38,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11510076] [2021-06-04 21:47:38,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:38,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:38,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:38,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:38,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11510076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:38,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:38,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-04 21:47:38,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272225098] [2021-06-04 21:47:38,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:38,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:38,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:38,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:38,681 INFO L87 Difference]: Start difference. First operand 4678 states and 13143 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:39,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:39,854 INFO L93 Difference]: Finished difference Result 6046 states and 16082 transitions. [2021-06-04 21:47:39,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-04 21:47:39,854 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-04 21:47:39,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:39,860 INFO L225 Difference]: With dead ends: 6046 [2021-06-04 21:47:39,860 INFO L226 Difference]: Without dead ends: 5776 [2021-06-04 21:47:39,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 1113.0ms TimeCoverageRelationStatistics Valid=1573, Invalid=4589, Unknown=0, NotChecked=0, Total=6162 [2021-06-04 21:47:39,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5776 states. [2021-06-04 21:47:39,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5776 to 4753. [2021-06-04 21:47:39,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4753 states, 4752 states have (on average 2.813131313131313) internal successors, (13368), 4752 states have internal predecessors, (13368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:39,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4753 states to 4753 states and 13368 transitions. [2021-06-04 21:47:39,942 INFO L78 Accepts]: Start accepts. Automaton has 4753 states and 13368 transitions. Word has length 155 [2021-06-04 21:47:39,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:39,942 INFO L482 AbstractCegarLoop]: Abstraction has 4753 states and 13368 transitions. [2021-06-04 21:47:39,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:39,943 INFO L276 IsEmpty]: Start isEmpty. Operand 4753 states and 13368 transitions. [2021-06-04 21:47:39,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:39,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:39,947 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:40,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-04 21:47:40,147 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:40,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:40,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1126444482, now seen corresponding path program 314 times [2021-06-04 21:47:40,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:40,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377231149] [2021-06-04 21:47:40,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:40,424 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:40,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:40,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377231149] [2021-06-04 21:47:40,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377231149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:40,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175632210] [2021-06-04 21:47:40,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:40,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:47:40,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:40,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:40,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:40,675 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:40,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175632210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:40,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:40,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-04 21:47:40,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202927555] [2021-06-04 21:47:40,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:40,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:40,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:40,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:40,677 INFO L87 Difference]: Start difference. First operand 4753 states and 13368 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:41,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:41,719 INFO L93 Difference]: Finished difference Result 6071 states and 16207 transitions. [2021-06-04 21:47:41,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-04 21:47:41,720 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-04 21:47:41,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:41,725 INFO L225 Difference]: With dead ends: 6071 [2021-06-04 21:47:41,726 INFO L226 Difference]: Without dead ends: 5801 [2021-06-04 21:47:41,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 970.3ms TimeCoverageRelationStatistics Valid=1679, Invalid=4483, Unknown=0, NotChecked=0, Total=6162 [2021-06-04 21:47:41,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5801 states. [2021-06-04 21:47:41,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5801 to 4828. [2021-06-04 21:47:41,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4828 states, 4827 states have (on average 2.8160348042262275) internal successors, (13593), 4827 states have internal predecessors, (13593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:41,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4828 states to 4828 states and 13593 transitions. [2021-06-04 21:47:41,781 INFO L78 Accepts]: Start accepts. Automaton has 4828 states and 13593 transitions. Word has length 155 [2021-06-04 21:47:41,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:41,781 INFO L482 AbstractCegarLoop]: Abstraction has 4828 states and 13593 transitions. [2021-06-04 21:47:41,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:41,782 INFO L276 IsEmpty]: Start isEmpty. Operand 4828 states and 13593 transitions. [2021-06-04 21:47:41,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:41,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:41,785 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:41,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-04 21:47:41,986 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:41,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:41,986 INFO L82 PathProgramCache]: Analyzing trace with hash 903874830, now seen corresponding path program 315 times [2021-06-04 21:47:41,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:41,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426300652] [2021-06-04 21:47:41,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:41,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:42,255 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:42,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:42,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426300652] [2021-06-04 21:47:42,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426300652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:42,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707174666] [2021-06-04 21:47:42,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:42,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-04 21:47:42,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:42,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:42,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:42,524 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:42,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707174666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:42,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:42,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-04 21:47:42,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411934134] [2021-06-04 21:47:42,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:42,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:42,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:42,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:42,525 INFO L87 Difference]: Start difference. First operand 4828 states and 13593 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:43,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:43,765 INFO L93 Difference]: Finished difference Result 6096 states and 16332 transitions. [2021-06-04 21:47:43,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-04 21:47:43,765 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-04 21:47:43,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:43,771 INFO L225 Difference]: With dead ends: 6096 [2021-06-04 21:47:43,771 INFO L226 Difference]: Without dead ends: 5826 [2021-06-04 21:47:43,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 1168.6ms TimeCoverageRelationStatistics Valid=1717, Invalid=4763, Unknown=0, NotChecked=0, Total=6480 [2021-06-04 21:47:43,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5826 states. [2021-06-04 21:47:43,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5826 to 4903. [2021-06-04 21:47:43,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4903 states, 4902 states have (on average 2.8188494492044063) internal successors, (13818), 4902 states have internal predecessors, (13818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:43,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4903 states to 4903 states and 13818 transitions. [2021-06-04 21:47:43,831 INFO L78 Accepts]: Start accepts. Automaton has 4903 states and 13818 transitions. Word has length 155 [2021-06-04 21:47:43,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:43,831 INFO L482 AbstractCegarLoop]: Abstraction has 4903 states and 13818 transitions. [2021-06-04 21:47:43,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:43,831 INFO L276 IsEmpty]: Start isEmpty. Operand 4903 states and 13818 transitions. [2021-06-04 21:47:43,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:43,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:43,835 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:44,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-06-04 21:47:44,036 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:44,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:44,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1518114300, now seen corresponding path program 316 times [2021-06-04 21:47:44,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:44,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179413367] [2021-06-04 21:47:44,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:44,298 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:44,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:44,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179413367] [2021-06-04 21:47:44,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179413367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:44,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956494007] [2021-06-04 21:47:44,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:44,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:47:44,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:44,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:44,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:44,542 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:44,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956494007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:44,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:44,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-04 21:47:44,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306418672] [2021-06-04 21:47:44,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:44,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:44,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:44,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:44,544 INFO L87 Difference]: Start difference. First operand 4903 states and 13818 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:45,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:45,620 INFO L93 Difference]: Finished difference Result 6166 states and 16577 transitions. [2021-06-04 21:47:45,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-04 21:47:45,620 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-04 21:47:45,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:45,624 INFO L225 Difference]: With dead ends: 6166 [2021-06-04 21:47:45,624 INFO L226 Difference]: Without dead ends: 5896 [2021-06-04 21:47:45,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 1008.0ms TimeCoverageRelationStatistics Valid=1837, Invalid=4643, Unknown=0, NotChecked=0, Total=6480 [2021-06-04 21:47:45,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5896 states. [2021-06-04 21:47:45,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5896 to 4978. [2021-06-04 21:47:45,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4978 states, 4977 states have (on average 2.824593128390597) internal successors, (14058), 4977 states have internal predecessors, (14058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:45,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4978 states to 4978 states and 14058 transitions. [2021-06-04 21:47:45,682 INFO L78 Accepts]: Start accepts. Automaton has 4978 states and 14058 transitions. Word has length 155 [2021-06-04 21:47:45,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:45,682 INFO L482 AbstractCegarLoop]: Abstraction has 4978 states and 14058 transitions. [2021-06-04 21:47:45,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:45,682 INFO L276 IsEmpty]: Start isEmpty. Operand 4978 states and 14058 transitions. [2021-06-04 21:47:45,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:45,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:45,686 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:45,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-06-04 21:47:45,887 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:45,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:45,887 INFO L82 PathProgramCache]: Analyzing trace with hash -197127988, now seen corresponding path program 317 times [2021-06-04 21:47:45,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:45,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017345333] [2021-06-04 21:47:45,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:45,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:46,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:46,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017345333] [2021-06-04 21:47:46,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017345333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:46,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246097418] [2021-06-04 21:47:46,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:46,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-04 21:47:46,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:46,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:46,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:46,408 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:46,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246097418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:46,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:46,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-04 21:47:46,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218822506] [2021-06-04 21:47:46,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:46,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:46,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:46,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:46,409 INFO L87 Difference]: Start difference. First operand 4978 states and 14058 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:47,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:47,724 INFO L93 Difference]: Finished difference Result 6744 states and 18203 transitions. [2021-06-04 21:47:47,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-04 21:47:47,724 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-04 21:47:47,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:47,731 INFO L225 Difference]: With dead ends: 6744 [2021-06-04 21:47:47,731 INFO L226 Difference]: Without dead ends: 6121 [2021-06-04 21:47:47,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1979 ImplicationChecksByTransitivity, 1232.0ms TimeCoverageRelationStatistics Valid=1898, Invalid=5242, Unknown=0, NotChecked=0, Total=7140 [2021-06-04 21:47:47,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6121 states. [2021-06-04 21:47:47,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6121 to 5053. [2021-06-04 21:47:47,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5053 states, 5052 states have (on average 2.8281868566904196) internal successors, (14288), 5052 states have internal predecessors, (14288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:47,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5053 states to 5053 states and 14288 transitions. [2021-06-04 21:47:47,792 INFO L78 Accepts]: Start accepts. Automaton has 5053 states and 14288 transitions. Word has length 155 [2021-06-04 21:47:47,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:47,792 INFO L482 AbstractCegarLoop]: Abstraction has 5053 states and 14288 transitions. [2021-06-04 21:47:47,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:47,792 INFO L276 IsEmpty]: Start isEmpty. Operand 5053 states and 14288 transitions. [2021-06-04 21:47:47,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:47,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:47,796 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:47,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:47,997 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:47,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:47,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1229775590, now seen corresponding path program 318 times [2021-06-04 21:47:47,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:47,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933602365] [2021-06-04 21:47:47,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:48,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:48,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933602365] [2021-06-04 21:47:48,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933602365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:48,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286756121] [2021-06-04 21:47:48,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:48,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-04 21:47:48,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:48,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:48,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:48,546 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:48,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286756121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:48,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:48,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-04 21:47:48,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727313989] [2021-06-04 21:47:48,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:48,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:48,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:48,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:48,547 INFO L87 Difference]: Start difference. First operand 5053 states and 14288 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:49,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:49,596 INFO L93 Difference]: Finished difference Result 6948 states and 18871 transitions. [2021-06-04 21:47:49,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-04 21:47:49,597 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-04 21:47:49,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:49,603 INFO L225 Difference]: With dead ends: 6948 [2021-06-04 21:47:49,604 INFO L226 Difference]: Without dead ends: 6678 [2021-06-04 21:47:49,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 1019.9ms TimeCoverageRelationStatistics Valid=2012, Invalid=4794, Unknown=0, NotChecked=0, Total=6806 [2021-06-04 21:47:49,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6678 states. [2021-06-04 21:47:49,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6678 to 5233. [2021-06-04 21:47:49,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5233 states, 5232 states have (on average 2.8377293577981653) internal successors, (14847), 5232 states have internal predecessors, (14847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:49,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5233 states to 5233 states and 14847 transitions. [2021-06-04 21:47:49,665 INFO L78 Accepts]: Start accepts. Automaton has 5233 states and 14847 transitions. Word has length 155 [2021-06-04 21:47:49,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:49,666 INFO L482 AbstractCegarLoop]: Abstraction has 5233 states and 14847 transitions. [2021-06-04 21:47:49,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:49,666 INFO L276 IsEmpty]: Start isEmpty. Operand 5233 states and 14847 transitions. [2021-06-04 21:47:49,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:49,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:49,670 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:49,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-04 21:47:49,870 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:49,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:49,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1207432340, now seen corresponding path program 319 times [2021-06-04 21:47:49,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:49,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950494910] [2021-06-04 21:47:49,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:50,146 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:50,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:50,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950494910] [2021-06-04 21:47:50,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950494910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:50,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385458292] [2021-06-04 21:47:50,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:50,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:50,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:50,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:50,435 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:50,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385458292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:50,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:50,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-04 21:47:50,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751354345] [2021-06-04 21:47:50,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:50,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:50,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:50,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:50,436 INFO L87 Difference]: Start difference. First operand 5233 states and 14847 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:51,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:51,695 INFO L93 Difference]: Finished difference Result 6410 states and 17521 transitions. [2021-06-04 21:47:51,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-04 21:47:51,695 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-04 21:47:51,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:51,700 INFO L225 Difference]: With dead ends: 6410 [2021-06-04 21:47:51,700 INFO L226 Difference]: Without dead ends: 5921 [2021-06-04 21:47:51,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2012 ImplicationChecksByTransitivity, 1245.9ms TimeCoverageRelationStatistics Valid=2056, Invalid=5084, Unknown=0, NotChecked=0, Total=7140 [2021-06-04 21:47:51,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5921 states. [2021-06-04 21:47:51,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5921 to 5178. [2021-06-04 21:47:51,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5178 states, 5177 states have (on average 2.836198570600734) internal successors, (14683), 5177 states have internal predecessors, (14683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:51,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5178 states to 5178 states and 14683 transitions. [2021-06-04 21:47:51,754 INFO L78 Accepts]: Start accepts. Automaton has 5178 states and 14683 transitions. Word has length 155 [2021-06-04 21:47:51,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:51,754 INFO L482 AbstractCegarLoop]: Abstraction has 5178 states and 14683 transitions. [2021-06-04 21:47:51,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:51,755 INFO L276 IsEmpty]: Start isEmpty. Operand 5178 states and 14683 transitions. [2021-06-04 21:47:51,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:47:51,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:51,759 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:51,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:51,959 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:51,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:51,959 INFO L82 PathProgramCache]: Analyzing trace with hash -998997856, now seen corresponding path program 320 times [2021-06-04 21:47:51,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:51,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460649552] [2021-06-04 21:47:51,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:51,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:52,294 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:52,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:52,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460649552] [2021-06-04 21:47:52,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460649552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:52,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966628471] [2021-06-04 21:47:52,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:52,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:47:52,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:52,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:47:52,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:52,595 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:52,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966628471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:52,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:52,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 34 [2021-06-04 21:47:52,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548631513] [2021-06-04 21:47:52,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:47:52,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:52,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:47:52,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=870, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:47:52,597 INFO L87 Difference]: Start difference. First operand 5178 states and 14683 transitions. Second operand has 34 states, 34 states have (on average 5.529411764705882) internal successors, (188), 34 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:53,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:53,297 INFO L93 Difference]: Finished difference Result 6468 states and 17583 transitions. [2021-06-04 21:47:53,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:47:53,297 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.529411764705882) internal successors, (188), 34 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-04 21:47:53,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:53,304 INFO L225 Difference]: With dead ends: 6468 [2021-06-04 21:47:53,304 INFO L226 Difference]: Without dead ends: 6134 [2021-06-04 21:47:53,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 832.5ms TimeCoverageRelationStatistics Valid=1165, Invalid=3125, Unknown=0, NotChecked=0, Total=4290 [2021-06-04 21:47:53,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6134 states. [2021-06-04 21:47:53,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6134 to 5263. [2021-06-04 21:47:53,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5263 states, 5262 states have (on average 2.822690992018244) internal successors, (14853), 5262 states have internal predecessors, (14853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:53,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5263 states to 5263 states and 14853 transitions. [2021-06-04 21:47:53,368 INFO L78 Accepts]: Start accepts. Automaton has 5263 states and 14853 transitions. Word has length 160 [2021-06-04 21:47:53,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:53,369 INFO L482 AbstractCegarLoop]: Abstraction has 5263 states and 14853 transitions. [2021-06-04 21:47:53,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.529411764705882) internal successors, (188), 34 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:53,369 INFO L276 IsEmpty]: Start isEmpty. Operand 5263 states and 14853 transitions. [2021-06-04 21:47:53,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:47:53,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:53,374 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:53,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable328 [2021-06-04 21:47:53,574 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:53,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:53,575 INFO L82 PathProgramCache]: Analyzing trace with hash 595396196, now seen corresponding path program 321 times [2021-06-04 21:47:53,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:53,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228903691] [2021-06-04 21:47:53,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:53,918 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:53,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:53,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228903691] [2021-06-04 21:47:53,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228903691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:53,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16300215] [2021-06-04 21:47:53,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:53,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-04 21:47:53,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:53,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:47:54,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:54,228 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:54,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16300215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:54,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:54,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-04 21:47:54,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560159770] [2021-06-04 21:47:54,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:54,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:54,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:54,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:54,229 INFO L87 Difference]: Start difference. First operand 5263 states and 14853 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:54,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:54,801 INFO L93 Difference]: Finished difference Result 7561 states and 19577 transitions. [2021-06-04 21:47:54,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:47:54,802 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-04 21:47:54,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:54,809 INFO L225 Difference]: With dead ends: 7561 [2021-06-04 21:47:54,809 INFO L226 Difference]: Without dead ends: 7291 [2021-06-04 21:47:54,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 722.7ms TimeCoverageRelationStatistics Valid=988, Invalid=2552, Unknown=0, NotChecked=0, Total=3540 [2021-06-04 21:47:54,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7291 states. [2021-06-04 21:47:54,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7291 to 5278. [2021-06-04 21:47:54,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:54,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-04 21:47:54,872 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-04 21:47:54,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:54,872 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-04 21:47:54,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:54,872 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-04 21:47:54,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:47:54,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:54,877 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:55,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:55,077 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:55,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:55,078 INFO L82 PathProgramCache]: Analyzing trace with hash 94082356, now seen corresponding path program 322 times [2021-06-04 21:47:55,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:55,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468810365] [2021-06-04 21:47:55,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:55,434 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:55,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:55,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468810365] [2021-06-04 21:47:55,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468810365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:55,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778468492] [2021-06-04 21:47:55,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:55,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:47:55,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:55,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:47:55,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:55,718 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:55,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778468492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:55,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:55,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-04 21:47:55,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840555751] [2021-06-04 21:47:55,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:47:55,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:55,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:47:55,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=785, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:47:55,719 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:56,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:56,386 INFO L93 Difference]: Finished difference Result 7446 states and 19347 transitions. [2021-06-04 21:47:56,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:47:56,386 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-04 21:47:56,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:56,395 INFO L225 Difference]: With dead ends: 7446 [2021-06-04 21:47:56,395 INFO L226 Difference]: Without dead ends: 7176 [2021-06-04 21:47:56,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 819.7ms TimeCoverageRelationStatistics Valid=1067, Invalid=2965, Unknown=0, NotChecked=0, Total=4032 [2021-06-04 21:47:56,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7176 states. [2021-06-04 21:47:56,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7176 to 5278. [2021-06-04 21:47:56,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:56,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-04 21:47:56,461 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-04 21:47:56,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:56,461 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-04 21:47:56,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:56,461 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-04 21:47:56,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:47:56,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:56,465 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:56,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-06-04 21:47:56,666 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:56,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:56,666 INFO L82 PathProgramCache]: Analyzing trace with hash 570577698, now seen corresponding path program 323 times [2021-06-04 21:47:56,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:56,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002444401] [2021-06-04 21:47:56,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:57,030 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:57,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:57,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002444401] [2021-06-04 21:47:57,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002444401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:57,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109773714] [2021-06-04 21:47:57,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:57,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-04 21:47:57,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:57,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:47:57,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:57,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109773714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:57,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:57,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-04 21:47:57,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581237584] [2021-06-04 21:47:57,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:57,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:57,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:57,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:57,301 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:57,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:57,933 INFO L93 Difference]: Finished difference Result 7421 states and 19297 transitions. [2021-06-04 21:47:57,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:47:57,933 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-04 21:47:57,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:57,941 INFO L225 Difference]: With dead ends: 7421 [2021-06-04 21:47:57,941 INFO L226 Difference]: Without dead ends: 7151 [2021-06-04 21:47:57,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 754.8ms TimeCoverageRelationStatistics Valid=987, Invalid=2795, Unknown=0, NotChecked=0, Total=3782 [2021-06-04 21:47:57,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2021-06-04 21:47:57,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 5278. [2021-06-04 21:47:57,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:58,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-04 21:47:58,005 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-04 21:47:58,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:58,005 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-04 21:47:58,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:58,005 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-04 21:47:58,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:47:58,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:58,010 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:58,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-04 21:47:58,210 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:58,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:58,210 INFO L82 PathProgramCache]: Analyzing trace with hash 2037261810, now seen corresponding path program 324 times [2021-06-04 21:47:58,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:58,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927794179] [2021-06-04 21:47:58,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:58,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:58,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927794179] [2021-06-04 21:47:58,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927794179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:58,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953296509] [2021-06-04 21:47:58,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:58,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-04 21:47:58,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:58,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:47:58,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:58,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953296509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:58,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:58,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-04 21:47:58,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890548285] [2021-06-04 21:47:58,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:47:58,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:58,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:47:58,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:47:58,862 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:59,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:59,621 INFO L93 Difference]: Finished difference Result 7371 states and 19197 transitions. [2021-06-04 21:47:59,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:47:59,622 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-04 21:47:59,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:59,628 INFO L225 Difference]: With dead ends: 7371 [2021-06-04 21:47:59,628 INFO L226 Difference]: Without dead ends: 7101 [2021-06-04 21:47:59,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 896.6ms TimeCoverageRelationStatistics Valid=1074, Invalid=3216, Unknown=0, NotChecked=0, Total=4290 [2021-06-04 21:47:59,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7101 states. [2021-06-04 21:47:59,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7101 to 5278. [2021-06-04 21:47:59,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:59,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-04 21:47:59,686 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-04 21:47:59,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:59,686 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-04 21:47:59,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:59,686 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-04 21:47:59,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:47:59,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:59,691 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:47:59,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:59,891 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:59,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:59,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1902040416, now seen corresponding path program 325 times [2021-06-04 21:47:59,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:59,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427943519] [2021-06-04 21:47:59,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:00,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:00,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427943519] [2021-06-04 21:48:00,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427943519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:00,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048244270] [2021-06-04 21:48:00,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:00,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:00,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:00,477 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:00,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048244270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:00,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:00,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-04 21:48:00,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717253910] [2021-06-04 21:48:00,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:48:00,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:00,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:48:00,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:48:00,479 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:01,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:01,154 INFO L93 Difference]: Finished difference Result 7321 states and 19097 transitions. [2021-06-04 21:48:01,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:48:01,155 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-04 21:48:01,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:01,162 INFO L225 Difference]: With dead ends: 7321 [2021-06-04 21:48:01,163 INFO L226 Difference]: Without dead ends: 7051 [2021-06-04 21:48:01,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 775.4ms TimeCoverageRelationStatistics Valid=1002, Invalid=3030, Unknown=0, NotChecked=0, Total=4032 [2021-06-04 21:48:01,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7051 states. [2021-06-04 21:48:01,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7051 to 5278. [2021-06-04 21:48:01,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:01,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-04 21:48:01,225 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-04 21:48:01,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:01,225 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-04 21:48:01,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:01,226 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-04 21:48:01,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:01,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:01,230 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:01,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-04 21:48:01,430 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:01,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:01,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1025305648, now seen corresponding path program 326 times [2021-06-04 21:48:01,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:01,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307663144] [2021-06-04 21:48:01,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:01,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:01,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:01,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307663144] [2021-06-04 21:48:01,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307663144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:01,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536965750] [2021-06-04 21:48:01,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:01,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:48:01,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:01,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:01,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:02,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536965750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:02,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:02,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-04 21:48:02,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19002331] [2021-06-04 21:48:02,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:02,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:02,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:02,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:02,048 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:02,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:02,885 INFO L93 Difference]: Finished difference Result 7271 states and 18997 transitions. [2021-06-04 21:48:02,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:48:02,885 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-04 21:48:02,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:02,893 INFO L225 Difference]: With dead ends: 7271 [2021-06-04 21:48:02,893 INFO L226 Difference]: Without dead ends: 7001 [2021-06-04 21:48:02,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 898.2ms TimeCoverageRelationStatistics Valid=1097, Invalid=3459, Unknown=0, NotChecked=0, Total=4556 [2021-06-04 21:48:02,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7001 states. [2021-06-04 21:48:02,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7001 to 5278. [2021-06-04 21:48:02,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:02,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-04 21:48:02,960 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-04 21:48:02,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:02,960 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-04 21:48:02,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:02,960 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-04 21:48:02,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:02,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:02,965 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:03,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-04 21:48:03,166 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:03,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:03,166 INFO L82 PathProgramCache]: Analyzing trace with hash -712020706, now seen corresponding path program 327 times [2021-06-04 21:48:03,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:03,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532261852] [2021-06-04 21:48:03,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:03,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:03,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:03,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532261852] [2021-06-04 21:48:03,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532261852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:03,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386252517] [2021-06-04 21:48:03,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:03,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-04 21:48:03,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:03,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:03,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:03,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386252517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:03,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:03,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-04 21:48:03,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68575686] [2021-06-04 21:48:03,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:48:03,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:03,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:48:03,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:48:03,828 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:04,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:04,586 INFO L93 Difference]: Finished difference Result 7221 states and 18897 transitions. [2021-06-04 21:48:04,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:48:04,586 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-04 21:48:04,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:04,594 INFO L225 Difference]: With dead ends: 7221 [2021-06-04 21:48:04,594 INFO L226 Difference]: Without dead ends: 6951 [2021-06-04 21:48:04,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 852.2ms TimeCoverageRelationStatistics Valid=1033, Invalid=3257, Unknown=0, NotChecked=0, Total=4290 [2021-06-04 21:48:04,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6951 states. [2021-06-04 21:48:04,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6951 to 5278. [2021-06-04 21:48:04,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:04,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-04 21:48:04,657 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-04 21:48:04,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:04,657 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-04 21:48:04,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:04,658 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-04 21:48:04,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:04,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:04,662 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:04,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-06-04 21:48:04,862 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:04,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:04,863 INFO L82 PathProgramCache]: Analyzing trace with hash 652527598, now seen corresponding path program 328 times [2021-06-04 21:48:04,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:04,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923364775] [2021-06-04 21:48:04,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:04,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:05,230 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:05,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:05,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923364775] [2021-06-04 21:48:05,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923364775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:05,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289911082] [2021-06-04 21:48:05,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:05,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:48:05,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:05,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:05,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:05,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289911082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:05,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:05,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-04 21:48:05,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341232129] [2021-06-04 21:48:05,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:05,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:05,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:05,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:05,524 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:06,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:06,425 INFO L93 Difference]: Finished difference Result 7171 states and 18797 transitions. [2021-06-04 21:48:06,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:48:06,426 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-04 21:48:06,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:06,433 INFO L225 Difference]: With dead ends: 7171 [2021-06-04 21:48:06,434 INFO L226 Difference]: Without dead ends: 6901 [2021-06-04 21:48:06,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 989.2ms TimeCoverageRelationStatistics Valid=1136, Invalid=3694, Unknown=0, NotChecked=0, Total=4830 [2021-06-04 21:48:06,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6901 states. [2021-06-04 21:48:06,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6901 to 5278. [2021-06-04 21:48:06,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:06,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-04 21:48:06,498 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-04 21:48:06,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:06,498 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-04 21:48:06,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:06,498 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-04 21:48:06,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:06,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:06,502 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:06,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2021-06-04 21:48:06,703 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:06,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:06,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1624704420, now seen corresponding path program 329 times [2021-06-04 21:48:06,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:06,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112227655] [2021-06-04 21:48:06,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:07,026 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:07,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:07,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112227655] [2021-06-04 21:48:07,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112227655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:07,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045599229] [2021-06-04 21:48:07,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:07,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-04 21:48:07,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:07,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:07,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:07,293 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:07,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045599229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:07,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:07,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-04 21:48:07,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871615275] [2021-06-04 21:48:07,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:48:07,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:07,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:48:07,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:48:07,294 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:08,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:08,152 INFO L93 Difference]: Finished difference Result 7121 states and 18697 transitions. [2021-06-04 21:48:08,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:48:08,152 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-04 21:48:08,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:08,159 INFO L225 Difference]: With dead ends: 7121 [2021-06-04 21:48:08,160 INFO L226 Difference]: Without dead ends: 6851 [2021-06-04 21:48:08,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 893.2ms TimeCoverageRelationStatistics Valid=1080, Invalid=3476, Unknown=0, NotChecked=0, Total=4556 [2021-06-04 21:48:08,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6851 states. [2021-06-04 21:48:08,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6851 to 5278. [2021-06-04 21:48:08,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:08,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-04 21:48:08,221 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-04 21:48:08,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:08,222 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-04 21:48:08,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:08,222 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-04 21:48:08,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:08,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:08,226 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:08,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-06-04 21:48:08,427 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:08,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:08,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1771739436, now seen corresponding path program 330 times [2021-06-04 21:48:08,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:08,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201095438] [2021-06-04 21:48:08,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:08,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:08,740 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:08,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:08,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201095438] [2021-06-04 21:48:08,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201095438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:08,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966602814] [2021-06-04 21:48:08,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:08,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-04 21:48:08,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:08,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:08,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:09,031 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:09,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966602814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:09,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:09,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-04 21:48:09,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915658878] [2021-06-04 21:48:09,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:09,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:09,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:09,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:09,032 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:09,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:09,982 INFO L93 Difference]: Finished difference Result 7071 states and 18597 transitions. [2021-06-04 21:48:09,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:48:09,982 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-04 21:48:09,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:09,990 INFO L225 Difference]: With dead ends: 7071 [2021-06-04 21:48:09,990 INFO L226 Difference]: Without dead ends: 6801 [2021-06-04 21:48:09,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 984.0ms TimeCoverageRelationStatistics Valid=1191, Invalid=3921, Unknown=0, NotChecked=0, Total=5112 [2021-06-04 21:48:09,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6801 states. [2021-06-04 21:48:10,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6801 to 5278. [2021-06-04 21:48:10,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:10,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-04 21:48:10,052 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-04 21:48:10,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:10,052 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-04 21:48:10,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:10,052 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-04 21:48:10,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:10,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:10,056 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:10,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:10,257 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:10,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:10,257 INFO L82 PathProgramCache]: Analyzing trace with hash 156785946, now seen corresponding path program 331 times [2021-06-04 21:48:10,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:10,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018097415] [2021-06-04 21:48:10,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:10,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:10,559 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:10,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:10,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018097415] [2021-06-04 21:48:10,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018097415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:10,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284949487] [2021-06-04 21:48:10,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:10,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:10,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:10,848 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:10,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284949487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:10,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:10,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-04 21:48:10,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292443215] [2021-06-04 21:48:10,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:48:10,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:10,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:48:10,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:48:10,849 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:11,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:11,686 INFO L93 Difference]: Finished difference Result 7021 states and 18497 transitions. [2021-06-04 21:48:11,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:48:11,686 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-04 21:48:11,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:11,693 INFO L225 Difference]: With dead ends: 7021 [2021-06-04 21:48:11,693 INFO L226 Difference]: Without dead ends: 6751 [2021-06-04 21:48:11,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 862.7ms TimeCoverageRelationStatistics Valid=1143, Invalid=3687, Unknown=0, NotChecked=0, Total=4830 [2021-06-04 21:48:11,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6751 states. [2021-06-04 21:48:11,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6751 to 5278. [2021-06-04 21:48:11,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:11,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-04 21:48:11,754 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-04 21:48:11,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:11,754 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-04 21:48:11,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:11,755 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-04 21:48:11,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:11,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:11,759 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:11,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:11,959 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:11,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:11,960 INFO L82 PathProgramCache]: Analyzing trace with hash -223658006, now seen corresponding path program 332 times [2021-06-04 21:48:11,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:11,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422590397] [2021-06-04 21:48:11,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:11,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:12,264 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:12,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:12,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422590397] [2021-06-04 21:48:12,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422590397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:12,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6812997] [2021-06-04 21:48:12,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:12,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:48:12,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:12,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:12,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:12,543 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:12,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6812997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:12,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:12,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-04 21:48:12,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864716867] [2021-06-04 21:48:12,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:12,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:12,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:12,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:12,544 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:13,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:13,613 INFO L93 Difference]: Finished difference Result 6971 states and 18397 transitions. [2021-06-04 21:48:13,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-04 21:48:13,613 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-04 21:48:13,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:13,619 INFO L225 Difference]: With dead ends: 6971 [2021-06-04 21:48:13,620 INFO L226 Difference]: Without dead ends: 6701 [2021-06-04 21:48:13,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 1065.7ms TimeCoverageRelationStatistics Valid=1262, Invalid=4140, Unknown=0, NotChecked=0, Total=5402 [2021-06-04 21:48:13,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6701 states. [2021-06-04 21:48:13,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6701 to 5278. [2021-06-04 21:48:13,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:13,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-04 21:48:13,678 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-04 21:48:13,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:13,678 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-04 21:48:13,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:13,678 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-04 21:48:13,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:13,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:13,682 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:13,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:13,883 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:13,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:13,883 INFO L82 PathProgramCache]: Analyzing trace with hash 400717144, now seen corresponding path program 333 times [2021-06-04 21:48:13,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:13,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039833214] [2021-06-04 21:48:13,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:14,173 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:14,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:14,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039833214] [2021-06-04 21:48:14,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039833214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:14,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657158769] [2021-06-04 21:48:14,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:14,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-04 21:48:14,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:14,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:14,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:14,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657158769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:14,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:14,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-04 21:48:14,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343860396] [2021-06-04 21:48:14,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:48:14,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:14,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:48:14,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:48:14,441 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:15,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:15,342 INFO L93 Difference]: Finished difference Result 6921 states and 18297 transitions. [2021-06-04 21:48:15,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:48:15,342 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-04 21:48:15,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:15,350 INFO L225 Difference]: With dead ends: 6921 [2021-06-04 21:48:15,350 INFO L226 Difference]: Without dead ends: 6651 [2021-06-04 21:48:15,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 893.5ms TimeCoverageRelationStatistics Valid=1222, Invalid=3890, Unknown=0, NotChecked=0, Total=5112 [2021-06-04 21:48:15,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6651 states. [2021-06-04 21:48:15,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6651 to 5278. [2021-06-04 21:48:15,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:15,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-04 21:48:15,412 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-04 21:48:15,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:15,412 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-04 21:48:15,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:15,413 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-04 21:48:15,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:15,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:15,417 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:15,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:15,617 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:15,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:15,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1209769000, now seen corresponding path program 334 times [2021-06-04 21:48:15,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:15,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936010284] [2021-06-04 21:48:15,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:15,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:15,918 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:15,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:15,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936010284] [2021-06-04 21:48:15,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936010284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:15,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749776177] [2021-06-04 21:48:15,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:15,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:48:15,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:15,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:15,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:16,221 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:16,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749776177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:16,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:16,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-04 21:48:16,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812548303] [2021-06-04 21:48:16,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:16,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:16,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:16,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:16,222 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:17,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:17,322 INFO L93 Difference]: Finished difference Result 6871 states and 18197 transitions. [2021-06-04 21:48:17,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:48:17,322 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-04 21:48:17,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:17,330 INFO L225 Difference]: With dead ends: 6871 [2021-06-04 21:48:17,330 INFO L226 Difference]: Without dead ends: 6601 [2021-06-04 21:48:17,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 1091.4ms TimeCoverageRelationStatistics Valid=1349, Invalid=4351, Unknown=0, NotChecked=0, Total=5700 [2021-06-04 21:48:17,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6601 states. [2021-06-04 21:48:17,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6601 to 5278. [2021-06-04 21:48:17,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:17,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-04 21:48:17,391 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-04 21:48:17,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:17,392 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-04 21:48:17,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:17,392 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-04 21:48:17,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:17,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:17,396 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:17,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-04 21:48:17,597 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:17,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:17,597 INFO L82 PathProgramCache]: Analyzing trace with hash -182181098, now seen corresponding path program 335 times [2021-06-04 21:48:17,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:17,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938331939] [2021-06-04 21:48:17,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:17,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:17,880 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:17,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:17,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938331939] [2021-06-04 21:48:17,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938331939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:17,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285790479] [2021-06-04 21:48:17,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:17,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-04 21:48:17,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:17,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:17,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:18,138 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:18,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285790479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:18,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:18,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-04 21:48:18,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958386156] [2021-06-04 21:48:18,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:48:18,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:18,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:48:18,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:48:18,139 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:19,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:19,109 INFO L93 Difference]: Finished difference Result 6821 states and 18097 transitions. [2021-06-04 21:48:19,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-04 21:48:19,110 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-04 21:48:19,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:19,115 INFO L225 Difference]: With dead ends: 6821 [2021-06-04 21:48:19,115 INFO L226 Difference]: Without dead ends: 6551 [2021-06-04 21:48:19,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 941.2ms TimeCoverageRelationStatistics Valid=1317, Invalid=4085, Unknown=0, NotChecked=0, Total=5402 [2021-06-04 21:48:19,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6551 states. [2021-06-04 21:48:19,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6551 to 5278. [2021-06-04 21:48:19,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:19,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-04 21:48:19,170 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-04 21:48:19,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:19,170 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-04 21:48:19,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:19,171 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-04 21:48:19,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:19,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:19,175 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:19,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-04 21:48:19,375 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:19,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:19,376 INFO L82 PathProgramCache]: Analyzing trace with hash -427258394, now seen corresponding path program 336 times [2021-06-04 21:48:19,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:19,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758124442] [2021-06-04 21:48:19,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:19,669 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:19,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:19,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758124442] [2021-06-04 21:48:19,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758124442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:19,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674769209] [2021-06-04 21:48:19,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:19,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-04 21:48:19,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:19,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:19,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:19,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674769209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:19,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:19,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-04 21:48:19,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228660984] [2021-06-04 21:48:19,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:19,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:19,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:19,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:19,953 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:21,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:21,075 INFO L93 Difference]: Finished difference Result 6771 states and 17997 transitions. [2021-06-04 21:48:21,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-04 21:48:21,075 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-04 21:48:21,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:21,082 INFO L225 Difference]: With dead ends: 6771 [2021-06-04 21:48:21,082 INFO L226 Difference]: Without dead ends: 6501 [2021-06-04 21:48:21,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 1128.0ms TimeCoverageRelationStatistics Valid=1452, Invalid=4554, Unknown=0, NotChecked=0, Total=6006 [2021-06-04 21:48:21,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6501 states. [2021-06-04 21:48:21,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6501 to 5278. [2021-06-04 21:48:21,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:21,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-04 21:48:21,144 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-04 21:48:21,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:21,144 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-04 21:48:21,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:21,144 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-04 21:48:21,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:21,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:21,148 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:21,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-04 21:48:21,349 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:21,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:21,349 INFO L82 PathProgramCache]: Analyzing trace with hash -804108716, now seen corresponding path program 337 times [2021-06-04 21:48:21,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:21,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259809905] [2021-06-04 21:48:21,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:21,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:21,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259809905] [2021-06-04 21:48:21,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259809905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:21,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395174315] [2021-06-04 21:48:21,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:21,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:21,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:21,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395174315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:21,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:21,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-04 21:48:21,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094820984] [2021-06-04 21:48:21,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:48:21,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:21,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:48:21,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:48:21,926 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:22,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:22,901 INFO L93 Difference]: Finished difference Result 6721 states and 17897 transitions. [2021-06-04 21:48:22,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-04 21:48:22,901 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-04 21:48:22,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:22,908 INFO L225 Difference]: With dead ends: 6721 [2021-06-04 21:48:22,909 INFO L226 Difference]: Without dead ends: 6451 [2021-06-04 21:48:22,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 956.4ms TimeCoverageRelationStatistics Valid=1428, Invalid=4272, Unknown=0, NotChecked=0, Total=5700 [2021-06-04 21:48:22,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6451 states. [2021-06-04 21:48:22,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6451 to 5278. [2021-06-04 21:48:22,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:22,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-04 21:48:22,970 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-04 21:48:22,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:22,970 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-04 21:48:22,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:22,970 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-04 21:48:22,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:22,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:22,974 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:23,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-04 21:48:23,175 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:23,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:23,175 INFO L82 PathProgramCache]: Analyzing trace with hash 522646820, now seen corresponding path program 338 times [2021-06-04 21:48:23,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:23,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326277323] [2021-06-04 21:48:23,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:23,460 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:23,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:23,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326277323] [2021-06-04 21:48:23,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326277323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:23,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125038868] [2021-06-04 21:48:23,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:23,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:48:23,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:23,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:23,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:23,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125038868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:23,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:23,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-04 21:48:23,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945585880] [2021-06-04 21:48:23,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:23,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:23,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:23,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:23,733 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:24,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:24,960 INFO L93 Difference]: Finished difference Result 6671 states and 17797 transitions. [2021-06-04 21:48:24,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-04 21:48:24,960 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-04 21:48:24,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:24,966 INFO L225 Difference]: With dead ends: 6671 [2021-06-04 21:48:24,967 INFO L226 Difference]: Without dead ends: 6401 [2021-06-04 21:48:24,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 1195.4ms TimeCoverageRelationStatistics Valid=1571, Invalid=4749, Unknown=0, NotChecked=0, Total=6320 [2021-06-04 21:48:24,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6401 states. [2021-06-04 21:48:25,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6401 to 5278. [2021-06-04 21:48:25,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:25,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-04 21:48:25,025 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-04 21:48:25,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:25,025 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-04 21:48:25,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:25,026 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-04 21:48:25,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:25,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:25,030 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:25,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:25,231 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:25,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:25,231 INFO L82 PathProgramCache]: Analyzing trace with hash 976862994, now seen corresponding path program 339 times [2021-06-04 21:48:25,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:25,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001022009] [2021-06-04 21:48:25,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:25,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:25,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001022009] [2021-06-04 21:48:25,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001022009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:25,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811495874] [2021-06-04 21:48:25,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:25,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-04 21:48:25,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:25,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:25,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:25,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811495874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:25,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:25,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-04 21:48:25,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726680503] [2021-06-04 21:48:25,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:48:25,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:25,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:48:25,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:48:25,778 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:26,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:26,815 INFO L93 Difference]: Finished difference Result 6621 states and 17697 transitions. [2021-06-04 21:48:26,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-04 21:48:26,815 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-04 21:48:26,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:26,823 INFO L225 Difference]: With dead ends: 6621 [2021-06-04 21:48:26,824 INFO L226 Difference]: Without dead ends: 6351 [2021-06-04 21:48:26,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 1006.3ms TimeCoverageRelationStatistics Valid=1555, Invalid=4451, Unknown=0, NotChecked=0, Total=6006 [2021-06-04 21:48:26,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6351 states. [2021-06-04 21:48:26,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6351 to 5278. [2021-06-04 21:48:26,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:26,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-04 21:48:26,885 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-04 21:48:26,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:26,885 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-04 21:48:26,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:26,885 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-04 21:48:26,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:26,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:26,889 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:27,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-06-04 21:48:27,090 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:27,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:27,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1975759330, now seen corresponding path program 340 times [2021-06-04 21:48:27,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:27,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941662615] [2021-06-04 21:48:27,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:27,374 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:27,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:27,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941662615] [2021-06-04 21:48:27,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941662615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:27,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122287312] [2021-06-04 21:48:27,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:27,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:48:27,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:27,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:27,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:27,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122287312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:27,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:27,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-04 21:48:27,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623025072] [2021-06-04 21:48:27,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:27,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:27,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:27,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:27,678 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:28,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:28,996 INFO L93 Difference]: Finished difference Result 6571 states and 17597 transitions. [2021-06-04 21:48:28,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-04 21:48:28,996 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-04 21:48:28,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:29,003 INFO L225 Difference]: With dead ends: 6571 [2021-06-04 21:48:29,003 INFO L226 Difference]: Without dead ends: 6301 [2021-06-04 21:48:29,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 1218.8ms TimeCoverageRelationStatistics Valid=1706, Invalid=4936, Unknown=0, NotChecked=0, Total=6642 [2021-06-04 21:48:29,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6301 states. [2021-06-04 21:48:29,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6301 to 5278. [2021-06-04 21:48:29,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:29,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-04 21:48:29,062 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-04 21:48:29,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:29,062 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-04 21:48:29,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:29,063 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-04 21:48:29,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:29,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:29,067 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:29,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:29,267 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:29,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:29,268 INFO L82 PathProgramCache]: Analyzing trace with hash 96431440, now seen corresponding path program 341 times [2021-06-04 21:48:29,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:29,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303629977] [2021-06-04 21:48:29,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:29,547 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:29,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:29,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303629977] [2021-06-04 21:48:29,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303629977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:29,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008308116] [2021-06-04 21:48:29,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:29,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-04 21:48:29,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:29,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:29,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:29,800 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:29,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008308116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:29,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:29,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-04 21:48:29,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887272447] [2021-06-04 21:48:29,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:48:29,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:29,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:48:29,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:48:29,801 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:30,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:30,928 INFO L93 Difference]: Finished difference Result 6521 states and 17497 transitions. [2021-06-04 21:48:30,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-04 21:48:30,928 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-04 21:48:30,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:30,934 INFO L225 Difference]: With dead ends: 6521 [2021-06-04 21:48:30,934 INFO L226 Difference]: Without dead ends: 6251 [2021-06-04 21:48:30,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1022.9ms TimeCoverageRelationStatistics Valid=1698, Invalid=4622, Unknown=0, NotChecked=0, Total=6320 [2021-06-04 21:48:30,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6251 states. [2021-06-04 21:48:30,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6251 to 5278. [2021-06-04 21:48:30,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:30,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-04 21:48:30,992 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-04 21:48:30,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:30,992 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-04 21:48:30,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:30,992 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-04 21:48:30,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:30,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:30,996 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:31,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-06-04 21:48:31,197 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:31,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:31,197 INFO L82 PathProgramCache]: Analyzing trace with hash 2126750752, now seen corresponding path program 342 times [2021-06-04 21:48:31,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:31,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639300212] [2021-06-04 21:48:31,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:31,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:31,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:31,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639300212] [2021-06-04 21:48:31,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639300212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:31,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985077811] [2021-06-04 21:48:31,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:31,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-04 21:48:31,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:31,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:31,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:31,764 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:31,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985077811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:31,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:31,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-04 21:48:31,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089057950] [2021-06-04 21:48:31,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:31,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:31,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:31,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:31,765 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:33,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:33,130 INFO L93 Difference]: Finished difference Result 6471 states and 17397 transitions. [2021-06-04 21:48:33,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-04 21:48:33,131 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-04 21:48:33,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:33,138 INFO L225 Difference]: With dead ends: 6471 [2021-06-04 21:48:33,138 INFO L226 Difference]: Without dead ends: 6201 [2021-06-04 21:48:33,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 1275.5ms TimeCoverageRelationStatistics Valid=1857, Invalid=5115, Unknown=0, NotChecked=0, Total=6972 [2021-06-04 21:48:33,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6201 states. [2021-06-04 21:48:33,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6201 to 5278. [2021-06-04 21:48:33,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:33,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-04 21:48:33,213 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-04 21:48:33,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:33,214 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-04 21:48:33,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:33,214 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-04 21:48:33,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:33,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:33,218 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:33,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:33,419 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:33,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:33,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1553977074, now seen corresponding path program 343 times [2021-06-04 21:48:33,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:33,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097664837] [2021-06-04 21:48:33,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:33,702 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:33,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:33,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097664837] [2021-06-04 21:48:33,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097664837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:33,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379804501] [2021-06-04 21:48:33,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:33,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:33,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:33,967 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:33,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379804501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:33,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:33,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-04 21:48:33,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928866476] [2021-06-04 21:48:33,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:48:33,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:33,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:48:33,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:48:33,968 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:35,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:35,108 INFO L93 Difference]: Finished difference Result 6421 states and 17297 transitions. [2021-06-04 21:48:35,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-04 21:48:35,108 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-04 21:48:35,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:35,115 INFO L225 Difference]: With dead ends: 6421 [2021-06-04 21:48:35,115 INFO L226 Difference]: Without dead ends: 6151 [2021-06-04 21:48:35,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1746 ImplicationChecksByTransitivity, 1061.7ms TimeCoverageRelationStatistics Valid=1857, Invalid=4785, Unknown=0, NotChecked=0, Total=6642 [2021-06-04 21:48:35,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6151 states. [2021-06-04 21:48:35,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6151 to 5278. [2021-06-04 21:48:35,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:35,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-04 21:48:35,175 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-04 21:48:35,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:35,175 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-04 21:48:35,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:35,176 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-04 21:48:35,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:35,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:35,180 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:35,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:35,380 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:35,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:35,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1025747934, now seen corresponding path program 344 times [2021-06-04 21:48:35,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:35,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756917744] [2021-06-04 21:48:35,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:35,668 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:35,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:35,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756917744] [2021-06-04 21:48:35,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756917744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:35,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623849544] [2021-06-04 21:48:35,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:35,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:48:35,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:35,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:35,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:35,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623849544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:35,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:35,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-04 21:48:35,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005403511] [2021-06-04 21:48:35,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:35,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:35,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:35,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:35,967 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:37,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:37,462 INFO L93 Difference]: Finished difference Result 6879 states and 18563 transitions. [2021-06-04 21:48:37,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-04 21:48:37,463 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-04 21:48:37,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:37,470 INFO L225 Difference]: With dead ends: 6879 [2021-06-04 21:48:37,470 INFO L226 Difference]: Without dead ends: 6256 [2021-06-04 21:48:37,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2025 ImplicationChecksByTransitivity, 1387.0ms TimeCoverageRelationStatistics Valid=2045, Invalid=5611, Unknown=0, NotChecked=0, Total=7656 [2021-06-04 21:48:37,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6256 states. [2021-06-04 21:48:37,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6256 to 5188. [2021-06-04 21:48:37,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5188 states, 5187 states have (on average 2.82398303450935) internal successors, (14648), 5187 states have internal predecessors, (14648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:37,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5188 states to 5188 states and 14648 transitions. [2021-06-04 21:48:37,540 INFO L78 Accepts]: Start accepts. Automaton has 5188 states and 14648 transitions. Word has length 160 [2021-06-04 21:48:37,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:37,540 INFO L482 AbstractCegarLoop]: Abstraction has 5188 states and 14648 transitions. [2021-06-04 21:48:37,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:37,541 INFO L276 IsEmpty]: Start isEmpty. Operand 5188 states and 14648 transitions. [2021-06-04 21:48:37,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:37,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:37,545 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:37,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:37,746 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:37,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:37,746 INFO L82 PathProgramCache]: Analyzing trace with hash -6899668, now seen corresponding path program 345 times [2021-06-04 21:48:37,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:37,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50547355] [2021-06-04 21:48:37,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:38,031 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:38,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:38,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50547355] [2021-06-04 21:48:38,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50547355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:38,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205269318] [2021-06-04 21:48:38,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:38,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-04 21:48:38,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:38,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:38,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:38,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205269318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:38,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:38,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-04 21:48:38,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051042690] [2021-06-04 21:48:38,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:48:38,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:38,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:48:38,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:48:38,289 INFO L87 Difference]: Start difference. First operand 5188 states and 14648 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:39,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:39,464 INFO L93 Difference]: Finished difference Result 7108 states and 19281 transitions. [2021-06-04 21:48:39,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-04 21:48:39,465 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-04 21:48:39,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:39,472 INFO L225 Difference]: With dead ends: 7108 [2021-06-04 21:48:39,472 INFO L226 Difference]: Without dead ends: 6838 [2021-06-04 21:48:39,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1871 ImplicationChecksByTransitivity, 1126.7ms TimeCoverageRelationStatistics Valid=2033, Invalid=4939, Unknown=0, NotChecked=0, Total=6972 [2021-06-04 21:48:39,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6838 states. [2021-06-04 21:48:39,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6838 to 5368. [2021-06-04 21:48:39,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5368 states, 5367 states have (on average 2.8334264952487422) internal successors, (15207), 5367 states have internal predecessors, (15207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:39,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5368 states to 5368 states and 15207 transitions. [2021-06-04 21:48:39,535 INFO L78 Accepts]: Start accepts. Automaton has 5368 states and 15207 transitions. Word has length 160 [2021-06-04 21:48:39,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:39,535 INFO L482 AbstractCegarLoop]: Abstraction has 5368 states and 15207 transitions. [2021-06-04 21:48:39,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:39,536 INFO L276 IsEmpty]: Start isEmpty. Operand 5368 states and 15207 transitions. [2021-06-04 21:48:39,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:39,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:39,540 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:39,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-06-04 21:48:39,741 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:39,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:39,741 INFO L82 PathProgramCache]: Analyzing trace with hash 15443582, now seen corresponding path program 346 times [2021-06-04 21:48:39,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:39,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758683951] [2021-06-04 21:48:39,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:39,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:40,034 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:40,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:40,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758683951] [2021-06-04 21:48:40,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758683951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:40,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064278489] [2021-06-04 21:48:40,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:40,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:48:40,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:40,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:40,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:40,299 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:40,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064278489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:40,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:40,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-04 21:48:40,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677488165] [2021-06-04 21:48:40,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:40,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:40,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:40,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:40,300 INFO L87 Difference]: Start difference. First operand 5368 states and 15207 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:41,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:41,775 INFO L93 Difference]: Finished difference Result 6595 states and 17981 transitions. [2021-06-04 21:48:41,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-04 21:48:41,775 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-06-04 21:48:41,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:41,780 INFO L225 Difference]: With dead ends: 6595 [2021-06-04 21:48:41,780 INFO L226 Difference]: Without dead ends: 6106 [2021-06-04 21:48:41,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2051 ImplicationChecksByTransitivity, 1383.0ms TimeCoverageRelationStatistics Valid=2210, Invalid=5446, Unknown=0, NotChecked=0, Total=7656 [2021-06-04 21:48:41,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6106 states. [2021-06-04 21:48:41,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6106 to 3513. [2021-06-04 21:48:41,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 3512 states have (on average 2.7414578587699316) internal successors, (9628), 3512 states have internal predecessors, (9628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:41,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 9628 transitions. [2021-06-04 21:48:41,827 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 9628 transitions. Word has length 160 [2021-06-04 21:48:41,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:41,828 INFO L482 AbstractCegarLoop]: Abstraction has 3513 states and 9628 transitions. [2021-06-04 21:48:41,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:41,828 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 9628 transitions. [2021-06-04 21:48:41,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:48:41,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:41,831 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:42,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-06-04 21:48:42,032 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:42,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:42,032 INFO L82 PathProgramCache]: Analyzing trace with hash 278983457, now seen corresponding path program 347 times [2021-06-04 21:48:42,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:42,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683081992] [2021-06-04 21:48:42,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:42,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:42,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683081992] [2021-06-04 21:48:42,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683081992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:42,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67762868] [2021-06-04 21:48:42,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:42,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-04 21:48:42,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:42,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:48:42,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:42,674 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:42,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67762868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:42,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:42,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-04 21:48:42,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435663013] [2021-06-04 21:48:42,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:42,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:42,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:42,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:42,675 INFO L87 Difference]: Start difference. First operand 3513 states and 9628 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:43,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:43,360 INFO L93 Difference]: Finished difference Result 5231 states and 13267 transitions. [2021-06-04 21:48:43,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:48:43,361 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-04 21:48:43,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:43,365 INFO L225 Difference]: With dead ends: 5231 [2021-06-04 21:48:43,366 INFO L226 Difference]: Without dead ends: 4961 [2021-06-04 21:48:43,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 797.1ms TimeCoverageRelationStatistics Valid=1074, Invalid=2958, Unknown=0, NotChecked=0, Total=4032 [2021-06-04 21:48:43,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4961 states. [2021-06-04 21:48:43,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4961 to 3588. [2021-06-04 21:48:43,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3588 states, 3587 states have (on average 2.7468636743797044) internal successors, (9853), 3587 states have internal predecessors, (9853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:43,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3588 states to 3588 states and 9853 transitions. [2021-06-04 21:48:43,407 INFO L78 Accepts]: Start accepts. Automaton has 3588 states and 9853 transitions. Word has length 165 [2021-06-04 21:48:43,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:43,407 INFO L482 AbstractCegarLoop]: Abstraction has 3588 states and 9853 transitions. [2021-06-04 21:48:43,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:43,407 INFO L276 IsEmpty]: Start isEmpty. Operand 3588 states and 9853 transitions. [2021-06-04 21:48:43,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:48:43,410 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:43,411 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:43,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-06-04 21:48:43,611 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:43,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:43,611 INFO L82 PathProgramCache]: Analyzing trace with hash -222330383, now seen corresponding path program 348 times [2021-06-04 21:48:43,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:43,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140502090] [2021-06-04 21:48:43,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:43,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:43,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140502090] [2021-06-04 21:48:43,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140502090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:43,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761139630] [2021-06-04 21:48:43,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:44,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-04 21:48:44,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:44,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:48:44,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:44,286 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:44,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761139630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:44,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:44,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-04 21:48:44,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710025268] [2021-06-04 21:48:44,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:48:44,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:44,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:48:44,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:48:44,287 INFO L87 Difference]: Start difference. First operand 3588 states and 9853 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:44,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:44,988 INFO L93 Difference]: Finished difference Result 5901 states and 14682 transitions. [2021-06-04 21:48:44,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:48:44,989 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-04 21:48:44,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:44,994 INFO L225 Difference]: With dead ends: 5901 [2021-06-04 21:48:44,994 INFO L226 Difference]: Without dead ends: 5631 [2021-06-04 21:48:44,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 862.5ms TimeCoverageRelationStatistics Valid=1139, Invalid=3283, Unknown=0, NotChecked=0, Total=4422 [2021-06-04 21:48:44,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5631 states. [2021-06-04 21:48:45,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5631 to 3663. [2021-06-04 21:48:45,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3663 states, 3662 states have (on average 2.75204806116876) internal successors, (10078), 3662 states have internal predecessors, (10078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:45,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 10078 transitions. [2021-06-04 21:48:45,039 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 10078 transitions. Word has length 165 [2021-06-04 21:48:45,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:45,039 INFO L482 AbstractCegarLoop]: Abstraction has 3663 states and 10078 transitions. [2021-06-04 21:48:45,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:45,039 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 10078 transitions. [2021-06-04 21:48:45,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:48:45,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:45,042 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:45,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable356,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:45,242 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:45,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:45,243 INFO L82 PathProgramCache]: Analyzing trace with hash 254164959, now seen corresponding path program 349 times [2021-06-04 21:48:45,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:45,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905500326] [2021-06-04 21:48:45,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:45,590 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:45,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:45,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905500326] [2021-06-04 21:48:45,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905500326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:45,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475872042] [2021-06-04 21:48:45,590 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:45,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:45,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:48:45,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:45,862 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:45,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475872042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:45,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:45,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-04 21:48:45,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762058700] [2021-06-04 21:48:45,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:45,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:45,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:45,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:45,863 INFO L87 Difference]: Start difference. First operand 3663 states and 10078 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:46,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:46,531 INFO L93 Difference]: Finished difference Result 5931 states and 14817 transitions. [2021-06-04 21:48:46,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:48:46,532 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-04 21:48:46,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:46,537 INFO L225 Difference]: With dead ends: 5931 [2021-06-04 21:48:46,538 INFO L226 Difference]: Without dead ends: 5661 [2021-06-04 21:48:46,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 814.5ms TimeCoverageRelationStatistics Valid=1131, Invalid=3291, Unknown=0, NotChecked=0, Total=4422 [2021-06-04 21:48:46,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5661 states. [2021-06-04 21:48:46,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5661 to 3738. [2021-06-04 21:48:46,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3738 states, 3737 states have (on average 2.757024351083757) internal successors, (10303), 3737 states have internal predecessors, (10303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:46,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 10303 transitions. [2021-06-04 21:48:46,591 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 10303 transitions. Word has length 165 [2021-06-04 21:48:46,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:46,591 INFO L482 AbstractCegarLoop]: Abstraction has 3738 states and 10303 transitions. [2021-06-04 21:48:46,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:46,591 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 10303 transitions. [2021-06-04 21:48:46,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:48:46,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:46,595 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:46,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-04 21:48:46,795 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:46,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:46,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1720849071, now seen corresponding path program 350 times [2021-06-04 21:48:46,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:46,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571722562] [2021-06-04 21:48:46,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:47,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:47,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571722562] [2021-06-04 21:48:47,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571722562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:47,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196678783] [2021-06-04 21:48:47,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:47,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:48:47,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:47,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:48:47,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:47,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196678783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:47,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:47,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-04 21:48:47,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183427579] [2021-06-04 21:48:47,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:48:47,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:47,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:48:47,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:48:47,469 INFO L87 Difference]: Start difference. First operand 3738 states and 10303 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:48,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:48,284 INFO L93 Difference]: Finished difference Result 5956 states and 14942 transitions. [2021-06-04 21:48:48,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:48:48,284 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-04 21:48:48,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:48,290 INFO L225 Difference]: With dead ends: 5956 [2021-06-04 21:48:48,290 INFO L226 Difference]: Without dead ends: 5686 [2021-06-04 21:48:48,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 926.6ms TimeCoverageRelationStatistics Valid=1153, Invalid=3539, Unknown=0, NotChecked=0, Total=4692 [2021-06-04 21:48:48,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-06-04 21:48:48,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 3813. [2021-06-04 21:48:48,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 3812 states have (on average 2.7618048268625395) internal successors, (10528), 3812 states have internal predecessors, (10528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:48,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 10528 transitions. [2021-06-04 21:48:48,338 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 10528 transitions. Word has length 165 [2021-06-04 21:48:48,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:48,338 INFO L482 AbstractCegarLoop]: Abstraction has 3813 states and 10528 transitions. [2021-06-04 21:48:48,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:48,338 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 10528 transitions. [2021-06-04 21:48:48,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:48:48,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:48,341 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:48,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:48,542 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:48,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:48,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1585627677, now seen corresponding path program 351 times [2021-06-04 21:48:48,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:48,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549199693] [2021-06-04 21:48:48,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:48,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:48,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549199693] [2021-06-04 21:48:48,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549199693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:48,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215949918] [2021-06-04 21:48:48,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:48,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-04 21:48:48,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:48,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:48:48,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:49,185 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:49,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215949918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:49,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:49,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-04 21:48:49,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721446069] [2021-06-04 21:48:49,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:49,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:49,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:49,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:49,186 INFO L87 Difference]: Start difference. First operand 3813 states and 10528 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:49,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:49,952 INFO L93 Difference]: Finished difference Result 5981 states and 15067 transitions. [2021-06-04 21:48:49,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:48:49,952 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-04 21:48:49,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:49,958 INFO L225 Difference]: With dead ends: 5981 [2021-06-04 21:48:49,958 INFO L226 Difference]: Without dead ends: 5711 [2021-06-04 21:48:49,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 855.5ms TimeCoverageRelationStatistics Valid=1159, Invalid=3533, Unknown=0, NotChecked=0, Total=4692 [2021-06-04 21:48:49,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5711 states. [2021-06-04 21:48:50,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5711 to 3888. [2021-06-04 21:48:50,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3888 states, 3887 states have (on average 2.7664008232570105) internal successors, (10753), 3887 states have internal predecessors, (10753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:50,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3888 states to 3888 states and 10753 transitions. [2021-06-04 21:48:50,029 INFO L78 Accepts]: Start accepts. Automaton has 3888 states and 10753 transitions. Word has length 165 [2021-06-04 21:48:50,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:50,029 INFO L482 AbstractCegarLoop]: Abstraction has 3888 states and 10753 transitions. [2021-06-04 21:48:50,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:50,029 INFO L276 IsEmpty]: Start isEmpty. Operand 3888 states and 10753 transitions. [2021-06-04 21:48:50,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:48:50,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:50,032 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:50,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-06-04 21:48:50,233 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:50,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:50,233 INFO L82 PathProgramCache]: Analyzing trace with hash 708892909, now seen corresponding path program 352 times [2021-06-04 21:48:50,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:50,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957550035] [2021-06-04 21:48:50,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:50,586 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:50,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:50,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957550035] [2021-06-04 21:48:50,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957550035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:50,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348407313] [2021-06-04 21:48:50,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:50,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:48:50,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:50,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:48:50,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:50,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348407313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:50,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:50,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-04 21:48:50,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824735056] [2021-06-04 21:48:50,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:48:50,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:50,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:48:50,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:48:50,879 INFO L87 Difference]: Start difference. First operand 3888 states and 10753 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:51,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:51,764 INFO L93 Difference]: Finished difference Result 6006 states and 15192 transitions. [2021-06-04 21:48:51,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:48:51,764 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-04 21:48:51,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:51,770 INFO L225 Difference]: With dead ends: 6006 [2021-06-04 21:48:51,770 INFO L226 Difference]: Without dead ends: 5736 [2021-06-04 21:48:51,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 958.9ms TimeCoverageRelationStatistics Valid=1183, Invalid=3787, Unknown=0, NotChecked=0, Total=4970 [2021-06-04 21:48:51,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5736 states. [2021-06-04 21:48:51,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5736 to 3963. [2021-06-04 21:48:51,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3963 states, 3962 states have (on average 2.7708228167592126) internal successors, (10978), 3962 states have internal predecessors, (10978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:51,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3963 states to 3963 states and 10978 transitions. [2021-06-04 21:48:51,820 INFO L78 Accepts]: Start accepts. Automaton has 3963 states and 10978 transitions. Word has length 165 [2021-06-04 21:48:51,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:51,820 INFO L482 AbstractCegarLoop]: Abstraction has 3963 states and 10978 transitions. [2021-06-04 21:48:51,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:51,820 INFO L276 IsEmpty]: Start isEmpty. Operand 3963 states and 10978 transitions. [2021-06-04 21:48:51,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:48:51,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:51,823 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:52,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:52,024 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:52,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:52,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1028433445, now seen corresponding path program 353 times [2021-06-04 21:48:52,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:52,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671703465] [2021-06-04 21:48:52,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:52,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:52,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:52,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671703465] [2021-06-04 21:48:52,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671703465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:52,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978931376] [2021-06-04 21:48:52,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:52,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-04 21:48:52,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:52,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:48:52,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:52,624 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:52,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978931376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:52,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:52,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-04 21:48:52,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629961602] [2021-06-04 21:48:52,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:52,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:52,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:52,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:52,625 INFO L87 Difference]: Start difference. First operand 3963 states and 10978 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:53,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:53,440 INFO L93 Difference]: Finished difference Result 6031 states and 15317 transitions. [2021-06-04 21:48:53,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:48:53,441 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-04 21:48:53,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:53,446 INFO L225 Difference]: With dead ends: 6031 [2021-06-04 21:48:53,446 INFO L226 Difference]: Without dead ends: 5761 [2021-06-04 21:48:53,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 875.0ms TimeCoverageRelationStatistics Valid=1203, Invalid=3767, Unknown=0, NotChecked=0, Total=4970 [2021-06-04 21:48:53,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5761 states. [2021-06-04 21:48:53,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5761 to 4038. [2021-06-04 21:48:53,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4038 states, 4037 states have (on average 2.775080505325737) internal successors, (11203), 4037 states have internal predecessors, (11203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:53,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 11203 transitions. [2021-06-04 21:48:53,498 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 11203 transitions. Word has length 165 [2021-06-04 21:48:53,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:53,498 INFO L482 AbstractCegarLoop]: Abstraction has 4038 states and 11203 transitions. [2021-06-04 21:48:53,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:53,498 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 11203 transitions. [2021-06-04 21:48:53,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:48:53,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:53,502 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:53,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:53,702 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:53,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:53,702 INFO L82 PathProgramCache]: Analyzing trace with hash 336114859, now seen corresponding path program 354 times [2021-06-04 21:48:53,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:53,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413146416] [2021-06-04 21:48:53,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:53,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:54,043 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:54,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:54,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413146416] [2021-06-04 21:48:54,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413146416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:54,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107857646] [2021-06-04 21:48:54,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:54,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-04 21:48:54,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:54,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:48:54,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:54,336 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:54,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107857646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:54,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:54,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-04 21:48:54,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782770942] [2021-06-04 21:48:54,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:48:54,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:54,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:48:54,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:48:54,337 INFO L87 Difference]: Start difference. First operand 4038 states and 11203 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:55,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:55,281 INFO L93 Difference]: Finished difference Result 6056 states and 15442 transitions. [2021-06-04 21:48:55,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:48:55,281 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-04 21:48:55,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:55,287 INFO L225 Difference]: With dead ends: 6056 [2021-06-04 21:48:55,287 INFO L226 Difference]: Without dead ends: 5786 [2021-06-04 21:48:55,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 992.4ms TimeCoverageRelationStatistics Valid=1229, Invalid=4027, Unknown=0, NotChecked=0, Total=5256 [2021-06-04 21:48:55,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2021-06-04 21:48:55,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 4113. [2021-06-04 21:48:55,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4113 states, 4112 states have (on average 2.779182879377432) internal successors, (11428), 4112 states have internal predecessors, (11428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:55,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 11428 transitions. [2021-06-04 21:48:55,339 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 11428 transitions. Word has length 165 [2021-06-04 21:48:55,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:55,339 INFO L482 AbstractCegarLoop]: Abstraction has 4113 states and 11428 transitions. [2021-06-04 21:48:55,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:55,339 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 11428 transitions. [2021-06-04 21:48:55,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:48:55,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:55,342 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:55,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:55,543 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:55,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:55,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1941117159, now seen corresponding path program 355 times [2021-06-04 21:48:55,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:55,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997942271] [2021-06-04 21:48:55,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:55,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:55,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:55,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997942271] [2021-06-04 21:48:55,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997942271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:55,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627740445] [2021-06-04 21:48:55,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:55,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:48:55,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:56,155 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:56,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627740445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:56,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:56,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-04 21:48:56,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402004875] [2021-06-04 21:48:56,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:56,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:56,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:56,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:56,156 INFO L87 Difference]: Start difference. First operand 4113 states and 11428 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:57,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:57,006 INFO L93 Difference]: Finished difference Result 6081 states and 15567 transitions. [2021-06-04 21:48:57,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:48:57,006 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-04 21:48:57,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:57,012 INFO L225 Difference]: With dead ends: 6081 [2021-06-04 21:48:57,012 INFO L226 Difference]: Without dead ends: 5811 [2021-06-04 21:48:57,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 924.1ms TimeCoverageRelationStatistics Valid=1263, Invalid=3993, Unknown=0, NotChecked=0, Total=5256 [2021-06-04 21:48:57,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5811 states. [2021-06-04 21:48:57,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5811 to 4188. [2021-06-04 21:48:57,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4188 states, 4187 states have (on average 2.7831382851683784) internal successors, (11653), 4187 states have internal predecessors, (11653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:57,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 11653 transitions. [2021-06-04 21:48:57,071 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 11653 transitions. Word has length 165 [2021-06-04 21:48:57,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:57,071 INFO L482 AbstractCegarLoop]: Abstraction has 4188 states and 11653 transitions. [2021-06-04 21:48:57,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:57,071 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 11653 transitions. [2021-06-04 21:48:57,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:48:57,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:57,075 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:57,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable363 [2021-06-04 21:48:57,276 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:57,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:57,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1455326697, now seen corresponding path program 356 times [2021-06-04 21:48:57,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:57,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107721352] [2021-06-04 21:48:57,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:57,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:57,606 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:57,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:57,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107721352] [2021-06-04 21:48:57,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107721352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:57,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502833215] [2021-06-04 21:48:57,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:57,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:48:57,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:57,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:48:57,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:57,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502833215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:57,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:57,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-04 21:48:57,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709419675] [2021-06-04 21:48:57,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:48:57,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:57,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:48:57,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:48:57,888 INFO L87 Difference]: Start difference. First operand 4188 states and 11653 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:58,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:58,898 INFO L93 Difference]: Finished difference Result 6106 states and 15692 transitions. [2021-06-04 21:48:58,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-04 21:48:58,898 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-04 21:48:58,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:58,903 INFO L225 Difference]: With dead ends: 6106 [2021-06-04 21:48:58,903 INFO L226 Difference]: Without dead ends: 5836 [2021-06-04 21:48:58,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 1047.9ms TimeCoverageRelationStatistics Valid=1291, Invalid=4259, Unknown=0, NotChecked=0, Total=5550 [2021-06-04 21:48:58,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5836 states. [2021-06-04 21:48:58,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5836 to 4263. [2021-06-04 21:48:58,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4263 states, 4262 states have (on average 2.786954481464101) internal successors, (11878), 4262 states have internal predecessors, (11878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:58,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4263 states to 4263 states and 11878 transitions. [2021-06-04 21:48:58,953 INFO L78 Accepts]: Start accepts. Automaton has 4263 states and 11878 transitions. Word has length 165 [2021-06-04 21:48:58,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:58,953 INFO L482 AbstractCegarLoop]: Abstraction has 4263 states and 11878 transitions. [2021-06-04 21:48:58,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:58,953 INFO L276 IsEmpty]: Start isEmpty. Operand 4263 states and 11878 transitions. [2021-06-04 21:48:58,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:48:58,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:58,956 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:48:59,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:59,157 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:59,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:59,157 INFO L82 PathProgramCache]: Analyzing trace with hash -159626793, now seen corresponding path program 357 times [2021-06-04 21:48:59,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:59,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956221433] [2021-06-04 21:48:59,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:59,462 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:59,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:59,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956221433] [2021-06-04 21:48:59,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956221433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:59,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042542986] [2021-06-04 21:48:59,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:59,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-04 21:48:59,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:59,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:48:59,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:59,743 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:59,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042542986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:59,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:59,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-04 21:48:59,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412760234] [2021-06-04 21:48:59,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:59,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:59,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:59,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:59,744 INFO L87 Difference]: Start difference. First operand 4263 states and 11878 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:00,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:00,604 INFO L93 Difference]: Finished difference Result 6131 states and 15817 transitions. [2021-06-04 21:49:00,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-04 21:49:00,604 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-04 21:49:00,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:00,610 INFO L225 Difference]: With dead ends: 6131 [2021-06-04 21:49:00,610 INFO L226 Difference]: Without dead ends: 5861 [2021-06-04 21:49:00,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 914.1ms TimeCoverageRelationStatistics Valid=1339, Invalid=4211, Unknown=0, NotChecked=0, Total=5550 [2021-06-04 21:49:00,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5861 states. [2021-06-04 21:49:00,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5861 to 4338. [2021-06-04 21:49:00,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4338 states, 4337 states have (on average 2.790638690338944) internal successors, (12103), 4337 states have internal predecessors, (12103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:00,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4338 states to 4338 states and 12103 transitions. [2021-06-04 21:49:00,664 INFO L78 Accepts]: Start accepts. Automaton has 4338 states and 12103 transitions. Word has length 165 [2021-06-04 21:49:00,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:00,664 INFO L482 AbstractCegarLoop]: Abstraction has 4338 states and 12103 transitions. [2021-06-04 21:49:00,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:00,664 INFO L276 IsEmpty]: Start isEmpty. Operand 4338 states and 12103 transitions. [2021-06-04 21:49:00,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:49:00,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:00,668 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:00,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-04 21:49:00,869 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:00,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:00,869 INFO L82 PathProgramCache]: Analyzing trace with hash -540070745, now seen corresponding path program 358 times [2021-06-04 21:49:00,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:00,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332972544] [2021-06-04 21:49:00,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:01,185 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:01,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:01,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332972544] [2021-06-04 21:49:01,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332972544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:01,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025212684] [2021-06-04 21:49:01,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:01,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:49:01,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:01,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:49:01,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:01,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025212684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:01,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:01,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-04 21:49:01,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947776713] [2021-06-04 21:49:01,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:01,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:01,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:01,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:01,492 INFO L87 Difference]: Start difference. First operand 4338 states and 12103 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:02,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:02,517 INFO L93 Difference]: Finished difference Result 6156 states and 15942 transitions. [2021-06-04 21:49:02,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:49:02,517 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-04 21:49:02,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:02,523 INFO L225 Difference]: With dead ends: 6156 [2021-06-04 21:49:02,523 INFO L226 Difference]: Without dead ends: 5886 [2021-06-04 21:49:02,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 1065.4ms TimeCoverageRelationStatistics Valid=1369, Invalid=4483, Unknown=0, NotChecked=0, Total=5852 [2021-06-04 21:49:02,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5886 states. [2021-06-04 21:49:02,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5886 to 4413. [2021-06-04 21:49:02,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4413 states, 4412 states have (on average 2.7941976427923843) internal successors, (12328), 4412 states have internal predecessors, (12328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:02,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4413 states to 4413 states and 12328 transitions. [2021-06-04 21:49:02,579 INFO L78 Accepts]: Start accepts. Automaton has 4413 states and 12328 transitions. Word has length 165 [2021-06-04 21:49:02,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:02,579 INFO L482 AbstractCegarLoop]: Abstraction has 4413 states and 12328 transitions. [2021-06-04 21:49:02,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:02,580 INFO L276 IsEmpty]: Start isEmpty. Operand 4413 states and 12328 transitions. [2021-06-04 21:49:02,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:49:02,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:02,583 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:02,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-04 21:49:02,784 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:02,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:02,784 INFO L82 PathProgramCache]: Analyzing trace with hash 84304405, now seen corresponding path program 359 times [2021-06-04 21:49:02,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:02,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029535584] [2021-06-04 21:49:02,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:03,086 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:03,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:03,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029535584] [2021-06-04 21:49:03,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029535584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:03,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418655290] [2021-06-04 21:49:03,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:03,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-04 21:49:03,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:03,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:49:03,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:03,354 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:03,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418655290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:03,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:03,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-04 21:49:03,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382016313] [2021-06-04 21:49:03,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:49:03,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:03,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:49:03,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:49:03,355 INFO L87 Difference]: Start difference. First operand 4413 states and 12328 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:04,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:04,287 INFO L93 Difference]: Finished difference Result 6181 states and 16067 transitions. [2021-06-04 21:49:04,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-04 21:49:04,288 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-04 21:49:04,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:04,292 INFO L225 Difference]: With dead ends: 6181 [2021-06-04 21:49:04,292 INFO L226 Difference]: Without dead ends: 5911 [2021-06-04 21:49:04,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 964.6ms TimeCoverageRelationStatistics Valid=1431, Invalid=4421, Unknown=0, NotChecked=0, Total=5852 [2021-06-04 21:49:04,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2021-06-04 21:49:04,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 4488. [2021-06-04 21:49:04,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4488 states, 4487 states have (on average 2.797637619790506) internal successors, (12553), 4487 states have internal predecessors, (12553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:04,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 12553 transitions. [2021-06-04 21:49:04,345 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 12553 transitions. Word has length 165 [2021-06-04 21:49:04,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:04,345 INFO L482 AbstractCegarLoop]: Abstraction has 4488 states and 12553 transitions. [2021-06-04 21:49:04,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:04,345 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 12553 transitions. [2021-06-04 21:49:04,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:49:04,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:04,349 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:04,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-06-04 21:49:04,549 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:04,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:04,550 INFO L82 PathProgramCache]: Analyzing trace with hash 893356261, now seen corresponding path program 360 times [2021-06-04 21:49:04,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:04,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93955226] [2021-06-04 21:49:04,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:04,860 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:04,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:04,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93955226] [2021-06-04 21:49:04,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93955226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:04,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998216571] [2021-06-04 21:49:04,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:04,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-04 21:49:04,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:04,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:49:04,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:05,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998216571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:05,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:05,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-04 21:49:05,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42867994] [2021-06-04 21:49:05,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:05,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:05,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:05,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:05,157 INFO L87 Difference]: Start difference. First operand 4488 states and 12553 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:06,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:06,265 INFO L93 Difference]: Finished difference Result 6206 states and 16192 transitions. [2021-06-04 21:49:06,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-04 21:49:06,265 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-04 21:49:06,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:06,272 INFO L225 Difference]: With dead ends: 6206 [2021-06-04 21:49:06,272 INFO L226 Difference]: Without dead ends: 5936 [2021-06-04 21:49:06,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1125.8ms TimeCoverageRelationStatistics Valid=1463, Invalid=4699, Unknown=0, NotChecked=0, Total=6162 [2021-06-04 21:49:06,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5936 states. [2021-06-04 21:49:06,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5936 to 4563. [2021-06-04 21:49:06,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4562 states have (on average 2.800964489259097) internal successors, (12778), 4562 states have internal predecessors, (12778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:06,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 12778 transitions. [2021-06-04 21:49:06,333 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 12778 transitions. Word has length 165 [2021-06-04 21:49:06,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:06,333 INFO L482 AbstractCegarLoop]: Abstraction has 4563 states and 12778 transitions. [2021-06-04 21:49:06,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:06,334 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 12778 transitions. [2021-06-04 21:49:06,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:49:06,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:06,338 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:06,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-06-04 21:49:06,547 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:06,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:06,548 INFO L82 PathProgramCache]: Analyzing trace with hash -498593837, now seen corresponding path program 361 times [2021-06-04 21:49:06,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:06,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059457197] [2021-06-04 21:49:06,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:06,883 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:06,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:06,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059457197] [2021-06-04 21:49:06,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059457197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:06,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109607922] [2021-06-04 21:49:06,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:06,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:49:06,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:07,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109607922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:07,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:07,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-04 21:49:07,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641789174] [2021-06-04 21:49:07,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:49:07,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:07,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:49:07,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:49:07,171 INFO L87 Difference]: Start difference. First operand 4563 states and 12778 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:08,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:08,131 INFO L93 Difference]: Finished difference Result 6231 states and 16317 transitions. [2021-06-04 21:49:08,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-04 21:49:08,131 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-04 21:49:08,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:08,137 INFO L225 Difference]: With dead ends: 6231 [2021-06-04 21:49:08,137 INFO L226 Difference]: Without dead ends: 5961 [2021-06-04 21:49:08,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 1009.1ms TimeCoverageRelationStatistics Valid=1539, Invalid=4623, Unknown=0, NotChecked=0, Total=6162 [2021-06-04 21:49:08,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5961 states. [2021-06-04 21:49:08,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5961 to 4638. [2021-06-04 21:49:08,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4638 states, 4637 states have (on average 2.8041837394867373) internal successors, (13003), 4637 states have internal predecessors, (13003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:08,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4638 states to 4638 states and 13003 transitions. [2021-06-04 21:49:08,196 INFO L78 Accepts]: Start accepts. Automaton has 4638 states and 13003 transitions. Word has length 165 [2021-06-04 21:49:08,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:08,196 INFO L482 AbstractCegarLoop]: Abstraction has 4638 states and 13003 transitions. [2021-06-04 21:49:08,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:08,197 INFO L276 IsEmpty]: Start isEmpty. Operand 4638 states and 13003 transitions. [2021-06-04 21:49:08,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:49:08,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:08,200 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:08,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:08,401 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:08,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:08,401 INFO L82 PathProgramCache]: Analyzing trace with hash -743671133, now seen corresponding path program 362 times [2021-06-04 21:49:08,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:08,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801926023] [2021-06-04 21:49:08,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:08,703 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:08,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:08,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801926023] [2021-06-04 21:49:08,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801926023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:08,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161864559] [2021-06-04 21:49:08,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:08,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:49:08,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:08,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:49:08,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:08,982 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:08,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161864559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:08,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:08,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-04 21:49:08,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048699079] [2021-06-04 21:49:08,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:08,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:08,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:08,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:08,984 INFO L87 Difference]: Start difference. First operand 4638 states and 13003 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:10,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:10,145 INFO L93 Difference]: Finished difference Result 6256 states and 16442 transitions. [2021-06-04 21:49:10,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-04 21:49:10,145 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-04 21:49:10,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:10,151 INFO L225 Difference]: With dead ends: 6256 [2021-06-04 21:49:10,151 INFO L226 Difference]: Without dead ends: 5986 [2021-06-04 21:49:10,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 1171.5ms TimeCoverageRelationStatistics Valid=1573, Invalid=4907, Unknown=0, NotChecked=0, Total=6480 [2021-06-04 21:49:10,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5986 states. [2021-06-04 21:49:10,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5986 to 4713. [2021-06-04 21:49:10,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4713 states, 4712 states have (on average 2.807300509337861) internal successors, (13228), 4712 states have internal predecessors, (13228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:10,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4713 states to 4713 states and 13228 transitions. [2021-06-04 21:49:10,210 INFO L78 Accepts]: Start accepts. Automaton has 4713 states and 13228 transitions. Word has length 165 [2021-06-04 21:49:10,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:10,210 INFO L482 AbstractCegarLoop]: Abstraction has 4713 states and 13228 transitions. [2021-06-04 21:49:10,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:10,211 INFO L276 IsEmpty]: Start isEmpty. Operand 4713 states and 13228 transitions. [2021-06-04 21:49:10,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:49:10,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:10,215 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:10,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2021-06-04 21:49:10,415 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:10,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:10,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1120521455, now seen corresponding path program 363 times [2021-06-04 21:49:10,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:10,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968879089] [2021-06-04 21:49:10,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:10,712 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:10,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:10,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968879089] [2021-06-04 21:49:10,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968879089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:10,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110538619] [2021-06-04 21:49:10,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:10,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-04 21:49:10,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:10,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:49:10,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:10,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110538619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:10,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:10,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-04 21:49:10,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202417978] [2021-06-04 21:49:10,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:49:10,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:10,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:49:10,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:49:10,987 INFO L87 Difference]: Start difference. First operand 4713 states and 13228 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:12,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:12,013 INFO L93 Difference]: Finished difference Result 6281 states and 16567 transitions. [2021-06-04 21:49:12,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-04 21:49:12,013 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-04 21:49:12,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:12,020 INFO L225 Difference]: With dead ends: 6281 [2021-06-04 21:49:12,020 INFO L226 Difference]: Without dead ends: 6011 [2021-06-04 21:49:12,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1723 ImplicationChecksByTransitivity, 1012.9ms TimeCoverageRelationStatistics Valid=1663, Invalid=4817, Unknown=0, NotChecked=0, Total=6480 [2021-06-04 21:49:12,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2021-06-04 21:49:12,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 4788. [2021-06-04 21:49:12,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4788 states, 4787 states have (on average 2.810319615625653) internal successors, (13453), 4787 states have internal predecessors, (13453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:12,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4788 states to 4788 states and 13453 transitions. [2021-06-04 21:49:12,089 INFO L78 Accepts]: Start accepts. Automaton has 4788 states and 13453 transitions. Word has length 165 [2021-06-04 21:49:12,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:12,089 INFO L482 AbstractCegarLoop]: Abstraction has 4788 states and 13453 transitions. [2021-06-04 21:49:12,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:12,089 INFO L276 IsEmpty]: Start isEmpty. Operand 4788 states and 13453 transitions. [2021-06-04 21:49:12,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:49:12,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:12,094 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:12,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:12,294 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:12,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:12,295 INFO L82 PathProgramCache]: Analyzing trace with hash 206234081, now seen corresponding path program 364 times [2021-06-04 21:49:12,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:12,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561357773] [2021-06-04 21:49:12,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:12,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:12,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561357773] [2021-06-04 21:49:12,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561357773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:12,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396529018] [2021-06-04 21:49:12,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:12,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:49:12,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:12,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:49:12,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:12,899 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:12,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396529018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:12,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:12,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-04 21:49:12,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873818489] [2021-06-04 21:49:12,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:12,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:12,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:12,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:12,900 INFO L87 Difference]: Start difference. First operand 4788 states and 13453 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:14,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:14,162 INFO L93 Difference]: Finished difference Result 6306 states and 16692 transitions. [2021-06-04 21:49:14,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-04 21:49:14,162 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-04 21:49:14,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:14,169 INFO L225 Difference]: With dead ends: 6306 [2021-06-04 21:49:14,169 INFO L226 Difference]: Without dead ends: 6036 [2021-06-04 21:49:14,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 1203.8ms TimeCoverageRelationStatistics Valid=1699, Invalid=5107, Unknown=0, NotChecked=0, Total=6806 [2021-06-04 21:49:14,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6036 states. [2021-06-04 21:49:14,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6036 to 4863. [2021-06-04 21:49:14,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4863 states, 4862 states have (on average 2.8132455779514602) internal successors, (13678), 4862 states have internal predecessors, (13678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:14,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4863 states to 4863 states and 13678 transitions. [2021-06-04 21:49:14,232 INFO L78 Accepts]: Start accepts. Automaton has 4863 states and 13678 transitions. Word has length 165 [2021-06-04 21:49:14,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:14,232 INFO L482 AbstractCegarLoop]: Abstraction has 4863 states and 13678 transitions. [2021-06-04 21:49:14,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:14,233 INFO L276 IsEmpty]: Start isEmpty. Operand 4863 states and 13678 transitions. [2021-06-04 21:49:14,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:49:14,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:14,237 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:14,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:14,437 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:14,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:14,437 INFO L82 PathProgramCache]: Analyzing trace with hash 660450255, now seen corresponding path program 365 times [2021-06-04 21:49:14,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:14,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698533535] [2021-06-04 21:49:14,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:14,734 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:14,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:14,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698533535] [2021-06-04 21:49:14,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698533535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:14,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453549967] [2021-06-04 21:49:14,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:14,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-04 21:49:14,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:14,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:49:14,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:14,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453549967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:14,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:14,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-04 21:49:14,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913327686] [2021-06-04 21:49:14,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:49:14,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:14,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:49:14,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:49:14,997 INFO L87 Difference]: Start difference. First operand 4863 states and 13678 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:16,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:16,047 INFO L93 Difference]: Finished difference Result 6331 states and 16817 transitions. [2021-06-04 21:49:16,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-04 21:49:16,047 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-04 21:49:16,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:16,052 INFO L225 Difference]: With dead ends: 6331 [2021-06-04 21:49:16,053 INFO L226 Difference]: Without dead ends: 6061 [2021-06-04 21:49:16,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1854 ImplicationChecksByTransitivity, 1062.0ms TimeCoverageRelationStatistics Valid=1803, Invalid=5003, Unknown=0, NotChecked=0, Total=6806 [2021-06-04 21:49:16,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-06-04 21:49:16,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 4938. [2021-06-04 21:49:16,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4938 states, 4937 states have (on average 2.8160826412801296) internal successors, (13903), 4937 states have internal predecessors, (13903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:16,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4938 states to 4938 states and 13903 transitions. [2021-06-04 21:49:16,114 INFO L78 Accepts]: Start accepts. Automaton has 4938 states and 13903 transitions. Word has length 165 [2021-06-04 21:49:16,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:16,114 INFO L482 AbstractCegarLoop]: Abstraction has 4938 states and 13903 transitions. [2021-06-04 21:49:16,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:16,115 INFO L276 IsEmpty]: Start isEmpty. Operand 4938 states and 13903 transitions. [2021-06-04 21:49:16,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:49:16,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:16,119 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:16,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:16,319 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:16,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:16,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1659346591, now seen corresponding path program 366 times [2021-06-04 21:49:16,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:16,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339484568] [2021-06-04 21:49:16,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:16,618 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:16,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:16,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339484568] [2021-06-04 21:49:16,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339484568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:16,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768476792] [2021-06-04 21:49:16,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:16,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-04 21:49:16,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:16,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:49:16,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:16,906 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:16,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768476792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:16,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:16,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-04 21:49:16,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358695190] [2021-06-04 21:49:16,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:16,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:16,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:16,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:16,907 INFO L87 Difference]: Start difference. First operand 4938 states and 13903 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:18,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:18,185 INFO L93 Difference]: Finished difference Result 6356 states and 16942 transitions. [2021-06-04 21:49:18,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-04 21:49:18,185 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-04 21:49:18,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:18,191 INFO L225 Difference]: With dead ends: 6356 [2021-06-04 21:49:18,191 INFO L226 Difference]: Without dead ends: 6086 [2021-06-04 21:49:18,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1899 ImplicationChecksByTransitivity, 1252.7ms TimeCoverageRelationStatistics Valid=1841, Invalid=5299, Unknown=0, NotChecked=0, Total=7140 [2021-06-04 21:49:18,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2021-06-04 21:49:18,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 5013. [2021-06-04 21:49:18,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5013 states, 5012 states have (on average 2.818834796488428) internal successors, (14128), 5012 states have internal predecessors, (14128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:18,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5013 states to 5013 states and 14128 transitions. [2021-06-04 21:49:18,275 INFO L78 Accepts]: Start accepts. Automaton has 5013 states and 14128 transitions. Word has length 165 [2021-06-04 21:49:18,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:18,275 INFO L482 AbstractCegarLoop]: Abstraction has 5013 states and 14128 transitions. [2021-06-04 21:49:18,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:18,275 INFO L276 IsEmpty]: Start isEmpty. Operand 5013 states and 14128 transitions. [2021-06-04 21:49:18,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:49:18,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:18,279 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:18,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:18,480 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:18,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:18,480 INFO L82 PathProgramCache]: Analyzing trace with hash -219981299, now seen corresponding path program 367 times [2021-06-04 21:49:18,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:18,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064855945] [2021-06-04 21:49:18,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:18,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:18,778 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:18,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:18,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064855945] [2021-06-04 21:49:18,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064855945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:18,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884695972] [2021-06-04 21:49:18,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:18,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:49:18,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:19,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884695972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:19,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:19,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-04 21:49:19,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351776330] [2021-06-04 21:49:19,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:49:19,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:19,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:49:19,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:49:19,035 INFO L87 Difference]: Start difference. First operand 5013 states and 14128 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:20,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:20,132 INFO L93 Difference]: Finished difference Result 6381 states and 17067 transitions. [2021-06-04 21:49:20,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-04 21:49:20,132 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-04 21:49:20,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:20,139 INFO L225 Difference]: With dead ends: 6381 [2021-06-04 21:49:20,139 INFO L226 Difference]: Without dead ends: 6111 [2021-06-04 21:49:20,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1989 ImplicationChecksByTransitivity, 1084.6ms TimeCoverageRelationStatistics Valid=1959, Invalid=5181, Unknown=0, NotChecked=0, Total=7140 [2021-06-04 21:49:20,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6111 states. [2021-06-04 21:49:20,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6111 to 5088. [2021-06-04 21:49:20,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5088 states, 5087 states have (on average 2.821505799095734) internal successors, (14353), 5087 states have internal predecessors, (14353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:20,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 14353 transitions. [2021-06-04 21:49:20,205 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 14353 transitions. Word has length 165 [2021-06-04 21:49:20,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:20,205 INFO L482 AbstractCegarLoop]: Abstraction has 5088 states and 14353 transitions. [2021-06-04 21:49:20,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:20,205 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 14353 transitions. [2021-06-04 21:49:20,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:49:20,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:20,209 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:20,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-04 21:49:20,410 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:20,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:20,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1810338013, now seen corresponding path program 368 times [2021-06-04 21:49:20,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:20,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207492195] [2021-06-04 21:49:20,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:20,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:20,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:20,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207492195] [2021-06-04 21:49:20,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207492195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:20,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76990065] [2021-06-04 21:49:20,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:20,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:49:20,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:20,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:49:20,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:21,016 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:21,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76990065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:21,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:21,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-04 21:49:21,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291142518] [2021-06-04 21:49:21,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:21,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:21,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:21,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:21,018 INFO L87 Difference]: Start difference. First operand 5088 states and 14353 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:22,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:22,339 INFO L93 Difference]: Finished difference Result 6406 states and 17192 transitions. [2021-06-04 21:49:22,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-04 21:49:22,339 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-04 21:49:22,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:22,345 INFO L225 Difference]: With dead ends: 6406 [2021-06-04 21:49:22,345 INFO L226 Difference]: Without dead ends: 6136 [2021-06-04 21:49:22,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 1305.2ms TimeCoverageRelationStatistics Valid=1999, Invalid=5483, Unknown=0, NotChecked=0, Total=7482 [2021-06-04 21:49:22,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6136 states. [2021-06-04 21:49:22,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6136 to 5163. [2021-06-04 21:49:22,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5163 states, 5162 states have (on average 2.824099186361875) internal successors, (14578), 5162 states have internal predecessors, (14578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:22,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5163 states to 5163 states and 14578 transitions. [2021-06-04 21:49:22,415 INFO L78 Accepts]: Start accepts. Automaton has 5163 states and 14578 transitions. Word has length 165 [2021-06-04 21:49:22,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:22,415 INFO L482 AbstractCegarLoop]: Abstraction has 5163 states and 14578 transitions. [2021-06-04 21:49:22,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:22,415 INFO L276 IsEmpty]: Start isEmpty. Operand 5163 states and 14578 transitions. [2021-06-04 21:49:22,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:49:22,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:22,420 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:22,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-04 21:49:22,620 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:22,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:22,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1870389813, now seen corresponding path program 369 times [2021-06-04 21:49:22,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:22,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499156572] [2021-06-04 21:49:22,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:22,917 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:22,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:22,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499156572] [2021-06-04 21:49:22,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499156572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:22,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56746682] [2021-06-04 21:49:22,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:22,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-04 21:49:22,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:23,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:49:23,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:23,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56746682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:23,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:23,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-04 21:49:23,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140621525] [2021-06-04 21:49:23,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:49:23,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:23,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:49:23,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:49:23,187 INFO L87 Difference]: Start difference. First operand 5163 states and 14578 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:24,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:24,337 INFO L93 Difference]: Finished difference Result 6431 states and 17317 transitions. [2021-06-04 21:49:24,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-04 21:49:24,338 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-04 21:49:24,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:24,343 INFO L225 Difference]: With dead ends: 6431 [2021-06-04 21:49:24,344 INFO L226 Difference]: Without dead ends: 6161 [2021-06-04 21:49:24,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 1129.2ms TimeCoverageRelationStatistics Valid=2131, Invalid=5351, Unknown=0, NotChecked=0, Total=7482 [2021-06-04 21:49:24,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6161 states. [2021-06-04 21:49:24,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6161 to 5238. [2021-06-04 21:49:24,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5238 states, 5237 states have (on average 2.8266182929157915) internal successors, (14803), 5237 states have internal predecessors, (14803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:24,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5238 states to 5238 states and 14803 transitions. [2021-06-04 21:49:24,410 INFO L78 Accepts]: Start accepts. Automaton has 5238 states and 14803 transitions. Word has length 165 [2021-06-04 21:49:24,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:24,410 INFO L482 AbstractCegarLoop]: Abstraction has 5238 states and 14803 transitions. [2021-06-04 21:49:24,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:24,410 INFO L276 IsEmpty]: Start isEmpty. Operand 5238 states and 14803 transitions. [2021-06-04 21:49:24,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:49:24,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:24,415 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:24,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-04 21:49:24,615 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:24,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:24,616 INFO L82 PathProgramCache]: Analyzing trace with hash 709335195, now seen corresponding path program 370 times [2021-06-04 21:49:24,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:24,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262659642] [2021-06-04 21:49:24,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:24,916 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:24,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:24,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262659642] [2021-06-04 21:49:24,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262659642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:24,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688993018] [2021-06-04 21:49:24,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:24,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:49:24,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:24,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:49:24,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:25,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688993018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:25,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:25,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-04 21:49:25,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350310009] [2021-06-04 21:49:25,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:25,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:25,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:25,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:25,190 INFO L87 Difference]: Start difference. First operand 5238 states and 14803 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:26,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:26,591 INFO L93 Difference]: Finished difference Result 6516 states and 17607 transitions. [2021-06-04 21:49:26,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-04 21:49:26,592 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-04 21:49:26,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:26,598 INFO L225 Difference]: With dead ends: 6516 [2021-06-04 21:49:26,599 INFO L226 Difference]: Without dead ends: 6246 [2021-06-04 21:49:26,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2179 ImplicationChecksByTransitivity, 1357.8ms TimeCoverageRelationStatistics Valid=2173, Invalid=5659, Unknown=0, NotChecked=0, Total=7832 [2021-06-04 21:49:26,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6246 states. [2021-06-04 21:49:26,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6246 to 5313. [2021-06-04 21:49:26,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5313 states, 5312 states have (on average 2.8328313253012047) internal successors, (15048), 5312 states have internal predecessors, (15048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:26,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5313 states to 5313 states and 15048 transitions. [2021-06-04 21:49:26,687 INFO L78 Accepts]: Start accepts. Automaton has 5313 states and 15048 transitions. Word has length 165 [2021-06-04 21:49:26,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:26,687 INFO L482 AbstractCegarLoop]: Abstraction has 5313 states and 15048 transitions. [2021-06-04 21:49:26,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:26,688 INFO L276 IsEmpty]: Start isEmpty. Operand 5313 states and 15048 transitions. [2021-06-04 21:49:26,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:49:26,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:26,692 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:26,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-04 21:49:26,893 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:26,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:26,893 INFO L82 PathProgramCache]: Analyzing trace with hash -323312407, now seen corresponding path program 371 times [2021-06-04 21:49:26,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:26,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889448997] [2021-06-04 21:49:26,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:26,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:27,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:27,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889448997] [2021-06-04 21:49:27,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889448997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:27,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436660795] [2021-06-04 21:49:27,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:27,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-04 21:49:27,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:27,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:49:27,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:27,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436660795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:27,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:27,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-04 21:49:27,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581731907] [2021-06-04 21:49:27,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:49:27,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:27,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:49:27,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:49:27,477 INFO L87 Difference]: Start difference. First operand 5313 states and 15048 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:28,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:28,666 INFO L93 Difference]: Finished difference Result 7258 states and 19731 transitions. [2021-06-04 21:49:28,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-04 21:49:28,666 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-04 21:49:28,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:28,674 INFO L225 Difference]: With dead ends: 7258 [2021-06-04 21:49:28,674 INFO L226 Difference]: Without dead ends: 6988 [2021-06-04 21:49:28,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2270 ImplicationChecksByTransitivity, 1170.5ms TimeCoverageRelationStatistics Valid=2320, Invalid=5512, Unknown=0, NotChecked=0, Total=7832 [2021-06-04 21:49:28,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6988 states. [2021-06-04 21:49:28,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6988 to 5493. [2021-06-04 21:49:28,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5493 states, 5492 states have (on average 2.841769847050255) internal successors, (15607), 5492 states have internal predecessors, (15607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:28,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5493 states to 5493 states and 15607 transitions. [2021-06-04 21:49:28,743 INFO L78 Accepts]: Start accepts. Automaton has 5493 states and 15607 transitions. Word has length 165 [2021-06-04 21:49:28,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:28,743 INFO L482 AbstractCegarLoop]: Abstraction has 5493 states and 15607 transitions. [2021-06-04 21:49:28,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:28,743 INFO L276 IsEmpty]: Start isEmpty. Operand 5493 states and 15607 transitions. [2021-06-04 21:49:28,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:49:28,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:28,748 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:28,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:28,948 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:28,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:28,948 INFO L82 PathProgramCache]: Analyzing trace with hash -300969157, now seen corresponding path program 372 times [2021-06-04 21:49:28,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:28,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540833817] [2021-06-04 21:49:28,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:29,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:29,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540833817] [2021-06-04 21:49:29,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540833817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:29,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307567104] [2021-06-04 21:49:29,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:29,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-04 21:49:29,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:29,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:49:29,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:29,562 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:29,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307567104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:29,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:29,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-04 21:49:29,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90808591] [2021-06-04 21:49:29,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:29,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:29,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:29,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:29,563 INFO L87 Difference]: Start difference. First operand 5493 states and 15607 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:30,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:30,954 INFO L93 Difference]: Finished difference Result 6720 states and 18381 transitions. [2021-06-04 21:49:30,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-04 21:49:30,954 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-06-04 21:49:30,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:30,961 INFO L225 Difference]: With dead ends: 6720 [2021-06-04 21:49:30,961 INFO L226 Difference]: Without dead ends: 6231 [2021-06-04 21:49:30,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 1376.0ms TimeCoverageRelationStatistics Valid=2366, Invalid=5824, Unknown=0, NotChecked=0, Total=8190 [2021-06-04 21:49:30,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6231 states. [2021-06-04 21:49:31,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6231 to 3434. [2021-06-04 21:49:31,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 2.7427905621905038) internal successors, (9416), 3433 states have internal predecessors, (9416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:31,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 9416 transitions. [2021-06-04 21:49:31,008 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 9416 transitions. Word has length 165 [2021-06-04 21:49:31,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:31,008 INFO L482 AbstractCegarLoop]: Abstraction has 3434 states and 9416 transitions. [2021-06-04 21:49:31,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:31,008 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 9416 transitions. [2021-06-04 21:49:31,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:31,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:31,011 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:31,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-06-04 21:49:31,212 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:31,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:31,212 INFO L82 PathProgramCache]: Analyzing trace with hash 33638321, now seen corresponding path program 373 times [2021-06-04 21:49:31,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:31,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058883919] [2021-06-04 21:49:31,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:31,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:31,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:31,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058883919] [2021-06-04 21:49:31,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058883919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:31,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423902121] [2021-06-04 21:49:31,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:31,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:49:31,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:31,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423902121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:31,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:31,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-04 21:49:31,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707453950] [2021-06-04 21:49:31,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:49:31,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:31,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:49:31,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=976, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:49:31,903 INFO L87 Difference]: Start difference. First operand 3434 states and 9416 transitions. Second operand has 36 states, 36 states have (on average 5.5) internal successors, (198), 36 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:32,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:32,689 INFO L93 Difference]: Finished difference Result 4774 states and 12416 transitions. [2021-06-04 21:49:32,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:49:32,690 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.5) internal successors, (198), 36 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:49:32,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:32,694 INFO L225 Difference]: With dead ends: 4774 [2021-06-04 21:49:32,694 INFO L226 Difference]: Without dead ends: 4440 [2021-06-04 21:49:32,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 929.7ms TimeCoverageRelationStatistics Valid=1320, Invalid=3510, Unknown=0, NotChecked=0, Total=4830 [2021-06-04 21:49:32,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4440 states. [2021-06-04 21:49:32,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4440 to 3519. [2021-06-04 21:49:32,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3519 states, 3518 states have (on average 2.72484366117112) internal successors, (9586), 3518 states have internal predecessors, (9586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:32,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3519 states to 3519 states and 9586 transitions. [2021-06-04 21:49:32,732 INFO L78 Accepts]: Start accepts. Automaton has 3519 states and 9586 transitions. Word has length 170 [2021-06-04 21:49:32,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:32,732 INFO L482 AbstractCegarLoop]: Abstraction has 3519 states and 9586 transitions. [2021-06-04 21:49:32,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.5) internal successors, (198), 36 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:32,732 INFO L276 IsEmpty]: Start isEmpty. Operand 3519 states and 9586 transitions. [2021-06-04 21:49:32,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:32,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:32,735 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:32,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:32,937 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:32,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:32,937 INFO L82 PathProgramCache]: Analyzing trace with hash 117467253, now seen corresponding path program 374 times [2021-06-04 21:49:32,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:32,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116478607] [2021-06-04 21:49:32,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:33,325 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:33,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:33,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116478607] [2021-06-04 21:49:33,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116478607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:33,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486446642] [2021-06-04 21:49:33,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:33,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:49:33,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:33,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:33,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:33,608 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:33,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486446642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:33,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:33,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-04 21:49:33,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669133923] [2021-06-04 21:49:33,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:33,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:33,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:33,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:33,610 INFO L87 Difference]: Start difference. First operand 3519 states and 9586 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:34,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:34,255 INFO L93 Difference]: Finished difference Result 6096 states and 14997 transitions. [2021-06-04 21:49:34,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:49:34,256 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:49:34,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:34,263 INFO L225 Difference]: With dead ends: 6096 [2021-06-04 21:49:34,263 INFO L226 Difference]: Without dead ends: 5826 [2021-06-04 21:49:34,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 818.3ms TimeCoverageRelationStatistics Valid=1132, Invalid=2900, Unknown=0, NotChecked=0, Total=4032 [2021-06-04 21:49:34,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5826 states. [2021-06-04 21:49:34,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5826 to 3663. [2021-06-04 21:49:34,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3663 states, 3662 states have (on average 2.7315674494811577) internal successors, (10003), 3662 states have internal predecessors, (10003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:34,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 10003 transitions. [2021-06-04 21:49:34,310 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 10003 transitions. Word has length 170 [2021-06-04 21:49:34,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:34,310 INFO L482 AbstractCegarLoop]: Abstraction has 3663 states and 10003 transitions. [2021-06-04 21:49:34,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:34,310 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 10003 transitions. [2021-06-04 21:49:34,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:34,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:34,314 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:34,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:34,515 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:34,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:34,523 INFO L82 PathProgramCache]: Analyzing trace with hash 815182661, now seen corresponding path program 375 times [2021-06-04 21:49:34,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:34,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031733530] [2021-06-04 21:49:34,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:34,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:34,933 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:34,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:34,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031733530] [2021-06-04 21:49:34,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031733530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:34,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430084465] [2021-06-04 21:49:34,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:35,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-04 21:49:35,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:35,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:35,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:35,283 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:35,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430084465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:35,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:35,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-04 21:49:35,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181705169] [2021-06-04 21:49:35,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:49:35,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:35,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:49:35,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:49:35,284 INFO L87 Difference]: Start difference. First operand 3663 states and 10003 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:36,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:36,011 INFO L93 Difference]: Finished difference Result 6056 states and 14992 transitions. [2021-06-04 21:49:36,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:49:36,012 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:49:36,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:36,018 INFO L225 Difference]: With dead ends: 6056 [2021-06-04 21:49:36,018 INFO L226 Difference]: Without dead ends: 5786 [2021-06-04 21:49:36,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 917.7ms TimeCoverageRelationStatistics Valid=1215, Invalid=3341, Unknown=0, NotChecked=0, Total=4556 [2021-06-04 21:49:36,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2021-06-04 21:49:36,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 3738. [2021-06-04 21:49:36,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3738 states, 3737 states have (on average 2.7369547765587368) internal successors, (10228), 3737 states have internal predecessors, (10228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:36,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 10228 transitions. [2021-06-04 21:49:36,069 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 10228 transitions. Word has length 170 [2021-06-04 21:49:36,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:36,069 INFO L482 AbstractCegarLoop]: Abstraction has 3738 states and 10228 transitions. [2021-06-04 21:49:36,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:36,069 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 10228 transitions. [2021-06-04 21:49:36,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:36,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:36,073 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:36,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:36,273 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:36,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:36,274 INFO L82 PathProgramCache]: Analyzing trace with hash -904699981, now seen corresponding path program 376 times [2021-06-04 21:49:36,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:36,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308625955] [2021-06-04 21:49:36,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:36,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:36,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308625955] [2021-06-04 21:49:36,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308625955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:36,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917330067] [2021-06-04 21:49:36,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:36,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:49:36,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:36,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:36,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:36,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917330067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:36,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:36,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-04 21:49:36,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257006479] [2021-06-04 21:49:36,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:36,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:36,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:36,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:36,992 INFO L87 Difference]: Start difference. First operand 3738 states and 10228 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:37,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:37,696 INFO L93 Difference]: Finished difference Result 6106 states and 15167 transitions. [2021-06-04 21:49:37,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:49:37,697 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:49:37,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:37,703 INFO L225 Difference]: With dead ends: 6106 [2021-06-04 21:49:37,703 INFO L226 Difference]: Without dead ends: 5836 [2021-06-04 21:49:37,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 872.7ms TimeCoverageRelationStatistics Valid=1129, Invalid=3161, Unknown=0, NotChecked=0, Total=4290 [2021-06-04 21:49:37,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5836 states. [2021-06-04 21:49:37,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5836 to 3813. [2021-06-04 21:49:37,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 3812 states have (on average 2.742130115424974) internal successors, (10453), 3812 states have internal predecessors, (10453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:37,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 10453 transitions. [2021-06-04 21:49:37,754 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 10453 transitions. Word has length 170 [2021-06-04 21:49:37,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:37,754 INFO L482 AbstractCegarLoop]: Abstraction has 3813 states and 10453 transitions. [2021-06-04 21:49:37,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:37,754 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 10453 transitions. [2021-06-04 21:49:37,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:37,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:37,757 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:37,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:37,958 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:37,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:37,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1406013821, now seen corresponding path program 377 times [2021-06-04 21:49:37,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:37,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899283200] [2021-06-04 21:49:37,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:38,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:38,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899283200] [2021-06-04 21:49:38,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899283200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:38,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551125633] [2021-06-04 21:49:38,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:38,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-04 21:49:38,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:38,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:38,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:38,679 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:38,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551125633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:38,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:38,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-04 21:49:38,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930672546] [2021-06-04 21:49:38,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:49:38,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:38,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:49:38,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:49:38,680 INFO L87 Difference]: Start difference. First operand 3813 states and 10453 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:39,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:39,471 INFO L93 Difference]: Finished difference Result 6131 states and 15292 transitions. [2021-06-04 21:49:39,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:49:39,471 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:49:39,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:39,477 INFO L225 Difference]: With dead ends: 6131 [2021-06-04 21:49:39,477 INFO L226 Difference]: Without dead ends: 5861 [2021-06-04 21:49:39,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 984.8ms TimeCoverageRelationStatistics Valid=1220, Invalid=3610, Unknown=0, NotChecked=0, Total=4830 [2021-06-04 21:49:39,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5861 states. [2021-06-04 21:49:39,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5861 to 3888. [2021-06-04 21:49:39,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3888 states, 3887 states have (on average 2.7471057370722924) internal successors, (10678), 3887 states have internal predecessors, (10678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:39,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3888 states to 3888 states and 10678 transitions. [2021-06-04 21:49:39,525 INFO L78 Accepts]: Start accepts. Automaton has 3888 states and 10678 transitions. Word has length 170 [2021-06-04 21:49:39,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:39,526 INFO L482 AbstractCegarLoop]: Abstraction has 3888 states and 10678 transitions. [2021-06-04 21:49:39,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:39,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3888 states and 10678 transitions. [2021-06-04 21:49:39,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:39,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:39,529 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:39,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:39,729 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:39,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:39,730 INFO L82 PathProgramCache]: Analyzing trace with hash -929518479, now seen corresponding path program 378 times [2021-06-04 21:49:39,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:39,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84133977] [2021-06-04 21:49:39,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:39,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:40,095 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:40,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:40,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84133977] [2021-06-04 21:49:40,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84133977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:40,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458459803] [2021-06-04 21:49:40,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:40,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-04 21:49:40,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:40,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:40,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:40,389 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:40,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458459803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:40,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:40,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-04 21:49:40,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844274950] [2021-06-04 21:49:40,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:40,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:40,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:40,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:40,390 INFO L87 Difference]: Start difference. First operand 3888 states and 10678 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:41,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:41,149 INFO L93 Difference]: Finished difference Result 6156 states and 15417 transitions. [2021-06-04 21:49:41,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:49:41,150 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:49:41,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:41,154 INFO L225 Difference]: With dead ends: 6156 [2021-06-04 21:49:41,154 INFO L226 Difference]: Without dead ends: 5886 [2021-06-04 21:49:41,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 881.4ms TimeCoverageRelationStatistics Valid=1142, Invalid=3414, Unknown=0, NotChecked=0, Total=4556 [2021-06-04 21:49:41,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5886 states. [2021-06-04 21:49:41,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5886 to 3963. [2021-06-04 21:49:41,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3963 states, 3962 states have (on average 2.7518929833417465) internal successors, (10903), 3962 states have internal predecessors, (10903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:41,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3963 states to 3963 states and 10903 transitions. [2021-06-04 21:49:41,200 INFO L78 Accepts]: Start accepts. Automaton has 3963 states and 10903 transitions. Word has length 170 [2021-06-04 21:49:41,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:41,200 INFO L482 AbstractCegarLoop]: Abstraction has 3963 states and 10903 transitions. [2021-06-04 21:49:41,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:41,201 INFO L276 IsEmpty]: Start isEmpty. Operand 3963 states and 10903 transitions. [2021-06-04 21:49:41,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:41,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:41,204 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:41,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 382 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-04 21:49:41,404 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:41,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:41,405 INFO L82 PathProgramCache]: Analyzing trace with hash 537165633, now seen corresponding path program 379 times [2021-06-04 21:49:41,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:41,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211797310] [2021-06-04 21:49:41,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:41,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:41,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211797310] [2021-06-04 21:49:41,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211797310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:41,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217237258] [2021-06-04 21:49:41,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:41,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:41,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:41,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:42,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217237258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:42,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:42,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-04 21:49:42,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586710152] [2021-06-04 21:49:42,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:49:42,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:42,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:49:42,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:49:42,075 INFO L87 Difference]: Start difference. First operand 3963 states and 10903 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:42,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:42,944 INFO L93 Difference]: Finished difference Result 6181 states and 15542 transitions. [2021-06-04 21:49:42,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:49:42,944 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:49:42,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:42,949 INFO L225 Difference]: With dead ends: 6181 [2021-06-04 21:49:42,949 INFO L226 Difference]: Without dead ends: 5911 [2021-06-04 21:49:42,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 997.8ms TimeCoverageRelationStatistics Valid=1241, Invalid=3871, Unknown=0, NotChecked=0, Total=5112 [2021-06-04 21:49:42,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2021-06-04 21:49:42,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 4038. [2021-06-04 21:49:42,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4038 states, 4037 states have (on average 2.7565023532325985) internal successors, (11128), 4037 states have internal predecessors, (11128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:42,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 11128 transitions. [2021-06-04 21:49:43,000 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 11128 transitions. Word has length 170 [2021-06-04 21:49:43,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:43,000 INFO L482 AbstractCegarLoop]: Abstraction has 4038 states and 11128 transitions. [2021-06-04 21:49:43,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:43,000 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 11128 transitions. [2021-06-04 21:49:43,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:43,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:43,003 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:43,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-04 21:49:43,204 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:43,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:43,204 INFO L82 PathProgramCache]: Analyzing trace with hash 401944239, now seen corresponding path program 380 times [2021-06-04 21:49:43,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:43,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443382979] [2021-06-04 21:49:43,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:43,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:43,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443382979] [2021-06-04 21:49:43,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443382979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:43,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181637059] [2021-06-04 21:49:43,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:43,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:49:43,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:43,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:43,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:43,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181637059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:43,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:43,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-04 21:49:43,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783911237] [2021-06-04 21:49:43,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:43,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:43,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:43,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:43,865 INFO L87 Difference]: Start difference. First operand 4038 states and 11128 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:44,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:44,665 INFO L93 Difference]: Finished difference Result 6206 states and 15667 transitions. [2021-06-04 21:49:44,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:49:44,666 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:49:44,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:44,671 INFO L225 Difference]: With dead ends: 6206 [2021-06-04 21:49:44,671 INFO L226 Difference]: Without dead ends: 5936 [2021-06-04 21:49:44,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 894.7ms TimeCoverageRelationStatistics Valid=1171, Invalid=3659, Unknown=0, NotChecked=0, Total=4830 [2021-06-04 21:49:44,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5936 states. [2021-06-04 21:49:44,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5936 to 4113. [2021-06-04 21:49:44,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4113 states, 4112 states have (on average 2.760943579766537) internal successors, (11353), 4112 states have internal predecessors, (11353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:44,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 11353 transitions. [2021-06-04 21:49:44,722 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 11353 transitions. Word has length 170 [2021-06-04 21:49:44,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:44,722 INFO L482 AbstractCegarLoop]: Abstraction has 4113 states and 11353 transitions. [2021-06-04 21:49:44,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:44,722 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 11353 transitions. [2021-06-04 21:49:44,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:44,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:44,725 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:44,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-04 21:49:44,926 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:44,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:44,926 INFO L82 PathProgramCache]: Analyzing trace with hash -474790529, now seen corresponding path program 381 times [2021-06-04 21:49:44,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:44,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73393854] [2021-06-04 21:49:44,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:44,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:45,284 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:45,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:45,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73393854] [2021-06-04 21:49:45,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73393854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:45,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675531345] [2021-06-04 21:49:45,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:45,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-04 21:49:45,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:45,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:45,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:45,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675531345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:45,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:45,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-04 21:49:45,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142469172] [2021-06-04 21:49:45,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:49:45,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:45,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:49:45,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:49:45,595 INFO L87 Difference]: Start difference. First operand 4113 states and 11353 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:46,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:46,539 INFO L93 Difference]: Finished difference Result 6231 states and 15792 transitions. [2021-06-04 21:49:46,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:49:46,539 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:49:46,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:46,544 INFO L225 Difference]: With dead ends: 6231 [2021-06-04 21:49:46,544 INFO L226 Difference]: Without dead ends: 5961 [2021-06-04 21:49:46,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1051.2ms TimeCoverageRelationStatistics Valid=1278, Invalid=4124, Unknown=0, NotChecked=0, Total=5402 [2021-06-04 21:49:46,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5961 states. [2021-06-04 21:49:46,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5961 to 4188. [2021-06-04 21:49:46,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4188 states, 4187 states have (on average 2.7652256985908763) internal successors, (11578), 4187 states have internal predecessors, (11578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:46,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 11578 transitions. [2021-06-04 21:49:46,591 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 11578 transitions. Word has length 170 [2021-06-04 21:49:46,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:46,592 INFO L482 AbstractCegarLoop]: Abstraction has 4188 states and 11578 transitions. [2021-06-04 21:49:46,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:46,592 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 11578 transitions. [2021-06-04 21:49:46,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:46,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:46,595 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:46,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 385 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-04 21:49:46,796 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:46,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:46,796 INFO L82 PathProgramCache]: Analyzing trace with hash 2082850413, now seen corresponding path program 382 times [2021-06-04 21:49:46,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:46,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716298255] [2021-06-04 21:49:46,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:47,134 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:47,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:47,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716298255] [2021-06-04 21:49:47,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716298255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:47,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759832459] [2021-06-04 21:49:47,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:47,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:49:47,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:47,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:47,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:47,413 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:47,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759832459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:47,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:47,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-04 21:49:47,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182260318] [2021-06-04 21:49:47,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:47,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:47,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:47,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:47,414 INFO L87 Difference]: Start difference. First operand 4188 states and 11578 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:48,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:48,263 INFO L93 Difference]: Finished difference Result 6256 states and 15917 transitions. [2021-06-04 21:49:48,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:49:48,263 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:49:48,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:48,269 INFO L225 Difference]: With dead ends: 6256 [2021-06-04 21:49:48,269 INFO L226 Difference]: Without dead ends: 5986 [2021-06-04 21:49:48,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 922.9ms TimeCoverageRelationStatistics Valid=1216, Invalid=3896, Unknown=0, NotChecked=0, Total=5112 [2021-06-04 21:49:48,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5986 states. [2021-06-04 21:49:48,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5986 to 4263. [2021-06-04 21:49:48,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4263 states, 4262 states have (on average 2.7693571093383387) internal successors, (11803), 4262 states have internal predecessors, (11803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:48,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4263 states to 4263 states and 11803 transitions. [2021-06-04 21:49:48,323 INFO L78 Accepts]: Start accepts. Automaton has 4263 states and 11803 transitions. Word has length 170 [2021-06-04 21:49:48,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:48,323 INFO L482 AbstractCegarLoop]: Abstraction has 4263 states and 11803 transitions. [2021-06-04 21:49:48,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:48,323 INFO L276 IsEmpty]: Start isEmpty. Operand 4263 states and 11803 transitions. [2021-06-04 21:49:48,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:48,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:48,327 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:48,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:48,527 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:48,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:48,527 INFO L82 PathProgramCache]: Analyzing trace with hash -847568579, now seen corresponding path program 383 times [2021-06-04 21:49:48,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:48,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87925139] [2021-06-04 21:49:48,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:48,878 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:48,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:48,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87925139] [2021-06-04 21:49:48,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87925139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:48,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70364106] [2021-06-04 21:49:48,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:48,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-04 21:49:48,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:48,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:48,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:49,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70364106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:49,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:49,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-04 21:49:49,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358997864] [2021-06-04 21:49:49,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:49:49,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:49,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:49:49,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:49:49,200 INFO L87 Difference]: Start difference. First operand 4263 states and 11803 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:50,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:50,180 INFO L93 Difference]: Finished difference Result 6281 states and 16042 transitions. [2021-06-04 21:49:50,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-04 21:49:50,181 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:49:50,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:50,186 INFO L225 Difference]: With dead ends: 6281 [2021-06-04 21:49:50,186 INFO L226 Difference]: Without dead ends: 6011 [2021-06-04 21:49:50,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1079.4ms TimeCoverageRelationStatistics Valid=1331, Invalid=4369, Unknown=0, NotChecked=0, Total=5700 [2021-06-04 21:49:50,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2021-06-04 21:49:50,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 4338. [2021-06-04 21:49:50,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4338 states, 4337 states have (on average 2.7733456306202444) internal successors, (12028), 4337 states have internal predecessors, (12028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:50,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4338 states to 4338 states and 12028 transitions. [2021-06-04 21:49:50,240 INFO L78 Accepts]: Start accepts. Automaton has 4338 states and 12028 transitions. Word has length 170 [2021-06-04 21:49:50,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:50,240 INFO L482 AbstractCegarLoop]: Abstraction has 4338 states and 12028 transitions. [2021-06-04 21:49:50,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:50,240 INFO L276 IsEmpty]: Start isEmpty. Operand 4338 states and 12028 transitions. [2021-06-04 21:49:50,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:50,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:50,244 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:50,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:50,444 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:50,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:50,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1170166699, now seen corresponding path program 384 times [2021-06-04 21:49:50,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:50,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703627403] [2021-06-04 21:49:50,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:50,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:50,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703627403] [2021-06-04 21:49:50,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703627403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:50,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656840261] [2021-06-04 21:49:50,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:50,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-04 21:49:50,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:50,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:50,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:51,064 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:51,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656840261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:51,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:51,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-04 21:49:51,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162045017] [2021-06-04 21:49:51,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:51,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:51,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:51,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:51,065 INFO L87 Difference]: Start difference. First operand 4338 states and 12028 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:51,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:51,954 INFO L93 Difference]: Finished difference Result 6306 states and 16167 transitions. [2021-06-04 21:49:51,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:49:51,954 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:49:51,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:51,958 INFO L225 Difference]: With dead ends: 6306 [2021-06-04 21:49:51,958 INFO L226 Difference]: Without dead ends: 6036 [2021-06-04 21:49:51,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 973.0ms TimeCoverageRelationStatistics Valid=1277, Invalid=4125, Unknown=0, NotChecked=0, Total=5402 [2021-06-04 21:49:51,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6036 states. [2021-06-04 21:49:52,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6036 to 4413. [2021-06-04 21:49:52,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4413 states, 4412 states have (on average 2.777198549410698) internal successors, (12253), 4412 states have internal predecessors, (12253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:52,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4413 states to 4413 states and 12253 transitions. [2021-06-04 21:49:52,014 INFO L78 Accepts]: Start accepts. Automaton has 4413 states and 12253 transitions. Word has length 170 [2021-06-04 21:49:52,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:52,014 INFO L482 AbstractCegarLoop]: Abstraction has 4413 states and 12253 transitions. [2021-06-04 21:49:52,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:52,014 INFO L276 IsEmpty]: Start isEmpty. Operand 4413 states and 12253 transitions. [2021-06-04 21:49:52,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:52,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:52,019 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:52,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-06-04 21:49:52,225 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:52,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:52,225 INFO L82 PathProgramCache]: Analyzing trace with hash 271643259, now seen corresponding path program 385 times [2021-06-04 21:49:52,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:52,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407745692] [2021-06-04 21:49:52,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:52,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:52,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:52,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407745692] [2021-06-04 21:49:52,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407745692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:52,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242376505] [2021-06-04 21:49:52,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:52,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:52,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:52,883 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:52,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242376505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:52,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:52,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-04 21:49:52,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711437296] [2021-06-04 21:49:52,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:49:52,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:52,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:49:52,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:49:52,884 INFO L87 Difference]: Start difference. First operand 4413 states and 12253 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:53,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:53,975 INFO L93 Difference]: Finished difference Result 6331 states and 16292 transitions. [2021-06-04 21:49:53,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:49:53,975 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:49:53,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:53,981 INFO L225 Difference]: With dead ends: 6331 [2021-06-04 21:49:53,981 INFO L226 Difference]: Without dead ends: 6061 [2021-06-04 21:49:53,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 1138.0ms TimeCoverageRelationStatistics Valid=1400, Invalid=4606, Unknown=0, NotChecked=0, Total=6006 [2021-06-04 21:49:53,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-06-04 21:49:54,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 4488. [2021-06-04 21:49:54,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4488 states, 4487 states have (on average 2.7809226654780477) internal successors, (12478), 4487 states have internal predecessors, (12478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:54,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 12478 transitions. [2021-06-04 21:49:54,040 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 12478 transitions. Word has length 170 [2021-06-04 21:49:54,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:54,040 INFO L482 AbstractCegarLoop]: Abstraction has 4488 states and 12478 transitions. [2021-06-04 21:49:54,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:54,040 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 12478 transitions. [2021-06-04 21:49:54,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:54,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:54,044 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:54,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:54,245 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:54,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:54,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1343310231, now seen corresponding path program 386 times [2021-06-04 21:49:54,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:54,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134115804] [2021-06-04 21:49:54,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:54,567 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:54,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:54,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134115804] [2021-06-04 21:49:54,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134115804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:54,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105330047] [2021-06-04 21:49:54,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:54,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:49:54,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:54,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:54,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:54,875 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:54,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105330047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:54,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:54,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-04 21:49:54,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330949355] [2021-06-04 21:49:54,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:54,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:54,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:54,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:54,876 INFO L87 Difference]: Start difference. First operand 4488 states and 12478 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:55,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:55,812 INFO L93 Difference]: Finished difference Result 6356 states and 16417 transitions. [2021-06-04 21:49:55,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-04 21:49:55,812 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:49:55,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:55,819 INFO L225 Difference]: With dead ends: 6356 [2021-06-04 21:49:55,819 INFO L226 Difference]: Without dead ends: 6086 [2021-06-04 21:49:55,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 977.3ms TimeCoverageRelationStatistics Valid=1354, Invalid=4346, Unknown=0, NotChecked=0, Total=5700 [2021-06-04 21:49:55,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2021-06-04 21:49:55,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 4563. [2021-06-04 21:49:55,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4562 states have (on average 2.7845243314335817) internal successors, (12703), 4562 states have internal predecessors, (12703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:55,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 12703 transitions. [2021-06-04 21:49:55,877 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 12703 transitions. Word has length 170 [2021-06-04 21:49:55,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:55,877 INFO L482 AbstractCegarLoop]: Abstraction has 4563 states and 12703 transitions. [2021-06-04 21:49:55,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:55,878 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 12703 transitions. [2021-06-04 21:49:55,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:55,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:55,881 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:56,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable394 [2021-06-04 21:49:56,082 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:56,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:56,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1723754183, now seen corresponding path program 387 times [2021-06-04 21:49:56,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:56,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117134815] [2021-06-04 21:49:56,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:56,428 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:56,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:56,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117134815] [2021-06-04 21:49:56,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117134815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:56,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99109077] [2021-06-04 21:49:56,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:56,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-04 21:49:56,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:56,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:56,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:56,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99109077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:56,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:56,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-04 21:49:56,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005186844] [2021-06-04 21:49:56,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:49:56,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:56,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:49:56,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:49:56,729 INFO L87 Difference]: Start difference. First operand 4563 states and 12703 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:57,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:57,892 INFO L93 Difference]: Finished difference Result 6381 states and 16542 transitions. [2021-06-04 21:49:57,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-04 21:49:57,892 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:49:57,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:57,898 INFO L225 Difference]: With dead ends: 6381 [2021-06-04 21:49:57,898 INFO L226 Difference]: Without dead ends: 6111 [2021-06-04 21:49:57,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1446 ImplicationChecksByTransitivity, 1209.6ms TimeCoverageRelationStatistics Valid=1485, Invalid=4835, Unknown=0, NotChecked=0, Total=6320 [2021-06-04 21:49:57,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6111 states. [2021-06-04 21:49:57,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6111 to 4638. [2021-06-04 21:49:57,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4638 states, 4637 states have (on average 2.7880094888936813) internal successors, (12928), 4637 states have internal predecessors, (12928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:57,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4638 states to 4638 states and 12928 transitions. [2021-06-04 21:49:57,952 INFO L78 Accepts]: Start accepts. Automaton has 4638 states and 12928 transitions. Word has length 170 [2021-06-04 21:49:57,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:57,953 INFO L482 AbstractCegarLoop]: Abstraction has 4638 states and 12928 transitions. [2021-06-04 21:49:57,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:57,953 INFO L276 IsEmpty]: Start isEmpty. Operand 4638 states and 12928 transitions. [2021-06-04 21:49:57,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:57,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:57,957 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:49:58,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:58,157 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:58,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:58,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1099379033, now seen corresponding path program 388 times [2021-06-04 21:49:58,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:58,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015799948] [2021-06-04 21:49:58,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:58,499 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:58,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:58,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015799948] [2021-06-04 21:49:58,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015799948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:58,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607504434] [2021-06-04 21:49:58,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:58,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:49:58,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:58,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:58,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:58,778 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:58,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607504434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:58,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:58,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-04 21:49:58,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748739043] [2021-06-04 21:49:58,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:58,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:58,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:58,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:58,779 INFO L87 Difference]: Start difference. First operand 4638 states and 12928 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:59,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:59,761 INFO L93 Difference]: Finished difference Result 6406 states and 16667 transitions. [2021-06-04 21:49:59,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-04 21:49:59,761 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:49:59,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:59,767 INFO L225 Difference]: With dead ends: 6406 [2021-06-04 21:49:59,767 INFO L226 Difference]: Without dead ends: 6136 [2021-06-04 21:49:59,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 1036.3ms TimeCoverageRelationStatistics Valid=1447, Invalid=4559, Unknown=0, NotChecked=0, Total=6006 [2021-06-04 21:49:59,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6136 states. [2021-06-04 21:49:59,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6136 to 4713. [2021-06-04 21:49:59,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4713 states, 4712 states have (on average 2.791383701188455) internal successors, (13153), 4712 states have internal predecessors, (13153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:59,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4713 states to 4713 states and 13153 transitions. [2021-06-04 21:49:59,827 INFO L78 Accepts]: Start accepts. Automaton has 4713 states and 13153 transitions. Word has length 170 [2021-06-04 21:49:59,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:59,827 INFO L482 AbstractCegarLoop]: Abstraction has 4713 states and 13153 transitions. [2021-06-04 21:49:59,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:49:59,827 INFO L276 IsEmpty]: Start isEmpty. Operand 4713 states and 13153 transitions. [2021-06-04 21:49:59,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:59,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:59,831 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:00,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:00,031 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:00,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:00,031 INFO L82 PathProgramCache]: Analyzing trace with hash -290327177, now seen corresponding path program 389 times [2021-06-04 21:50:00,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:00,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080064468] [2021-06-04 21:50:00,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:00,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:00,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080064468] [2021-06-04 21:50:00,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080064468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:00,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959524312] [2021-06-04 21:50:00,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:00,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-04 21:50:00,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:00,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:50:00,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:00,682 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:00,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959524312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:00,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:00,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-04 21:50:00,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986199097] [2021-06-04 21:50:00,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:50:00,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:00,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:50:00,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:50:00,683 INFO L87 Difference]: Start difference. First operand 4713 states and 13153 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:01,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:01,913 INFO L93 Difference]: Finished difference Result 6431 states and 16792 transitions. [2021-06-04 21:50:01,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-04 21:50:01,913 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:50:01,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:01,921 INFO L225 Difference]: With dead ends: 6431 [2021-06-04 21:50:01,921 INFO L226 Difference]: Without dead ends: 6161 [2021-06-04 21:50:01,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1565 ImplicationChecksByTransitivity, 1247.6ms TimeCoverageRelationStatistics Valid=1586, Invalid=5056, Unknown=0, NotChecked=0, Total=6642 [2021-06-04 21:50:01,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6161 states. [2021-06-04 21:50:01,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6161 to 4788. [2021-06-04 21:50:01,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4788 states, 4787 states have (on average 2.794652182995613) internal successors, (13378), 4787 states have internal predecessors, (13378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:01,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4788 states to 4788 states and 13378 transitions. [2021-06-04 21:50:01,992 INFO L78 Accepts]: Start accepts. Automaton has 4788 states and 13378 transitions. Word has length 170 [2021-06-04 21:50:01,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:01,992 INFO L482 AbstractCegarLoop]: Abstraction has 4788 states and 13378 transitions. [2021-06-04 21:50:01,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:01,992 INFO L276 IsEmpty]: Start isEmpty. Operand 4788 states and 13378 transitions. [2021-06-04 21:50:01,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:50:01,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:01,997 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:02,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:02,198 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:02,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:02,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1682277275, now seen corresponding path program 390 times [2021-06-04 21:50:02,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:02,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103124189] [2021-06-04 21:50:02,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:02,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:02,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103124189] [2021-06-04 21:50:02,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103124189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:02,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295766050] [2021-06-04 21:50:02,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:02,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-04 21:50:02,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:02,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:50:02,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:02,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295766050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:02,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:02,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-04 21:50:02,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794771918] [2021-06-04 21:50:02,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:50:02,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:02,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:50:02,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:50:02,855 INFO L87 Difference]: Start difference. First operand 4788 states and 13378 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:04,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:04,062 INFO L93 Difference]: Finished difference Result 6456 states and 16917 transitions. [2021-06-04 21:50:04,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-04 21:50:04,062 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:50:04,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:04,071 INFO L225 Difference]: With dead ends: 6456 [2021-06-04 21:50:04,071 INFO L226 Difference]: Without dead ends: 6186 [2021-06-04 21:50:04,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 1165.7ms TimeCoverageRelationStatistics Valid=1556, Invalid=4764, Unknown=0, NotChecked=0, Total=6320 [2021-06-04 21:50:04,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6186 states. [2021-06-04 21:50:04,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6186 to 4863. [2021-06-04 21:50:04,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4863 states, 4862 states have (on average 2.7978198272315917) internal successors, (13603), 4862 states have internal predecessors, (13603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:04,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4863 states to 4863 states and 13603 transitions. [2021-06-04 21:50:04,156 INFO L78 Accepts]: Start accepts. Automaton has 4863 states and 13603 transitions. Word has length 170 [2021-06-04 21:50:04,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:04,157 INFO L482 AbstractCegarLoop]: Abstraction has 4863 states and 13603 transitions. [2021-06-04 21:50:04,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:04,157 INFO L276 IsEmpty]: Start isEmpty. Operand 4863 states and 13603 transitions. [2021-06-04 21:50:04,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:50:04,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:04,162 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:04,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-04 21:50:04,385 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:04,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:04,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1927354571, now seen corresponding path program 391 times [2021-06-04 21:50:04,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:04,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176992314] [2021-06-04 21:50:04,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:04,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:04,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:04,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176992314] [2021-06-04 21:50:04,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176992314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:04,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218612827] [2021-06-04 21:50:04,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:04,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:50:04,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:05,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218612827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:05,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:05,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-04 21:50:05,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108994751] [2021-06-04 21:50:05,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:50:05,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:05,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:50:05,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:50:05,003 INFO L87 Difference]: Start difference. First operand 4863 states and 13603 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:06,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:06,424 INFO L93 Difference]: Finished difference Result 6481 states and 17042 transitions. [2021-06-04 21:50:06,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-04 21:50:06,424 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:50:06,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:06,431 INFO L225 Difference]: With dead ends: 6481 [2021-06-04 21:50:06,431 INFO L226 Difference]: Without dead ends: 6211 [2021-06-04 21:50:06,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 1423.3ms TimeCoverageRelationStatistics Valid=1703, Invalid=5269, Unknown=0, NotChecked=0, Total=6972 [2021-06-04 21:50:06,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6211 states. [2021-06-04 21:50:06,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6211 to 4938. [2021-06-04 21:50:06,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4938 states, 4937 states have (on average 2.800891229491594) internal successors, (13828), 4937 states have internal predecessors, (13828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:06,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4938 states to 4938 states and 13828 transitions. [2021-06-04 21:50:06,511 INFO L78 Accepts]: Start accepts. Automaton has 4938 states and 13828 transitions. Word has length 170 [2021-06-04 21:50:06,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:06,511 INFO L482 AbstractCegarLoop]: Abstraction has 4938 states and 13828 transitions. [2021-06-04 21:50:06,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:06,511 INFO L276 IsEmpty]: Start isEmpty. Operand 4938 states and 13828 transitions. [2021-06-04 21:50:06,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:50:06,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:06,515 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:06,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable399,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:06,716 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:06,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:06,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1990762403, now seen corresponding path program 392 times [2021-06-04 21:50:06,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:06,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015113665] [2021-06-04 21:50:06,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:07,106 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:07,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:07,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015113665] [2021-06-04 21:50:07,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015113665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:07,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375070059] [2021-06-04 21:50:07,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:07,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:50:07,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:07,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:50:07,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:07,404 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:07,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375070059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:07,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:07,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-04 21:50:07,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110879607] [2021-06-04 21:50:07,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:50:07,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:07,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:50:07,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:50:07,405 INFO L87 Difference]: Start difference. First operand 4938 states and 13828 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:08,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:08,687 INFO L93 Difference]: Finished difference Result 6506 states and 17167 transitions. [2021-06-04 21:50:08,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-04 21:50:08,687 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:50:08,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:08,694 INFO L225 Difference]: With dead ends: 6506 [2021-06-04 21:50:08,694 INFO L226 Difference]: Without dead ends: 6236 [2021-06-04 21:50:08,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 1276.1ms TimeCoverageRelationStatistics Valid=1681, Invalid=4961, Unknown=0, NotChecked=0, Total=6642 [2021-06-04 21:50:08,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6236 states. [2021-06-04 21:50:08,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6236 to 5013. [2021-06-04 21:50:08,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5013 states, 5012 states have (on average 2.8038707102952913) internal successors, (14053), 5012 states have internal predecessors, (14053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:08,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5013 states to 5013 states and 14053 transitions. [2021-06-04 21:50:08,762 INFO L78 Accepts]: Start accepts. Automaton has 5013 states and 14053 transitions. Word has length 170 [2021-06-04 21:50:08,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:08,762 INFO L482 AbstractCegarLoop]: Abstraction has 5013 states and 14053 transitions. [2021-06-04 21:50:08,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:08,763 INFO L276 IsEmpty]: Start isEmpty. Operand 5013 states and 14053 transitions. [2021-06-04 21:50:08,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:50:08,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:08,767 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:08,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-04 21:50:08,967 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:08,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:08,967 INFO L82 PathProgramCache]: Analyzing trace with hash -977449357, now seen corresponding path program 393 times [2021-06-04 21:50:08,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:08,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912812015] [2021-06-04 21:50:08,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:08,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:09,290 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:09,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:09,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912812015] [2021-06-04 21:50:09,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912812015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:09,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289262946] [2021-06-04 21:50:09,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:09,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-04 21:50:09,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:09,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:50:09,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:09,639 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:09,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289262946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:09,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:09,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-04 21:50:09,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447013532] [2021-06-04 21:50:09,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:50:09,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:09,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:50:09,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:50:09,640 INFO L87 Difference]: Start difference. First operand 5013 states and 14053 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:11,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:11,074 INFO L93 Difference]: Finished difference Result 6531 states and 17292 transitions. [2021-06-04 21:50:11,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-04 21:50:11,074 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:50:11,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:11,081 INFO L225 Difference]: With dead ends: 6531 [2021-06-04 21:50:11,082 INFO L226 Difference]: Without dead ends: 6261 [2021-06-04 21:50:11,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 1364.7ms TimeCoverageRelationStatistics Valid=1836, Invalid=5474, Unknown=0, NotChecked=0, Total=7310 [2021-06-04 21:50:11,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6261 states. [2021-06-04 21:50:11,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6261 to 5088. [2021-06-04 21:50:11,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5088 states, 5087 states have (on average 2.806762335364655) internal successors, (14278), 5087 states have internal predecessors, (14278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:11,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 14278 transitions. [2021-06-04 21:50:11,150 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 14278 transitions. Word has length 170 [2021-06-04 21:50:11,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:11,150 INFO L482 AbstractCegarLoop]: Abstraction has 5088 states and 14278 transitions. [2021-06-04 21:50:11,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:11,150 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 14278 transitions. [2021-06-04 21:50:11,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:50:11,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:11,154 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:11,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-04 21:50:11,355 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:11,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:11,355 INFO L82 PathProgramCache]: Analyzing trace with hash -523233183, now seen corresponding path program 394 times [2021-06-04 21:50:11,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:11,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033501407] [2021-06-04 21:50:11,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:11,705 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:11,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:11,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033501407] [2021-06-04 21:50:11,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033501407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:11,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083006990] [2021-06-04 21:50:11,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:11,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:50:11,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:11,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:50:11,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:11,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083006990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:11,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:11,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-04 21:50:11,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736622256] [2021-06-04 21:50:11,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:50:11,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:11,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:50:11,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:50:11,979 INFO L87 Difference]: Start difference. First operand 5088 states and 14278 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:13,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:13,218 INFO L93 Difference]: Finished difference Result 6556 states and 17417 transitions. [2021-06-04 21:50:13,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-04 21:50:13,218 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:50:13,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:13,226 INFO L225 Difference]: With dead ends: 6556 [2021-06-04 21:50:13,226 INFO L226 Difference]: Without dead ends: 6286 [2021-06-04 21:50:13,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 1245.0ms TimeCoverageRelationStatistics Valid=1822, Invalid=5150, Unknown=0, NotChecked=0, Total=6972 [2021-06-04 21:50:13,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6286 states. [2021-06-04 21:50:13,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6286 to 5163. [2021-06-04 21:50:13,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5163 states, 5162 states have (on average 2.8095699341340565) internal successors, (14503), 5162 states have internal predecessors, (14503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:13,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5163 states to 5163 states and 14503 transitions. [2021-06-04 21:50:13,311 INFO L78 Accepts]: Start accepts. Automaton has 5163 states and 14503 transitions. Word has length 170 [2021-06-04 21:50:13,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:13,311 INFO L482 AbstractCegarLoop]: Abstraction has 5163 states and 14503 transitions. [2021-06-04 21:50:13,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:13,312 INFO L276 IsEmpty]: Start isEmpty. Operand 5163 states and 14503 transitions. [2021-06-04 21:50:13,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:50:13,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:13,316 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:13,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:13,517 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:13,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:13,517 INFO L82 PathProgramCache]: Analyzing trace with hash 475663153, now seen corresponding path program 395 times [2021-06-04 21:50:13,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:13,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834800306] [2021-06-04 21:50:13,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:13,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:13,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834800306] [2021-06-04 21:50:13,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834800306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:13,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574512276] [2021-06-04 21:50:13,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:13,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-04 21:50:13,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:13,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:50:13,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:14,146 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:14,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574512276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:14,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:14,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-04 21:50:14,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799225734] [2021-06-04 21:50:14,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:50:14,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:14,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:50:14,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:50:14,147 INFO L87 Difference]: Start difference. First operand 5163 states and 14503 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:15,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:15,664 INFO L93 Difference]: Finished difference Result 6581 states and 17542 transitions. [2021-06-04 21:50:15,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-04 21:50:15,665 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:50:15,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:15,671 INFO L225 Difference]: With dead ends: 6581 [2021-06-04 21:50:15,671 INFO L226 Difference]: Without dead ends: 6311 [2021-06-04 21:50:15,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1946 ImplicationChecksByTransitivity, 1448.1ms TimeCoverageRelationStatistics Valid=1985, Invalid=5671, Unknown=0, NotChecked=0, Total=7656 [2021-06-04 21:50:15,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6311 states. [2021-06-04 21:50:15,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6311 to 5238. [2021-06-04 21:50:15,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5238 states, 5237 states have (on average 2.812297116669849) internal successors, (14728), 5237 states have internal predecessors, (14728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:15,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5238 states to 5238 states and 14728 transitions. [2021-06-04 21:50:15,736 INFO L78 Accepts]: Start accepts. Automaton has 5238 states and 14728 transitions. Word has length 170 [2021-06-04 21:50:15,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:15,736 INFO L482 AbstractCegarLoop]: Abstraction has 5238 states and 14728 transitions. [2021-06-04 21:50:15,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:15,736 INFO L276 IsEmpty]: Start isEmpty. Operand 5238 states and 14728 transitions. [2021-06-04 21:50:15,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:50:15,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:15,741 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:15,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-06-04 21:50:15,941 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:15,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:15,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1403664737, now seen corresponding path program 396 times [2021-06-04 21:50:15,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:15,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386934577] [2021-06-04 21:50:15,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:16,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:16,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386934577] [2021-06-04 21:50:16,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386934577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:16,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018192898] [2021-06-04 21:50:16,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:16,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-04 21:50:16,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:16,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:50:16,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:16,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018192898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:16,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:16,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-04 21:50:16,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402418333] [2021-06-04 21:50:16,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:50:16,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:16,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:50:16,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:50:16,540 INFO L87 Difference]: Start difference. First operand 5238 states and 14728 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:17,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:17,764 INFO L93 Difference]: Finished difference Result 6606 states and 17667 transitions. [2021-06-04 21:50:17,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-04 21:50:17,764 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:50:17,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:17,772 INFO L225 Difference]: With dead ends: 6606 [2021-06-04 21:50:17,772 INFO L226 Difference]: Without dead ends: 6336 [2021-06-04 21:50:17,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 1180.6ms TimeCoverageRelationStatistics Valid=1979, Invalid=5331, Unknown=0, NotChecked=0, Total=7310 [2021-06-04 21:50:17,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6336 states. [2021-06-04 21:50:17,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6336 to 5313. [2021-06-04 21:50:17,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5313 states, 5312 states have (on average 2.8149472891566263) internal successors, (14953), 5312 states have internal predecessors, (14953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:17,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5313 states to 5313 states and 14953 transitions. [2021-06-04 21:50:17,852 INFO L78 Accepts]: Start accepts. Automaton has 5313 states and 14953 transitions. Word has length 170 [2021-06-04 21:50:17,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:17,853 INFO L482 AbstractCegarLoop]: Abstraction has 5313 states and 14953 transitions. [2021-06-04 21:50:17,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:17,853 INFO L276 IsEmpty]: Start isEmpty. Operand 5313 states and 14953 transitions. [2021-06-04 21:50:17,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:50:17,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:17,857 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:18,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-04 21:50:18,058 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:18,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:18,058 INFO L82 PathProgramCache]: Analyzing trace with hash 626654575, now seen corresponding path program 397 times [2021-06-04 21:50:18,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:18,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546761596] [2021-06-04 21:50:18,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:18,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:18,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546761596] [2021-06-04 21:50:18,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546761596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:18,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980783635] [2021-06-04 21:50:18,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:18,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:50:18,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:18,697 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:18,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980783635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:18,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:18,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-04 21:50:18,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445246952] [2021-06-04 21:50:18,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:50:18,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:18,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:50:18,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=919, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:50:18,698 INFO L87 Difference]: Start difference. First operand 5313 states and 14953 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:20,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:20,195 INFO L93 Difference]: Finished difference Result 6631 states and 17792 transitions. [2021-06-04 21:50:20,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-04 21:50:20,196 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:50:20,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:20,203 INFO L225 Difference]: With dead ends: 6631 [2021-06-04 21:50:20,203 INFO L226 Difference]: Without dead ends: 6361 [2021-06-04 21:50:20,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 1481.9ms TimeCoverageRelationStatistics Valid=2150, Invalid=5860, Unknown=0, NotChecked=0, Total=8010 [2021-06-04 21:50:20,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2021-06-04 21:50:20,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 5388. [2021-06-04 21:50:20,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5388 states, 5387 states have (on average 2.817523668089846) internal successors, (15178), 5387 states have internal predecessors, (15178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:20,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5388 states to 5388 states and 15178 transitions. [2021-06-04 21:50:20,276 INFO L78 Accepts]: Start accepts. Automaton has 5388 states and 15178 transitions. Word has length 170 [2021-06-04 21:50:20,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:20,276 INFO L482 AbstractCegarLoop]: Abstraction has 5388 states and 15178 transitions. [2021-06-04 21:50:20,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:20,276 INFO L276 IsEmpty]: Start isEmpty. Operand 5388 states and 15178 transitions. [2021-06-04 21:50:20,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:50:20,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:20,281 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:20,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:20,481 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:20,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:20,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1240894045, now seen corresponding path program 398 times [2021-06-04 21:50:20,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:20,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805881603] [2021-06-04 21:50:20,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:20,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:20,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805881603] [2021-06-04 21:50:20,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805881603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:20,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301151309] [2021-06-04 21:50:20,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:20,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:50:20,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:20,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:50:20,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:21,117 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:21,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301151309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:21,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:21,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-04 21:50:21,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138712802] [2021-06-04 21:50:21,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:50:21,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:21,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:50:21,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:50:21,119 INFO L87 Difference]: Start difference. First operand 5388 states and 15178 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:22,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:22,404 INFO L93 Difference]: Finished difference Result 6656 states and 17917 transitions. [2021-06-04 21:50:22,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-04 21:50:22,404 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:50:22,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:22,412 INFO L225 Difference]: With dead ends: 6656 [2021-06-04 21:50:22,412 INFO L226 Difference]: Without dead ends: 6386 [2021-06-04 21:50:22,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 1263.2ms TimeCoverageRelationStatistics Valid=2152, Invalid=5504, Unknown=0, NotChecked=0, Total=7656 [2021-06-04 21:50:22,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6386 states. [2021-06-04 21:50:22,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6386 to 5463. [2021-06-04 21:50:22,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5463 states, 5462 states have (on average 2.8200292932991577) internal successors, (15403), 5462 states have internal predecessors, (15403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:22,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5463 states to 5463 states and 15403 transitions. [2021-06-04 21:50:22,488 INFO L78 Accepts]: Start accepts. Automaton has 5463 states and 15403 transitions. Word has length 170 [2021-06-04 21:50:22,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:22,488 INFO L482 AbstractCegarLoop]: Abstraction has 5463 states and 15403 transitions. [2021-06-04 21:50:22,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:22,488 INFO L276 IsEmpty]: Start isEmpty. Operand 5463 states and 15403 transitions. [2021-06-04 21:50:22,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:50:22,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:22,493 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:22,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:22,693 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:22,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:22,694 INFO L82 PathProgramCache]: Analyzing trace with hash -474348243, now seen corresponding path program 399 times [2021-06-04 21:50:22,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:22,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584544454] [2021-06-04 21:50:22,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:22,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:23,013 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:23,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:23,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584544454] [2021-06-04 21:50:23,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584544454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:23,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189289505] [2021-06-04 21:50:23,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:23,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-04 21:50:23,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:23,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:50:23,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:23,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189289505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:23,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:23,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-04 21:50:23,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628294283] [2021-06-04 21:50:23,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:50:23,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:23,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:50:23,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:50:23,311 INFO L87 Difference]: Start difference. First operand 5463 states and 15403 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:24,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:24,877 INFO L93 Difference]: Finished difference Result 6741 states and 18207 transitions. [2021-06-04 21:50:24,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-04 21:50:24,878 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:50:24,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:24,884 INFO L225 Difference]: With dead ends: 6741 [2021-06-04 21:50:24,884 INFO L226 Difference]: Without dead ends: 6471 [2021-06-04 21:50:24,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2220 ImplicationChecksByTransitivity, 1544.0ms TimeCoverageRelationStatistics Valid=2331, Invalid=6041, Unknown=0, NotChecked=0, Total=8372 [2021-06-04 21:50:24,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6471 states. [2021-06-04 21:50:24,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6471 to 5538. [2021-06-04 21:50:24,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5538 states, 5537 states have (on average 2.826079104208055) internal successors, (15648), 5537 states have internal predecessors, (15648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:24,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5538 states to 5538 states and 15648 transitions. [2021-06-04 21:50:24,948 INFO L78 Accepts]: Start accepts. Automaton has 5538 states and 15648 transitions. Word has length 170 [2021-06-04 21:50:24,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:24,948 INFO L482 AbstractCegarLoop]: Abstraction has 5538 states and 15648 transitions. [2021-06-04 21:50:24,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:24,948 INFO L276 IsEmpty]: Start isEmpty. Operand 5538 states and 15648 transitions. [2021-06-04 21:50:24,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:50:24,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:24,953 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:25,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:25,153 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:25,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:25,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1506995845, now seen corresponding path program 400 times [2021-06-04 21:50:25,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:25,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619939356] [2021-06-04 21:50:25,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:25,478 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:25,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:25,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619939356] [2021-06-04 21:50:25,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619939356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:25,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537226724] [2021-06-04 21:50:25,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:25,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:50:25,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:25,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:50:25,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:25,747 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:25,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537226724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:25,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:25,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-04 21:50:25,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517638751] [2021-06-04 21:50:25,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:50:25,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:25,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:50:25,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:50:25,748 INFO L87 Difference]: Start difference. First operand 5538 states and 15648 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:27,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:27,142 INFO L93 Difference]: Finished difference Result 7508 states and 20381 transitions. [2021-06-04 21:50:27,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-04 21:50:27,142 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:50:27,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:27,149 INFO L225 Difference]: With dead ends: 7508 [2021-06-04 21:50:27,149 INFO L226 Difference]: Without dead ends: 7238 [2021-06-04 21:50:27,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2169 ImplicationChecksByTransitivity, 1352.7ms TimeCoverageRelationStatistics Valid=2342, Invalid=5668, Unknown=0, NotChecked=0, Total=8010 [2021-06-04 21:50:27,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7238 states. [2021-06-04 21:50:27,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7238 to 5718. [2021-06-04 21:50:27,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5718 states, 5717 states have (on average 2.8348784327444463) internal successors, (16207), 5717 states have internal predecessors, (16207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:27,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5718 states to 5718 states and 16207 transitions. [2021-06-04 21:50:27,218 INFO L78 Accepts]: Start accepts. Automaton has 5718 states and 16207 transitions. Word has length 170 [2021-06-04 21:50:27,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:27,219 INFO L482 AbstractCegarLoop]: Abstraction has 5718 states and 16207 transitions. [2021-06-04 21:50:27,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:27,219 INFO L276 IsEmpty]: Start isEmpty. Operand 5718 states and 16207 transitions. [2021-06-04 21:50:27,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:50:27,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:27,224 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:27,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:27,424 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:27,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:27,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1484652595, now seen corresponding path program 401 times [2021-06-04 21:50:27,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:27,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130164969] [2021-06-04 21:50:27,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:27,753 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:27,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:27,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130164969] [2021-06-04 21:50:27,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130164969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:27,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136226454] [2021-06-04 21:50:27,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:27,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-04 21:50:27,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:27,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:50:27,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:28,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136226454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:28,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:28,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-04 21:50:28,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520135258] [2021-06-04 21:50:28,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:50:28,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:28,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:50:28,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:50:28,040 INFO L87 Difference]: Start difference. First operand 5718 states and 16207 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:29,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:29,720 INFO L93 Difference]: Finished difference Result 6995 states and 19081 transitions. [2021-06-04 21:50:29,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-04 21:50:29,721 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-06-04 21:50:29,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:29,728 INFO L225 Difference]: With dead ends: 6995 [2021-06-04 21:50:29,728 INFO L226 Difference]: Without dead ends: 6506 [2021-06-04 21:50:29,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2363 ImplicationChecksByTransitivity, 1647.4ms TimeCoverageRelationStatistics Valid=2531, Invalid=6211, Unknown=0, NotChecked=0, Total=8742 [2021-06-04 21:50:29,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6506 states. [2021-06-04 21:50:29,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6506 to 3713. [2021-06-04 21:50:29,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3713 states, 3712 states have (on average 2.741918103448276) internal successors, (10178), 3712 states have internal predecessors, (10178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:29,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3713 states to 3713 states and 10178 transitions. [2021-06-04 21:50:29,779 INFO L78 Accepts]: Start accepts. Automaton has 3713 states and 10178 transitions. Word has length 170 [2021-06-04 21:50:29,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:29,780 INFO L482 AbstractCegarLoop]: Abstraction has 3713 states and 10178 transitions. [2021-06-04 21:50:29,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:29,780 INFO L276 IsEmpty]: Start isEmpty. Operand 3713 states and 10178 transitions. [2021-06-04 21:50:29,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:29,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:29,783 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:29,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,405 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:29,983 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:29,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:29,983 INFO L82 PathProgramCache]: Analyzing trace with hash -435860238, now seen corresponding path program 402 times [2021-06-04 21:50:29,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:29,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864075983] [2021-06-04 21:50:29,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:29,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:30,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:30,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864075983] [2021-06-04 21:50:30,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864075983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:30,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867462888] [2021-06-04 21:50:30,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:30,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-04 21:50:30,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:30,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:30,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:30,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867462888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:30,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:30,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-04 21:50:30,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163433486] [2021-06-04 21:50:30,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:50:30,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:30,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:50:30,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:50:30,720 INFO L87 Difference]: Start difference. First operand 3713 states and 10178 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:31,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:31,462 INFO L93 Difference]: Finished difference Result 5531 states and 14017 transitions. [2021-06-04 21:50:31,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:50:31,462 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-04 21:50:31,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:31,468 INFO L225 Difference]: With dead ends: 5531 [2021-06-04 21:50:31,468 INFO L226 Difference]: Without dead ends: 5261 [2021-06-04 21:50:31,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 921.4ms TimeCoverageRelationStatistics Valid=1223, Invalid=3333, Unknown=0, NotChecked=0, Total=4556 [2021-06-04 21:50:31,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2021-06-04 21:50:31,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 3788. [2021-06-04 21:50:31,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 2.7470293108001056) internal successors, (10403), 3787 states have internal predecessors, (10403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:31,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 10403 transitions. [2021-06-04 21:50:31,515 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 10403 transitions. Word has length 175 [2021-06-04 21:50:31,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:31,515 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 10403 transitions. [2021-06-04 21:50:31,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:31,515 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 10403 transitions. [2021-06-04 21:50:31,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:31,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:31,518 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:31,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-04 21:50:31,719 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:31,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:31,719 INFO L82 PathProgramCache]: Analyzing trace with hash 261855170, now seen corresponding path program 403 times [2021-06-04 21:50:31,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:31,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407853614] [2021-06-04 21:50:31,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:32,134 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:32,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:32,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407853614] [2021-06-04 21:50:32,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407853614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:32,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414702767] [2021-06-04 21:50:32,134 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:32,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:32,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:32,443 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:32,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414702767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:32,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:32,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-04 21:50:32,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128577615] [2021-06-04 21:50:32,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:50:32,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:32,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:50:32,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:50:32,444 INFO L87 Difference]: Start difference. First operand 3788 states and 10403 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:33,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:33,256 INFO L93 Difference]: Finished difference Result 6251 states and 15532 transitions. [2021-06-04 21:50:33,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:50:33,256 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-04 21:50:33,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:33,261 INFO L225 Difference]: With dead ends: 6251 [2021-06-04 21:50:33,262 INFO L226 Difference]: Without dead ends: 5981 [2021-06-04 21:50:33,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 989.2ms TimeCoverageRelationStatistics Valid=1291, Invalid=3679, Unknown=0, NotChecked=0, Total=4970 [2021-06-04 21:50:33,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5981 states. [2021-06-04 21:50:33,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5981 to 3863. [2021-06-04 21:50:33,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3863 states, 3862 states have (on average 2.7519419989642673) internal successors, (10628), 3862 states have internal predecessors, (10628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:33,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3863 states to 3863 states and 10628 transitions. [2021-06-04 21:50:33,309 INFO L78 Accepts]: Start accepts. Automaton has 3863 states and 10628 transitions. Word has length 175 [2021-06-04 21:50:33,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:33,309 INFO L482 AbstractCegarLoop]: Abstraction has 3863 states and 10628 transitions. [2021-06-04 21:50:33,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:33,309 INFO L276 IsEmpty]: Start isEmpty. Operand 3863 states and 10628 transitions. [2021-06-04 21:50:33,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:33,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:33,312 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:33,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-04 21:50:33,513 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:33,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:33,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1458027472, now seen corresponding path program 404 times [2021-06-04 21:50:33,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:33,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544546548] [2021-06-04 21:50:33,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:33,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:33,902 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:33,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:33,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544546548] [2021-06-04 21:50:33,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544546548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:33,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599302334] [2021-06-04 21:50:33,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:33,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:50:33,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:33,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:33,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:34,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599302334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:34,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:34,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-04 21:50:34,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636918226] [2021-06-04 21:50:34,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:50:34,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:34,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:50:34,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:50:34,194 INFO L87 Difference]: Start difference. First operand 3863 states and 10628 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:34,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:34,970 INFO L93 Difference]: Finished difference Result 6281 states and 15667 transitions. [2021-06-04 21:50:34,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:50:34,970 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-04 21:50:34,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:34,976 INFO L225 Difference]: With dead ends: 6281 [2021-06-04 21:50:34,976 INFO L226 Difference]: Without dead ends: 6011 [2021-06-04 21:50:34,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 929.1ms TimeCoverageRelationStatistics Valid=1281, Invalid=3689, Unknown=0, NotChecked=0, Total=4970 [2021-06-04 21:50:34,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2021-06-04 21:50:35,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 3938. [2021-06-04 21:50:35,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3938 states, 3937 states have (on average 2.7566675133350267) internal successors, (10853), 3937 states have internal predecessors, (10853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:35,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3938 states to 3938 states and 10853 transitions. [2021-06-04 21:50:35,028 INFO L78 Accepts]: Start accepts. Automaton has 3938 states and 10853 transitions. Word has length 175 [2021-06-04 21:50:35,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:35,028 INFO L482 AbstractCegarLoop]: Abstraction has 3938 states and 10853 transitions. [2021-06-04 21:50:35,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:35,029 INFO L276 IsEmpty]: Start isEmpty. Operand 3938 states and 10853 transitions. [2021-06-04 21:50:35,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:35,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:35,032 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:35,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:35,232 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:35,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:35,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1959341312, now seen corresponding path program 405 times [2021-06-04 21:50:35,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:35,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600772070] [2021-06-04 21:50:35,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:35,675 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:35,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:35,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600772070] [2021-06-04 21:50:35,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600772070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:35,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041143054] [2021-06-04 21:50:35,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:35,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-04 21:50:35,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:35,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:35,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:36,054 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:36,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041143054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:36,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:36,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-04 21:50:36,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758522538] [2021-06-04 21:50:36,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:50:36,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:36,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:50:36,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:50:36,055 INFO L87 Difference]: Start difference. First operand 3938 states and 10853 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:36,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:36,965 INFO L93 Difference]: Finished difference Result 6306 states and 15792 transitions. [2021-06-04 21:50:36,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:50:36,966 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-04 21:50:36,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:36,972 INFO L225 Difference]: With dead ends: 6306 [2021-06-04 21:50:36,972 INFO L226 Difference]: Without dead ends: 6036 [2021-06-04 21:50:36,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 1066.6ms TimeCoverageRelationStatistics Valid=1303, Invalid=3953, Unknown=0, NotChecked=0, Total=5256 [2021-06-04 21:50:36,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6036 states. [2021-06-04 21:50:37,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6036 to 4013. [2021-06-04 21:50:37,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4013 states, 4012 states have (on average 2.7612163509471586) internal successors, (11078), 4012 states have internal predecessors, (11078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:37,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4013 states to 4013 states and 11078 transitions. [2021-06-04 21:50:37,026 INFO L78 Accepts]: Start accepts. Automaton has 4013 states and 11078 transitions. Word has length 175 [2021-06-04 21:50:37,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:37,026 INFO L482 AbstractCegarLoop]: Abstraction has 4013 states and 11078 transitions. [2021-06-04 21:50:37,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:37,026 INFO L276 IsEmpty]: Start isEmpty. Operand 4013 states and 11078 transitions. [2021-06-04 21:50:37,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:37,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:37,030 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:37,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-06-04 21:50:37,230 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:37,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:37,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1482845970, now seen corresponding path program 406 times [2021-06-04 21:50:37,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:37,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558564858] [2021-06-04 21:50:37,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:37,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:37,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558564858] [2021-06-04 21:50:37,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558564858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:37,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077140387] [2021-06-04 21:50:37,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:37,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:50:37,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:37,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:37,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:37,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077140387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:37,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:37,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-04 21:50:37,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437409804] [2021-06-04 21:50:37,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:50:37,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:37,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:50:37,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:50:37,922 INFO L87 Difference]: Start difference. First operand 4013 states and 11078 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:38,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:38,797 INFO L93 Difference]: Finished difference Result 6331 states and 15917 transitions. [2021-06-04 21:50:38,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:50:38,798 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-04 21:50:38,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:38,802 INFO L225 Difference]: With dead ends: 6331 [2021-06-04 21:50:38,802 INFO L226 Difference]: Without dead ends: 6061 [2021-06-04 21:50:38,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 980.1ms TimeCoverageRelationStatistics Valid=1307, Invalid=3949, Unknown=0, NotChecked=0, Total=5256 [2021-06-04 21:50:38,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-06-04 21:50:38,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 4088. [2021-06-04 21:50:38,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4088 states, 4087 states have (on average 2.7655982383166138) internal successors, (11303), 4087 states have internal predecessors, (11303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:38,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4088 states to 4088 states and 11303 transitions. [2021-06-04 21:50:38,851 INFO L78 Accepts]: Start accepts. Automaton has 4088 states and 11303 transitions. Word has length 175 [2021-06-04 21:50:38,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:38,851 INFO L482 AbstractCegarLoop]: Abstraction has 4088 states and 11303 transitions. [2021-06-04 21:50:38,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:38,851 INFO L276 IsEmpty]: Start isEmpty. Operand 4088 states and 11303 transitions. [2021-06-04 21:50:38,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:38,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:38,855 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:39,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-06-04 21:50:39,055 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:39,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:39,055 INFO L82 PathProgramCache]: Analyzing trace with hash -16161858, now seen corresponding path program 407 times [2021-06-04 21:50:39,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:39,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550431982] [2021-06-04 21:50:39,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:39,452 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:39,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:39,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550431982] [2021-06-04 21:50:39,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550431982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:39,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852727455] [2021-06-04 21:50:39,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:39,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-04 21:50:39,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:39,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:39,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:39,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852727455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:39,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:39,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-04 21:50:39,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942872327] [2021-06-04 21:50:39,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:50:39,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:39,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:50:39,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:50:39,760 INFO L87 Difference]: Start difference. First operand 4088 states and 11303 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:40,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:40,689 INFO L93 Difference]: Finished difference Result 6356 states and 16042 transitions. [2021-06-04 21:50:40,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:50:40,689 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-04 21:50:40,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:40,695 INFO L225 Difference]: With dead ends: 6356 [2021-06-04 21:50:40,695 INFO L226 Difference]: Without dead ends: 6086 [2021-06-04 21:50:40,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 1061.7ms TimeCoverageRelationStatistics Valid=1331, Invalid=4219, Unknown=0, NotChecked=0, Total=5550 [2021-06-04 21:50:40,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2021-06-04 21:50:40,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 4163. [2021-06-04 21:50:40,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4163 states, 4162 states have (on average 2.7698222008649687) internal successors, (11528), 4162 states have internal predecessors, (11528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:40,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4163 states to 4163 states and 11528 transitions. [2021-06-04 21:50:40,748 INFO L78 Accepts]: Start accepts. Automaton has 4163 states and 11528 transitions. Word has length 175 [2021-06-04 21:50:40,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:40,748 INFO L482 AbstractCegarLoop]: Abstraction has 4163 states and 11528 transitions. [2021-06-04 21:50:40,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:40,748 INFO L276 IsEmpty]: Start isEmpty. Operand 4163 states and 11528 transitions. [2021-06-04 21:50:40,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:40,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:40,752 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:40,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-06-04 21:50:40,952 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:40,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:40,953 INFO L82 PathProgramCache]: Analyzing trace with hash -151383252, now seen corresponding path program 408 times [2021-06-04 21:50:40,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:40,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706675707] [2021-06-04 21:50:40,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:40,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:41,336 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:41,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:41,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706675707] [2021-06-04 21:50:41,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706675707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:41,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685570805] [2021-06-04 21:50:41,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:41,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-04 21:50:41,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:41,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:41,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:41,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685570805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:41,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:41,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-04 21:50:41,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006480131] [2021-06-04 21:50:41,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:50:41,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:41,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:50:41,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:50:41,658 INFO L87 Difference]: Start difference. First operand 4163 states and 11528 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:42,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:42,570 INFO L93 Difference]: Finished difference Result 6381 states and 16167 transitions. [2021-06-04 21:50:42,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:50:42,570 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-04 21:50:42,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:42,577 INFO L225 Difference]: With dead ends: 6381 [2021-06-04 21:50:42,577 INFO L226 Difference]: Without dead ends: 6111 [2021-06-04 21:50:42,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 988.8ms TimeCoverageRelationStatistics Valid=1349, Invalid=4201, Unknown=0, NotChecked=0, Total=5550 [2021-06-04 21:50:42,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6111 states. [2021-06-04 21:50:42,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6111 to 4238. [2021-06-04 21:50:42,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4238 states, 4237 states have (on average 2.773896624970498) internal successors, (11753), 4237 states have internal predecessors, (11753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:42,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4238 states to 4238 states and 11753 transitions. [2021-06-04 21:50:42,635 INFO L78 Accepts]: Start accepts. Automaton has 4238 states and 11753 transitions. Word has length 175 [2021-06-04 21:50:42,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:42,635 INFO L482 AbstractCegarLoop]: Abstraction has 4238 states and 11753 transitions. [2021-06-04 21:50:42,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:42,635 INFO L276 IsEmpty]: Start isEmpty. Operand 4238 states and 11753 transitions. [2021-06-04 21:50:42,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:42,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:42,639 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:42,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-06-04 21:50:42,854 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:42,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:42,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1028118020, now seen corresponding path program 409 times [2021-06-04 21:50:42,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:42,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392979148] [2021-06-04 21:50:42,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:42,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:43,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:43,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392979148] [2021-06-04 21:50:43,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392979148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:43,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771910258] [2021-06-04 21:50:43,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:43,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:43,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:43,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:43,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771910258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:43,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:43,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-04 21:50:43,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063362364] [2021-06-04 21:50:43,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:50:43,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:43,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:50:43,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:50:43,568 INFO L87 Difference]: Start difference. First operand 4238 states and 11753 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:44,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:44,570 INFO L93 Difference]: Finished difference Result 6406 states and 16292 transitions. [2021-06-04 21:50:44,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-04 21:50:44,570 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-04 21:50:44,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:44,576 INFO L225 Difference]: With dead ends: 6406 [2021-06-04 21:50:44,576 INFO L226 Difference]: Without dead ends: 6136 [2021-06-04 21:50:44,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 1095.9ms TimeCoverageRelationStatistics Valid=1375, Invalid=4477, Unknown=0, NotChecked=0, Total=5852 [2021-06-04 21:50:44,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6136 states. [2021-06-04 21:50:44,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6136 to 4313. [2021-06-04 21:50:44,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4313 states, 4312 states have (on average 2.777829313543599) internal successors, (11978), 4312 states have internal predecessors, (11978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:44,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4313 states to 4313 states and 11978 transitions. [2021-06-04 21:50:44,627 INFO L78 Accepts]: Start accepts. Automaton has 4313 states and 11978 transitions. Word has length 175 [2021-06-04 21:50:44,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:44,627 INFO L482 AbstractCegarLoop]: Abstraction has 4313 states and 11978 transitions. [2021-06-04 21:50:44,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:44,627 INFO L276 IsEmpty]: Start isEmpty. Operand 4313 states and 11978 transitions. [2021-06-04 21:50:44,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:44,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:44,631 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:44,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:44,831 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:44,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:44,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1529522922, now seen corresponding path program 410 times [2021-06-04 21:50:44,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:44,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295332166] [2021-06-04 21:50:44,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:45,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:45,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295332166] [2021-06-04 21:50:45,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295332166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:45,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205511391] [2021-06-04 21:50:45,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:45,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:50:45,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:45,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:45,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:45,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205511391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:45,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:45,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-04 21:50:45,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888470661] [2021-06-04 21:50:45,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:50:45,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:45,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:50:45,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:50:45,487 INFO L87 Difference]: Start difference. First operand 4313 states and 11978 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:46,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:46,465 INFO L93 Difference]: Finished difference Result 6431 states and 16417 transitions. [2021-06-04 21:50:46,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-04 21:50:46,465 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-04 21:50:46,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:46,472 INFO L225 Difference]: With dead ends: 6431 [2021-06-04 21:50:46,472 INFO L226 Difference]: Without dead ends: 6161 [2021-06-04 21:50:46,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 1019.5ms TimeCoverageRelationStatistics Valid=1407, Invalid=4445, Unknown=0, NotChecked=0, Total=5852 [2021-06-04 21:50:46,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6161 states. [2021-06-04 21:50:46,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6161 to 4388. [2021-06-04 21:50:46,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4388 states, 4387 states have (on average 2.7816275359015274) internal successors, (12203), 4387 states have internal predecessors, (12203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:46,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4388 states to 4388 states and 12203 transitions. [2021-06-04 21:50:46,530 INFO L78 Accepts]: Start accepts. Automaton has 4388 states and 12203 transitions. Word has length 175 [2021-06-04 21:50:46,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:46,530 INFO L482 AbstractCegarLoop]: Abstraction has 4388 states and 12203 transitions. [2021-06-04 21:50:46,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:46,530 INFO L276 IsEmpty]: Start isEmpty. Operand 4388 states and 12203 transitions. [2021-06-04 21:50:46,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:46,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:46,534 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:46,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-06-04 21:50:46,735 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:46,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:46,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1400896070, now seen corresponding path program 411 times [2021-06-04 21:50:46,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:46,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271922701] [2021-06-04 21:50:46,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:46,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:47,144 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:47,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:47,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271922701] [2021-06-04 21:50:47,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271922701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:47,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776016865] [2021-06-04 21:50:47,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:47,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-04 21:50:47,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:47,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:47,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:47,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776016865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:47,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:47,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-04 21:50:47,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571776775] [2021-06-04 21:50:47,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:50:47,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:47,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:50:47,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:50:47,472 INFO L87 Difference]: Start difference. First operand 4388 states and 12203 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:48,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:48,509 INFO L93 Difference]: Finished difference Result 6456 states and 16542 transitions. [2021-06-04 21:50:48,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:50:48,509 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-04 21:50:48,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:48,516 INFO L225 Difference]: With dead ends: 6456 [2021-06-04 21:50:48,516 INFO L226 Difference]: Without dead ends: 6186 [2021-06-04 21:50:48,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 1171.0ms TimeCoverageRelationStatistics Valid=1435, Invalid=4727, Unknown=0, NotChecked=0, Total=6162 [2021-06-04 21:50:48,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6186 states. [2021-06-04 21:50:48,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6186 to 4463. [2021-06-04 21:50:48,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 4462 states have (on average 2.7852980726131777) internal successors, (12428), 4462 states have internal predecessors, (12428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:48,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 12428 transitions. [2021-06-04 21:50:48,573 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 12428 transitions. Word has length 175 [2021-06-04 21:50:48,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:48,573 INFO L482 AbstractCegarLoop]: Abstraction has 4463 states and 12428 transitions. [2021-06-04 21:50:48,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:48,573 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 12428 transitions. [2021-06-04 21:50:48,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:48,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:48,577 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:48,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-06-04 21:50:48,777 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:48,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:48,777 INFO L82 PathProgramCache]: Analyzing trace with hash 616839208, now seen corresponding path program 412 times [2021-06-04 21:50:48,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:48,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517106490] [2021-06-04 21:50:48,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:49,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:49,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517106490] [2021-06-04 21:50:49,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517106490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:49,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783676448] [2021-06-04 21:50:49,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:49,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:50:49,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:49,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:49,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:49,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783676448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:49,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:49,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-04 21:50:49,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334457707] [2021-06-04 21:50:49,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:50:49,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:49,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:50:49,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:50:49,463 INFO L87 Difference]: Start difference. First operand 4463 states and 12428 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:50,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:50,436 INFO L93 Difference]: Finished difference Result 6481 states and 16667 transitions. [2021-06-04 21:50:50,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-04 21:50:50,436 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-04 21:50:50,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:50,442 INFO L225 Difference]: With dead ends: 6481 [2021-06-04 21:50:50,442 INFO L226 Difference]: Without dead ends: 6211 [2021-06-04 21:50:50,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1490 ImplicationChecksByTransitivity, 1088.4ms TimeCoverageRelationStatistics Valid=1481, Invalid=4681, Unknown=0, NotChecked=0, Total=6162 [2021-06-04 21:50:50,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6211 states. [2021-06-04 21:50:50,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6211 to 4538. [2021-06-04 21:50:50,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4538 states, 4537 states have (on average 2.7888472558959667) internal successors, (12653), 4537 states have internal predecessors, (12653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:50,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4538 states to 4538 states and 12653 transitions. [2021-06-04 21:50:50,498 INFO L78 Accepts]: Start accepts. Automaton has 4538 states and 12653 transitions. Word has length 175 [2021-06-04 21:50:50,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:50,498 INFO L482 AbstractCegarLoop]: Abstraction has 4538 states and 12653 transitions. [2021-06-04 21:50:50,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:50,499 INFO L276 IsEmpty]: Start isEmpty. Operand 4538 states and 12653 transitions. [2021-06-04 21:50:50,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:50,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:50,502 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:50,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 416 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-04 21:50:50,703 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:50,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:50,703 INFO L82 PathProgramCache]: Analyzing trace with hash -281684232, now seen corresponding path program 413 times [2021-06-04 21:50:50,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:50,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140032818] [2021-06-04 21:50:50,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:51,061 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:51,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:51,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140032818] [2021-06-04 21:50:51,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140032818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:51,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155053806] [2021-06-04 21:50:51,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:51,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-04 21:50:51,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:51,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:51,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:51,366 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:51,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155053806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:51,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:51,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-04 21:50:51,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521304210] [2021-06-04 21:50:51,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:50:51,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:51,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:50:51,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:50:51,367 INFO L87 Difference]: Start difference. First operand 4538 states and 12653 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:52,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:52,564 INFO L93 Difference]: Finished difference Result 6506 states and 16792 transitions. [2021-06-04 21:50:52,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-04 21:50:52,564 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-04 21:50:52,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:52,571 INFO L225 Difference]: With dead ends: 6506 [2021-06-04 21:50:52,571 INFO L226 Difference]: Without dead ends: 6236 [2021-06-04 21:50:52,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1524 ImplicationChecksByTransitivity, 1165.0ms TimeCoverageRelationStatistics Valid=1511, Invalid=4969, Unknown=0, NotChecked=0, Total=6480 [2021-06-04 21:50:52,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6236 states. [2021-06-04 21:50:52,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6236 to 4613. [2021-06-04 21:50:52,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 4612 states have (on average 2.7922810060711187) internal successors, (12878), 4612 states have internal predecessors, (12878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:52,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 12878 transitions. [2021-06-04 21:50:52,630 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 12878 transitions. Word has length 175 [2021-06-04 21:50:52,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:52,630 INFO L482 AbstractCegarLoop]: Abstraction has 4613 states and 12878 transitions. [2021-06-04 21:50:52,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:52,631 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 12878 transitions. [2021-06-04 21:50:52,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:52,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:52,660 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:52,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-04 21:50:52,860 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:52,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:52,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1896637722, now seen corresponding path program 414 times [2021-06-04 21:50:52,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:52,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909958281] [2021-06-04 21:50:52,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:53,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:53,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909958281] [2021-06-04 21:50:53,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909958281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:53,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300492452] [2021-06-04 21:50:53,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:53,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-04 21:50:53,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:53,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:53,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:53,496 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:53,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300492452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:53,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:53,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-04 21:50:53,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643705011] [2021-06-04 21:50:53,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:50:53,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:53,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:50:53,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:50:53,497 INFO L87 Difference]: Start difference. First operand 4613 states and 12878 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:54,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:54,474 INFO L93 Difference]: Finished difference Result 6531 states and 16917 transitions. [2021-06-04 21:50:54,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-04 21:50:54,474 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-04 21:50:54,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:54,481 INFO L225 Difference]: With dead ends: 6531 [2021-06-04 21:50:54,481 INFO L226 Difference]: Without dead ends: 6261 [2021-06-04 21:50:54,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1615 ImplicationChecksByTransitivity, 1046.0ms TimeCoverageRelationStatistics Valid=1571, Invalid=4909, Unknown=0, NotChecked=0, Total=6480 [2021-06-04 21:50:54,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6261 states. [2021-06-04 21:50:54,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6261 to 4688. [2021-06-04 21:50:54,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4688 states, 4687 states have (on average 2.795604864518882) internal successors, (13103), 4687 states have internal predecessors, (13103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:54,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4688 states to 4688 states and 13103 transitions. [2021-06-04 21:50:54,540 INFO L78 Accepts]: Start accepts. Automaton has 4688 states and 13103 transitions. Word has length 175 [2021-06-04 21:50:54,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:54,541 INFO L482 AbstractCegarLoop]: Abstraction has 4688 states and 13103 transitions. [2021-06-04 21:50:54,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:54,541 INFO L276 IsEmpty]: Start isEmpty. Operand 4688 states and 13103 transitions. [2021-06-04 21:50:54,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:54,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:54,545 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:54,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable422,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:54,745 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:54,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:54,745 INFO L82 PathProgramCache]: Analyzing trace with hash 2017885622, now seen corresponding path program 415 times [2021-06-04 21:50:54,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:54,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037088840] [2021-06-04 21:50:54,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:55,103 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:55,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:55,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037088840] [2021-06-04 21:50:55,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037088840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:55,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506119917] [2021-06-04 21:50:55,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:55,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:55,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:55,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:55,398 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:55,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506119917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:55,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:55,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-04 21:50:55,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7198248] [2021-06-04 21:50:55,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:50:55,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:55,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:50:55,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:50:55,399 INFO L87 Difference]: Start difference. First operand 4688 states and 13103 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:56,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:56,622 INFO L93 Difference]: Finished difference Result 6556 states and 17042 transitions. [2021-06-04 21:50:56,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-04 21:50:56,622 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-04 21:50:56,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:56,629 INFO L225 Difference]: With dead ends: 6556 [2021-06-04 21:50:56,629 INFO L226 Difference]: Without dead ends: 6286 [2021-06-04 21:50:56,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 1259.4ms TimeCoverageRelationStatistics Valid=1603, Invalid=5203, Unknown=0, NotChecked=0, Total=6806 [2021-06-04 21:50:56,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6286 states. [2021-06-04 21:50:56,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6286 to 4763. [2021-06-04 21:50:56,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4763 states, 4762 states have (on average 2.7988240235195296) internal successors, (13328), 4762 states have internal predecessors, (13328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:56,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4763 states to 4763 states and 13328 transitions. [2021-06-04 21:50:56,691 INFO L78 Accepts]: Start accepts. Automaton has 4763 states and 13328 transitions. Word has length 175 [2021-06-04 21:50:56,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:56,691 INFO L482 AbstractCegarLoop]: Abstraction has 4763 states and 13328 transitions. [2021-06-04 21:50:56,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:56,691 INFO L276 IsEmpty]: Start isEmpty. Operand 4763 states and 13328 transitions. [2021-06-04 21:50:56,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:56,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:56,695 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:56,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-06-04 21:50:56,896 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:56,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:56,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1652706524, now seen corresponding path program 416 times [2021-06-04 21:50:56,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:56,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113713741] [2021-06-04 21:50:56,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:57,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:57,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113713741] [2021-06-04 21:50:57,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113713741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:57,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092039853] [2021-06-04 21:50:57,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:57,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:50:57,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:57,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:57,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:57,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092039853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:57,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:57,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-04 21:50:57,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60073275] [2021-06-04 21:50:57,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:50:57,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:57,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:50:57,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:50:57,521 INFO L87 Difference]: Start difference. First operand 4763 states and 13328 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:58,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:58,588 INFO L93 Difference]: Finished difference Result 6581 states and 17167 transitions. [2021-06-04 21:50:58,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-04 21:50:58,588 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-04 21:50:58,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:58,594 INFO L225 Difference]: With dead ends: 6581 [2021-06-04 21:50:58,594 INFO L226 Difference]: Without dead ends: 6311 [2021-06-04 21:50:58,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 1097.9ms TimeCoverageRelationStatistics Valid=1677, Invalid=5129, Unknown=0, NotChecked=0, Total=6806 [2021-06-04 21:50:58,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6311 states. [2021-06-04 21:50:58,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6311 to 4838. [2021-06-04 21:50:58,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4838 states, 4837 states have (on average 2.8019433533181726) internal successors, (13553), 4837 states have internal predecessors, (13553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:58,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4838 states to 4838 states and 13553 transitions. [2021-06-04 21:50:58,654 INFO L78 Accepts]: Start accepts. Automaton has 4838 states and 13553 transitions. Word has length 175 [2021-06-04 21:50:58,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:58,655 INFO L482 AbstractCegarLoop]: Abstraction has 4838 states and 13553 transitions. [2021-06-04 21:50:58,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:58,655 INFO L276 IsEmpty]: Start isEmpty. Operand 4838 states and 13553 transitions. [2021-06-04 21:50:58,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:58,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:58,659 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:50:58,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:58,859 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:58,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:58,860 INFO L82 PathProgramCache]: Analyzing trace with hash -843654668, now seen corresponding path program 417 times [2021-06-04 21:50:58,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:58,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167730739] [2021-06-04 21:50:58,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:58,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:59,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:59,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167730739] [2021-06-04 21:50:59,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167730739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:59,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145912845] [2021-06-04 21:50:59,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:59,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-04 21:50:59,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:59,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:59,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:59,507 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:59,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145912845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:59,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:59,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-04 21:50:59,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095000545] [2021-06-04 21:50:59,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:50:59,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:59,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:50:59,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:50:59,508 INFO L87 Difference]: Start difference. First operand 4838 states and 13553 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:00,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:00,743 INFO L93 Difference]: Finished difference Result 6606 states and 17292 transitions. [2021-06-04 21:51:00,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-04 21:51:00,743 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-04 21:51:00,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:00,750 INFO L225 Difference]: With dead ends: 6606 [2021-06-04 21:51:00,750 INFO L226 Difference]: Without dead ends: 6336 [2021-06-04 21:51:00,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1784 ImplicationChecksByTransitivity, 1253.1ms TimeCoverageRelationStatistics Valid=1711, Invalid=5429, Unknown=0, NotChecked=0, Total=7140 [2021-06-04 21:51:00,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6336 states. [2021-06-04 21:51:00,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6336 to 4913. [2021-06-04 21:51:00,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4913 states, 4912 states have (on average 2.804967426710098) internal successors, (13778), 4912 states have internal predecessors, (13778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:00,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4913 states to 4913 states and 13778 transitions. [2021-06-04 21:51:00,813 INFO L78 Accepts]: Start accepts. Automaton has 4913 states and 13778 transitions. Word has length 175 [2021-06-04 21:51:00,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:00,813 INFO L482 AbstractCegarLoop]: Abstraction has 4913 states and 13778 transitions. [2021-06-04 21:51:00,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:00,813 INFO L276 IsEmpty]: Start isEmpty. Operand 4913 states and 13778 transitions. [2021-06-04 21:51:00,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:51:00,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:00,817 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:51:01,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-06-04 21:51:01,018 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:01,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:01,018 INFO L82 PathProgramCache]: Analyzing trace with hash 2059362530, now seen corresponding path program 418 times [2021-06-04 21:51:01,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:01,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238701879] [2021-06-04 21:51:01,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:01,378 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:01,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:01,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238701879] [2021-06-04 21:51:01,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238701879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:01,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342667733] [2021-06-04 21:51:01,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:01,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:51:01,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:01,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:51:01,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:01,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342667733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:01,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:01,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-04 21:51:01,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906242231] [2021-06-04 21:51:01,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:51:01,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:01,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:51:01,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:51:01,656 INFO L87 Difference]: Start difference. First operand 4913 states and 13778 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:02,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:02,733 INFO L93 Difference]: Finished difference Result 6631 states and 17417 transitions. [2021-06-04 21:51:02,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-04 21:51:02,734 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-04 21:51:02,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:02,741 INFO L225 Difference]: With dead ends: 6631 [2021-06-04 21:51:02,741 INFO L226 Difference]: Without dead ends: 6361 [2021-06-04 21:51:02,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1877 ImplicationChecksByTransitivity, 1131.1ms TimeCoverageRelationStatistics Valid=1799, Invalid=5341, Unknown=0, NotChecked=0, Total=7140 [2021-06-04 21:51:02,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2021-06-04 21:51:02,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 4988. [2021-06-04 21:51:02,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4988 states, 4987 states have (on average 2.80790054140766) internal successors, (14003), 4987 states have internal predecessors, (14003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:02,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4988 states to 4988 states and 14003 transitions. [2021-06-04 21:51:02,807 INFO L78 Accepts]: Start accepts. Automaton has 4988 states and 14003 transitions. Word has length 175 [2021-06-04 21:51:02,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:02,807 INFO L482 AbstractCegarLoop]: Abstraction has 4988 states and 14003 transitions. [2021-06-04 21:51:02,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:02,807 INFO L276 IsEmpty]: Start isEmpty. Operand 4988 states and 14003 transitions. [2021-06-04 21:51:02,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:51:02,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:02,812 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:51:03,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:03,012 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:03,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:03,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1814285234, now seen corresponding path program 419 times [2021-06-04 21:51:03,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:03,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53046214] [2021-06-04 21:51:03,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:03,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:03,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53046214] [2021-06-04 21:51:03,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53046214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:03,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524132171] [2021-06-04 21:51:03,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:03,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-04 21:51:03,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:03,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:51:03,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:03,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524132171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:03,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:03,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-04 21:51:03,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059403822] [2021-06-04 21:51:03,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:51:03,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:03,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:51:03,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:51:03,651 INFO L87 Difference]: Start difference. First operand 4988 states and 14003 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:04,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:04,954 INFO L93 Difference]: Finished difference Result 6656 states and 17542 transitions. [2021-06-04 21:51:04,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-04 21:51:04,955 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-04 21:51:04,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:04,961 INFO L225 Difference]: With dead ends: 6656 [2021-06-04 21:51:04,961 INFO L226 Difference]: Without dead ends: 6386 [2021-06-04 21:51:04,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1920 ImplicationChecksByTransitivity, 1324.4ms TimeCoverageRelationStatistics Valid=1835, Invalid=5647, Unknown=0, NotChecked=0, Total=7482 [2021-06-04 21:51:04,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6386 states. [2021-06-04 21:51:05,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6386 to 5063. [2021-06-04 21:51:05,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5063 states, 5062 states have (on average 2.8107467404188067) internal successors, (14228), 5062 states have internal predecessors, (14228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:05,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5063 states to 5063 states and 14228 transitions. [2021-06-04 21:51:05,030 INFO L78 Accepts]: Start accepts. Automaton has 5063 states and 14228 transitions. Word has length 175 [2021-06-04 21:51:05,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:05,030 INFO L482 AbstractCegarLoop]: Abstraction has 5063 states and 14228 transitions. [2021-06-04 21:51:05,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:05,030 INFO L276 IsEmpty]: Start isEmpty. Operand 5063 states and 14228 transitions. [2021-06-04 21:51:05,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:51:05,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:05,034 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:51:05,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,423 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:05,235 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:05,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:05,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1437434912, now seen corresponding path program 420 times [2021-06-04 21:51:05,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:05,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246949731] [2021-06-04 21:51:05,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:05,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:05,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246949731] [2021-06-04 21:51:05,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246949731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:05,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229439619] [2021-06-04 21:51:05,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:05,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-04 21:51:05,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:05,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:51:05,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:05,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229439619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:05,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:05,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-04 21:51:05,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129599873] [2021-06-04 21:51:05,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:51:05,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:05,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:51:05,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:51:05,860 INFO L87 Difference]: Start difference. First operand 5063 states and 14228 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:07,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:07,039 INFO L93 Difference]: Finished difference Result 6681 states and 17667 transitions. [2021-06-04 21:51:07,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-04 21:51:07,039 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-04 21:51:07,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:07,045 INFO L225 Difference]: With dead ends: 6681 [2021-06-04 21:51:07,045 INFO L226 Difference]: Without dead ends: 6411 [2021-06-04 21:51:07,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2014 ImplicationChecksByTransitivity, 1164.9ms TimeCoverageRelationStatistics Valid=1937, Invalid=5545, Unknown=0, NotChecked=0, Total=7482 [2021-06-04 21:51:07,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6411 states. [2021-06-04 21:51:07,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6411 to 5138. [2021-06-04 21:51:07,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5138 states, 5137 states have (on average 2.813509830640452) internal successors, (14453), 5137 states have internal predecessors, (14453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:07,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5138 states to 5138 states and 14453 transitions. [2021-06-04 21:51:07,115 INFO L78 Accepts]: Start accepts. Automaton has 5138 states and 14453 transitions. Word has length 175 [2021-06-04 21:51:07,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:07,115 INFO L482 AbstractCegarLoop]: Abstraction has 5138 states and 14453 transitions. [2021-06-04 21:51:07,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:07,115 INFO L276 IsEmpty]: Start isEmpty. Operand 5138 states and 14453 transitions. [2021-06-04 21:51:07,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:51:07,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:07,121 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:51:07,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:07,339 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:07,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:07,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1530776848, now seen corresponding path program 421 times [2021-06-04 21:51:07,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:07,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551620968] [2021-06-04 21:51:07,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:07,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:07,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:07,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551620968] [2021-06-04 21:51:07,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551620968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:07,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101716153] [2021-06-04 21:51:07,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:07,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:51:07,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:07,967 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:07,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101716153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:07,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:07,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-04 21:51:07,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376780920] [2021-06-04 21:51:07,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:51:07,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:07,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:51:07,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:51:07,969 INFO L87 Difference]: Start difference. First operand 5138 states and 14453 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:09,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:09,335 INFO L93 Difference]: Finished difference Result 6706 states and 17792 transitions. [2021-06-04 21:51:09,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-04 21:51:09,335 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-04 21:51:09,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:09,342 INFO L225 Difference]: With dead ends: 6706 [2021-06-04 21:51:09,342 INFO L226 Difference]: Without dead ends: 6436 [2021-06-04 21:51:09,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2060 ImplicationChecksByTransitivity, 1357.9ms TimeCoverageRelationStatistics Valid=1975, Invalid=5857, Unknown=0, NotChecked=0, Total=7832 [2021-06-04 21:51:09,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6436 states. [2021-06-04 21:51:09,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6436 to 5213. [2021-06-04 21:51:09,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5213 states, 5212 states have (on average 2.816193399846508) internal successors, (14678), 5212 states have internal predecessors, (14678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:09,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5213 states to 5213 states and 14678 transitions. [2021-06-04 21:51:09,411 INFO L78 Accepts]: Start accepts. Automaton has 5213 states and 14678 transitions. Word has length 175 [2021-06-04 21:51:09,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:09,411 INFO L482 AbstractCegarLoop]: Abstraction has 5213 states and 14678 transitions. [2021-06-04 21:51:09,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:09,411 INFO L276 IsEmpty]: Start isEmpty. Operand 5213 states and 14678 transitions. [2021-06-04 21:51:09,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:51:09,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:09,415 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:51:09,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:09,616 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:09,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:09,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1076560674, now seen corresponding path program 422 times [2021-06-04 21:51:09,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:09,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058390985] [2021-06-04 21:51:09,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:09,993 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:09,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:09,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058390985] [2021-06-04 21:51:09,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058390985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:09,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006823136] [2021-06-04 21:51:09,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:10,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:51:10,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:10,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:51:10,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:10,267 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:10,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006823136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:10,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:10,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-04 21:51:10,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039961133] [2021-06-04 21:51:10,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:51:10,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:10,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:51:10,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:51:10,268 INFO L87 Difference]: Start difference. First operand 5213 states and 14678 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:11,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:11,457 INFO L93 Difference]: Finished difference Result 6731 states and 17917 transitions. [2021-06-04 21:51:11,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-04 21:51:11,457 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-04 21:51:11,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:11,464 INFO L225 Difference]: With dead ends: 6731 [2021-06-04 21:51:11,464 INFO L226 Difference]: Without dead ends: 6461 [2021-06-04 21:51:11,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 1184.3ms TimeCoverageRelationStatistics Valid=2091, Invalid=5741, Unknown=0, NotChecked=0, Total=7832 [2021-06-04 21:51:11,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6461 states. [2021-06-04 21:51:11,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6461 to 5288. [2021-06-04 21:51:11,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5288 states, 5287 states have (on average 2.818800832229998) internal successors, (14903), 5287 states have internal predecessors, (14903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:11,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5288 states to 5288 states and 14903 transitions. [2021-06-04 21:51:11,533 INFO L78 Accepts]: Start accepts. Automaton has 5288 states and 14903 transitions. Word has length 175 [2021-06-04 21:51:11,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:11,533 INFO L482 AbstractCegarLoop]: Abstraction has 5288 states and 14903 transitions. [2021-06-04 21:51:11,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:11,534 INFO L276 IsEmpty]: Start isEmpty. Operand 5288 states and 14903 transitions. [2021-06-04 21:51:11,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:51:11,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:11,538 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:51:11,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:11,739 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:11,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:11,739 INFO L82 PathProgramCache]: Analyzing trace with hash -77664338, now seen corresponding path program 423 times [2021-06-04 21:51:11,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:11,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702889334] [2021-06-04 21:51:11,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:12,076 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:12,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:12,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702889334] [2021-06-04 21:51:12,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702889334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:12,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644543483] [2021-06-04 21:51:12,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:12,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-04 21:51:12,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:12,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:51:12,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:12,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644543483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:12,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:12,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-04 21:51:12,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179096277] [2021-06-04 21:51:12,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:51:12,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:12,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:51:12,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:51:12,403 INFO L87 Difference]: Start difference. First operand 5288 states and 14903 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:13,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:13,833 INFO L93 Difference]: Finished difference Result 6756 states and 18042 transitions. [2021-06-04 21:51:13,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-04 21:51:13,833 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-04 21:51:13,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:13,840 INFO L225 Difference]: With dead ends: 6756 [2021-06-04 21:51:13,841 INFO L226 Difference]: Without dead ends: 6486 [2021-06-04 21:51:13,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2204 ImplicationChecksByTransitivity, 1419.4ms TimeCoverageRelationStatistics Valid=2131, Invalid=6059, Unknown=0, NotChecked=0, Total=8190 [2021-06-04 21:51:13,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6486 states. [2021-06-04 21:51:13,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6486 to 5363. [2021-06-04 21:51:13,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5363 states, 5362 states have (on average 2.8213353226408056) internal successors, (15128), 5362 states have internal predecessors, (15128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:13,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5363 states to 5363 states and 15128 transitions. [2021-06-04 21:51:13,912 INFO L78 Accepts]: Start accepts. Automaton has 5363 states and 15128 transitions. Word has length 175 [2021-06-04 21:51:13,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:13,912 INFO L482 AbstractCegarLoop]: Abstraction has 5363 states and 15128 transitions. [2021-06-04 21:51:13,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:13,912 INFO L276 IsEmpty]: Start isEmpty. Operand 5363 states and 15128 transitions. [2021-06-04 21:51:13,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:51:13,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:13,916 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:51:14,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-06-04 21:51:14,117 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:14,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:14,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1956992228, now seen corresponding path program 424 times [2021-06-04 21:51:14,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:14,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440333992] [2021-06-04 21:51:14,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:14,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:14,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440333992] [2021-06-04 21:51:14,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440333992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:14,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216571381] [2021-06-04 21:51:14,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:14,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:51:14,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:14,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:51:14,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:14,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216571381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:14,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:14,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-04 21:51:14,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482959501] [2021-06-04 21:51:14,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:51:14,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:14,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:51:14,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:51:14,757 INFO L87 Difference]: Start difference. First operand 5363 states and 15128 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:15,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:15,996 INFO L93 Difference]: Finished difference Result 6781 states and 18167 transitions. [2021-06-04 21:51:15,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-04 21:51:15,997 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-04 21:51:15,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:16,003 INFO L225 Difference]: With dead ends: 6781 [2021-06-04 21:51:16,003 INFO L226 Difference]: Without dead ends: 6511 [2021-06-04 21:51:16,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2300 ImplicationChecksByTransitivity, 1260.1ms TimeCoverageRelationStatistics Valid=2261, Invalid=5929, Unknown=0, NotChecked=0, Total=8190 [2021-06-04 21:51:16,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6511 states. [2021-06-04 21:51:16,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6511 to 5438. [2021-06-04 21:51:16,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5438 states, 5437 states have (on average 2.823799889645025) internal successors, (15353), 5437 states have internal predecessors, (15353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:16,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5438 states to 5438 states and 15353 transitions. [2021-06-04 21:51:16,073 INFO L78 Accepts]: Start accepts. Automaton has 5438 states and 15353 transitions. Word has length 175 [2021-06-04 21:51:16,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:16,073 INFO L482 AbstractCegarLoop]: Abstraction has 5438 states and 15353 transitions. [2021-06-04 21:51:16,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:16,073 INFO L276 IsEmpty]: Start isEmpty. Operand 5438 states and 15353 transitions. [2021-06-04 21:51:16,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:51:16,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:16,078 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:51:16,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 428 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-04 21:51:16,278 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:16,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:16,278 INFO L82 PathProgramCache]: Analyzing trace with hash 73327084, now seen corresponding path program 425 times [2021-06-04 21:51:16,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:16,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067341909] [2021-06-04 21:51:16,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:16,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:16,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:16,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067341909] [2021-06-04 21:51:16,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067341909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:16,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389162727] [2021-06-04 21:51:16,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:16,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-04 21:51:16,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:16,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:51:16,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:16,907 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:16,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389162727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:16,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:16,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-04 21:51:16,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132453402] [2021-06-04 21:51:16,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:51:16,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:16,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:51:16,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:51:16,908 INFO L87 Difference]: Start difference. First operand 5438 states and 15353 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:18,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:18,410 INFO L93 Difference]: Finished difference Result 6806 states and 18292 transitions. [2021-06-04 21:51:18,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-04 21:51:18,410 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-04 21:51:18,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:18,416 INFO L225 Difference]: With dead ends: 6806 [2021-06-04 21:51:18,417 INFO L226 Difference]: Without dead ends: 6536 [2021-06-04 21:51:18,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 1477.7ms TimeCoverageRelationStatistics Valid=2303, Invalid=6253, Unknown=0, NotChecked=0, Total=8556 [2021-06-04 21:51:18,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6536 states. [2021-06-04 21:51:18,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6536 to 5513. [2021-06-04 21:51:18,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5513 states, 5512 states have (on average 2.826197387518142) internal successors, (15578), 5512 states have internal predecessors, (15578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:18,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5513 states to 5513 states and 15578 transitions. [2021-06-04 21:51:18,487 INFO L78 Accepts]: Start accepts. Automaton has 5513 states and 15578 transitions. Word has length 175 [2021-06-04 21:51:18,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:18,487 INFO L482 AbstractCegarLoop]: Abstraction has 5513 states and 15578 transitions. [2021-06-04 21:51:18,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:18,487 INFO L276 IsEmpty]: Start isEmpty. Operand 5513 states and 15578 transitions. [2021-06-04 21:51:18,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:51:18,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:18,492 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:51:18,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-04 21:51:18,693 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:18,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:18,693 INFO L82 PathProgramCache]: Analyzing trace with hash 687566554, now seen corresponding path program 426 times [2021-06-04 21:51:18,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:18,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142759938] [2021-06-04 21:51:18,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:19,089 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:19,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:19,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142759938] [2021-06-04 21:51:19,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142759938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:19,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379753260] [2021-06-04 21:51:19,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:19,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-04 21:51:19,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:19,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:51:19,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:19,367 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:19,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379753260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:19,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:19,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-04 21:51:19,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950694340] [2021-06-04 21:51:19,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:51:19,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:19,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:51:19,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:51:19,368 INFO L87 Difference]: Start difference. First operand 5513 states and 15578 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:20,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:20,663 INFO L93 Difference]: Finished difference Result 6831 states and 18417 transitions. [2021-06-04 21:51:20,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-04 21:51:20,663 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-04 21:51:20,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:20,671 INFO L225 Difference]: With dead ends: 6831 [2021-06-04 21:51:20,671 INFO L226 Difference]: Without dead ends: 6561 [2021-06-04 21:51:20,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2449 ImplicationChecksByTransitivity, 1318.6ms TimeCoverageRelationStatistics Valid=2447, Invalid=6109, Unknown=0, NotChecked=0, Total=8556 [2021-06-04 21:51:20,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6561 states. [2021-06-04 21:51:20,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6561 to 5588. [2021-06-04 21:51:20,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5588 states, 5587 states have (on average 2.828530517272239) internal successors, (15803), 5587 states have internal predecessors, (15803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:20,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5588 states to 5588 states and 15803 transitions. [2021-06-04 21:51:20,746 INFO L78 Accepts]: Start accepts. Automaton has 5588 states and 15803 transitions. Word has length 175 [2021-06-04 21:51:20,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:20,746 INFO L482 AbstractCegarLoop]: Abstraction has 5588 states and 15803 transitions. [2021-06-04 21:51:20,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:20,746 INFO L276 IsEmpty]: Start isEmpty. Operand 5588 states and 15803 transitions. [2021-06-04 21:51:20,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:51:20,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:20,784 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:51:20,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:20,984 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:20,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:20,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1027675734, now seen corresponding path program 427 times [2021-06-04 21:51:20,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:20,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193569147] [2021-06-04 21:51:20,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:20,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:21,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:21,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193569147] [2021-06-04 21:51:21,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193569147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:21,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979516231] [2021-06-04 21:51:21,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:21,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:51:21,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:21,650 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:21,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979516231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:21,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:21,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-04 21:51:21,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310145598] [2021-06-04 21:51:21,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:51:21,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:21,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:51:21,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:51:21,651 INFO L87 Difference]: Start difference. First operand 5588 states and 15803 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:23,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:23,233 INFO L93 Difference]: Finished difference Result 6916 states and 18707 transitions. [2021-06-04 21:51:23,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-04 21:51:23,233 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-04 21:51:23,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:23,241 INFO L225 Difference]: With dead ends: 6916 [2021-06-04 21:51:23,241 INFO L226 Difference]: Without dead ends: 6646 [2021-06-04 21:51:23,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2504 ImplicationChecksByTransitivity, 1569.7ms TimeCoverageRelationStatistics Valid=2491, Invalid=6439, Unknown=0, NotChecked=0, Total=8930 [2021-06-04 21:51:23,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6646 states. [2021-06-04 21:51:23,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6646 to 5663. [2021-06-04 21:51:23,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5663 states, 5662 states have (on average 2.834334157541505) internal successors, (16048), 5662 states have internal predecessors, (16048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:23,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5663 states to 5663 states and 16048 transitions. [2021-06-04 21:51:23,311 INFO L78 Accepts]: Start accepts. Automaton has 5663 states and 16048 transitions. Word has length 175 [2021-06-04 21:51:23,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:23,311 INFO L482 AbstractCegarLoop]: Abstraction has 5663 states and 16048 transitions. [2021-06-04 21:51:23,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:23,311 INFO L276 IsEmpty]: Start isEmpty. Operand 5663 states and 16048 transitions. [2021-06-04 21:51:23,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:51:23,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:23,317 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:51:23,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-06-04 21:51:23,517 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:23,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:23,518 INFO L82 PathProgramCache]: Analyzing trace with hash -2060323336, now seen corresponding path program 428 times [2021-06-04 21:51:23,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:23,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188126243] [2021-06-04 21:51:23,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:23,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:23,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188126243] [2021-06-04 21:51:23,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188126243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:23,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659873260] [2021-06-04 21:51:23,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:23,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:51:23,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:23,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:51:23,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:24,149 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:24,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659873260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:24,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:24,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-04 21:51:24,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210259453] [2021-06-04 21:51:24,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:51:24,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:24,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:51:24,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=860, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:51:24,150 INFO L87 Difference]: Start difference. First operand 5663 states and 16048 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:25,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:25,457 INFO L93 Difference]: Finished difference Result 7658 states and 20831 transitions. [2021-06-04 21:51:25,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-04 21:51:25,458 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-04 21:51:25,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:25,466 INFO L225 Difference]: With dead ends: 7658 [2021-06-04 21:51:25,466 INFO L226 Difference]: Without dead ends: 7388 [2021-06-04 21:51:25,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2601 ImplicationChecksByTransitivity, 1318.6ms TimeCoverageRelationStatistics Valid=2650, Invalid=6280, Unknown=0, NotChecked=0, Total=8930 [2021-06-04 21:51:25,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7388 states. [2021-06-04 21:51:25,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7388 to 5843. [2021-06-04 21:51:25,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5843 states, 5842 states have (on average 2.842690859294762) internal successors, (16607), 5842 states have internal predecessors, (16607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:25,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5843 states to 5843 states and 16607 transitions. [2021-06-04 21:51:25,539 INFO L78 Accepts]: Start accepts. Automaton has 5843 states and 16607 transitions. Word has length 175 [2021-06-04 21:51:25,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:25,539 INFO L482 AbstractCegarLoop]: Abstraction has 5843 states and 16607 transitions. [2021-06-04 21:51:25,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:25,539 INFO L276 IsEmpty]: Start isEmpty. Operand 5843 states and 16607 transitions. [2021-06-04 21:51:25,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:51:25,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:25,544 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:51:25,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-04 21:51:25,745 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:25,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:25,745 INFO L82 PathProgramCache]: Analyzing trace with hash -2037980086, now seen corresponding path program 429 times [2021-06-04 21:51:25,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:25,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883066625] [2021-06-04 21:51:25,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:26,098 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:26,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:26,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883066625] [2021-06-04 21:51:26,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883066625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:26,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654270443] [2021-06-04 21:51:26,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:26,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-04 21:51:26,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:26,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:51:26,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:26,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654270443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:26,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:26,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-04 21:51:26,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234915506] [2021-06-04 21:51:26,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:51:26,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:26,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:51:26,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=992, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:51:26,424 INFO L87 Difference]: Start difference. First operand 5843 states and 16607 transitions. Second operand has 36 states, 36 states have (on average 4.944444444444445) internal successors, (178), 36 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:28,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:28,095 INFO L93 Difference]: Finished difference Result 7526 states and 20496 transitions. [2021-06-04 21:51:28,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-04 21:51:28,095 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.944444444444445) internal successors, (178), 36 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-04 21:51:28,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:28,103 INFO L225 Difference]: With dead ends: 7526 [2021-06-04 21:51:28,103 INFO L226 Difference]: Without dead ends: 6951 [2021-06-04 21:51:28,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2911 ImplicationChecksByTransitivity, 1663.6ms TimeCoverageRelationStatistics Valid=2786, Invalid=7314, Unknown=0, NotChecked=0, Total=10100 [2021-06-04 21:51:28,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6951 states. [2021-06-04 21:51:28,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6951 to 5878. [2021-06-04 21:51:28,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5878 states, 5877 states have (on average 2.8386932108218477) internal successors, (16683), 5877 states have internal predecessors, (16683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:28,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5878 states to 5878 states and 16683 transitions. [2021-06-04 21:51:28,171 INFO L78 Accepts]: Start accepts. Automaton has 5878 states and 16683 transitions. Word has length 175 [2021-06-04 21:51:28,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:28,171 INFO L482 AbstractCegarLoop]: Abstraction has 5878 states and 16683 transitions. [2021-06-04 21:51:28,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.944444444444445) internal successors, (178), 36 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:28,172 INFO L276 IsEmpty]: Start isEmpty. Operand 5878 states and 16683 transitions. [2021-06-04 21:51:28,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:28,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:28,177 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:51:28,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-06-04 21:51:28,377 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:28,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:28,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1789996418, now seen corresponding path program 430 times [2021-06-04 21:51:28,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:28,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543188162] [2021-06-04 21:51:28,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:28,795 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:28,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:28,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543188162] [2021-06-04 21:51:28,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543188162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:28,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414919817] [2021-06-04 21:51:28,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:28,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:51:28,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:28,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:51:28,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:29,132 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:29,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414919817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:29,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:29,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 38 [2021-06-04 21:51:29,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688005756] [2021-06-04 21:51:29,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:51:29,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:29,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:51:29,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1088, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:51:29,133 INFO L87 Difference]: Start difference. First operand 5878 states and 16683 transitions. Second operand has 38 states, 38 states have (on average 5.473684210526316) internal successors, (208), 38 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:30,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:30,043 INFO L93 Difference]: Finished difference Result 7268 states and 19783 transitions. [2021-06-04 21:51:30,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:51:30,043 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.473684210526316) internal successors, (208), 38 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:51:30,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:30,050 INFO L225 Difference]: With dead ends: 7268 [2021-06-04 21:51:30,051 INFO L226 Difference]: Without dead ends: 6934 [2021-06-04 21:51:30,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1081.7ms TimeCoverageRelationStatistics Valid=1485, Invalid=3917, Unknown=0, NotChecked=0, Total=5402 [2021-06-04 21:51:30,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6934 states. [2021-06-04 21:51:30,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6934 to 5963. [2021-06-04 21:51:30,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5963 states, 5962 states have (on average 2.8267359946326738) internal successors, (16853), 5962 states have internal predecessors, (16853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:30,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5963 states to 5963 states and 16853 transitions. [2021-06-04 21:51:30,118 INFO L78 Accepts]: Start accepts. Automaton has 5963 states and 16853 transitions. Word has length 180 [2021-06-04 21:51:30,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:30,118 INFO L482 AbstractCegarLoop]: Abstraction has 5963 states and 16853 transitions. [2021-06-04 21:51:30,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.473684210526316) internal successors, (208), 38 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:30,118 INFO L276 IsEmpty]: Start isEmpty. Operand 5963 states and 16853 transitions. [2021-06-04 21:51:30,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:30,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:30,123 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:51:30,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:30,324 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:30,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:30,324 INFO L82 PathProgramCache]: Analyzing trace with hash 308357446, now seen corresponding path program 431 times [2021-06-04 21:51:30,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:30,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353502034] [2021-06-04 21:51:30,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:30,748 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:30,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:30,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353502034] [2021-06-04 21:51:30,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353502034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:30,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518664239] [2021-06-04 21:51:30,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:30,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-04 21:51:30,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:30,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:30,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:31,049 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:31,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518664239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:31,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:31,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-04 21:51:31,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43653931] [2021-06-04 21:51:31,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:51:31,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:31,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:51:31,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:51:31,050 INFO L87 Difference]: Start difference. First operand 5963 states and 16853 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:31,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:31,758 INFO L93 Difference]: Finished difference Result 8561 states and 22177 transitions. [2021-06-04 21:51:31,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:51:31,759 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:51:31,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:31,768 INFO L225 Difference]: With dead ends: 8561 [2021-06-04 21:51:31,768 INFO L226 Difference]: Without dead ends: 8291 [2021-06-04 21:51:31,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 903.9ms TimeCoverageRelationStatistics Valid=1286, Invalid=3270, Unknown=0, NotChecked=0, Total=4556 [2021-06-04 21:51:31,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8291 states. [2021-06-04 21:51:31,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8291 to 5978. [2021-06-04 21:51:31,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:31,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:31,842 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:31,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:31,842 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:31,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:31,842 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:31,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:31,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:31,847 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:51:32,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable439 [2021-06-04 21:51:32,047 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:32,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:32,048 INFO L82 PathProgramCache]: Analyzing trace with hash -839634922, now seen corresponding path program 432 times [2021-06-04 21:51:32,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:32,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736421846] [2021-06-04 21:51:32,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:32,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:32,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:32,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736421846] [2021-06-04 21:51:32,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736421846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:32,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646869472] [2021-06-04 21:51:32,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:32,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-04 21:51:32,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:32,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:32,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:32,855 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:32,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646869472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:32,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:32,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:51:32,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009664040] [2021-06-04 21:51:32,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:51:32,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:32,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:51:32,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=993, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:51:32,857 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:33,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:33,661 INFO L93 Difference]: Finished difference Result 8446 states and 21947 transitions. [2021-06-04 21:51:33,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:51:33,661 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:51:33,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:33,670 INFO L225 Difference]: With dead ends: 8446 [2021-06-04 21:51:33,670 INFO L226 Difference]: Without dead ends: 8176 [2021-06-04 21:51:33,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1049.9ms TimeCoverageRelationStatistics Valid=1373, Invalid=3739, Unknown=0, NotChecked=0, Total=5112 [2021-06-04 21:51:33,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8176 states. [2021-06-04 21:51:33,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8176 to 5978. [2021-06-04 21:51:33,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:33,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:33,744 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:33,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:33,744 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:33,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:33,744 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:33,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:33,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:33,749 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:51:33,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:33,950 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:33,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:33,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1590602500, now seen corresponding path program 433 times [2021-06-04 21:51:33,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:33,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876734758] [2021-06-04 21:51:33,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:34,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:34,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876734758] [2021-06-04 21:51:34,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876734758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:34,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487207837] [2021-06-04 21:51:34,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:34,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:34,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:34,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487207837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:34,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:34,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-04 21:51:34,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011781322] [2021-06-04 21:51:34,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:51:34,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:34,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:51:34,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:51:34,656 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:35,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:35,447 INFO L93 Difference]: Finished difference Result 8421 states and 21897 transitions. [2021-06-04 21:51:35,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:51:35,447 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:51:35,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:35,457 INFO L225 Difference]: With dead ends: 8421 [2021-06-04 21:51:35,457 INFO L226 Difference]: Without dead ends: 8151 [2021-06-04 21:51:35,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 959.0ms TimeCoverageRelationStatistics Valid=1281, Invalid=3549, Unknown=0, NotChecked=0, Total=4830 [2021-06-04 21:51:35,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8151 states. [2021-06-04 21:51:35,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8151 to 5978. [2021-06-04 21:51:35,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:35,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:35,534 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:35,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:35,534 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:35,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:35,534 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:35,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:35,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:35,539 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:51:35,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-04 21:51:35,740 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:35,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:35,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2006649388, now seen corresponding path program 434 times [2021-06-04 21:51:35,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:35,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612167136] [2021-06-04 21:51:35,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:35,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:36,170 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:36,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:36,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612167136] [2021-06-04 21:51:36,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612167136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:36,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636414408] [2021-06-04 21:51:36,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:36,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:51:36,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:36,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:36,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:36,481 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:36,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636414408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:36,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:36,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:51:36,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537344384] [2021-06-04 21:51:36,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:51:36,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:36,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:51:36,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:51:36,482 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:37,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:37,450 INFO L93 Difference]: Finished difference Result 8371 states and 21797 transitions. [2021-06-04 21:51:37,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:51:37,450 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:51:37,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:37,459 INFO L225 Difference]: With dead ends: 8371 [2021-06-04 21:51:37,459 INFO L226 Difference]: Without dead ends: 8101 [2021-06-04 21:51:37,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 1120.4ms TimeCoverageRelationStatistics Valid=1376, Invalid=4026, Unknown=0, NotChecked=0, Total=5402 [2021-06-04 21:51:37,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8101 states. [2021-06-04 21:51:37,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8101 to 5978. [2021-06-04 21:51:37,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:37,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:37,568 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:37,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:37,568 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:37,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:37,568 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:37,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:37,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:37,573 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:51:37,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-04 21:51:37,773 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:37,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:37,774 INFO L82 PathProgramCache]: Analyzing trace with hash 568435266, now seen corresponding path program 435 times [2021-06-04 21:51:37,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:37,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746222981] [2021-06-04 21:51:37,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:38,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:38,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746222981] [2021-06-04 21:51:38,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746222981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:38,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724876543] [2021-06-04 21:51:38,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:38,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-04 21:51:38,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:38,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:38,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:38,480 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:38,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724876543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:38,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:38,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-04 21:51:38,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999819057] [2021-06-04 21:51:38,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:51:38,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:38,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:51:38,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:51:38,481 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:39,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:39,368 INFO L93 Difference]: Finished difference Result 8321 states and 21697 transitions. [2021-06-04 21:51:39,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:51:39,368 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:51:39,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:39,377 INFO L225 Difference]: With dead ends: 8321 [2021-06-04 21:51:39,377 INFO L226 Difference]: Without dead ends: 8051 [2021-06-04 21:51:39,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 961.6ms TimeCoverageRelationStatistics Valid=1292, Invalid=3820, Unknown=0, NotChecked=0, Total=5112 [2021-06-04 21:51:39,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8051 states. [2021-06-04 21:51:39,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8051 to 5978. [2021-06-04 21:51:39,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:39,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:39,450 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:39,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:39,450 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:39,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:39,450 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:39,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:39,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:39,455 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:51:39,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 439 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-04 21:51:39,656 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:39,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:39,656 INFO L82 PathProgramCache]: Analyzing trace with hash 67121426, now seen corresponding path program 436 times [2021-06-04 21:51:39,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:39,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394339118] [2021-06-04 21:51:39,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:39,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:40,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:40,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394339118] [2021-06-04 21:51:40,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394339118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:40,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742915554] [2021-06-04 21:51:40,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:40,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:51:40,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:40,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:40,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:40,436 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:40,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742915554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:40,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:40,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:51:40,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089853983] [2021-06-04 21:51:40,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:51:40,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:40,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:51:40,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1039, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:51:40,437 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:41,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:41,427 INFO L93 Difference]: Finished difference Result 8271 states and 21597 transitions. [2021-06-04 21:51:41,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:51:41,428 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:51:41,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:41,437 INFO L225 Difference]: With dead ends: 8271 [2021-06-04 21:51:41,437 INFO L226 Difference]: Without dead ends: 8001 [2021-06-04 21:51:41,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1098.4ms TimeCoverageRelationStatistics Valid=1395, Invalid=4305, Unknown=0, NotChecked=0, Total=5700 [2021-06-04 21:51:41,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8001 states. [2021-06-04 21:51:41,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8001 to 5978. [2021-06-04 21:51:41,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:41,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:41,509 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:41,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:41,510 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:41,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:41,510 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:41,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:41,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:41,515 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:51:41,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 440 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-04 21:51:41,715 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:41,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:41,716 INFO L82 PathProgramCache]: Analyzing trace with hash 543616768, now seen corresponding path program 437 times [2021-06-04 21:51:41,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:41,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947191523] [2021-06-04 21:51:41,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:42,131 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:42,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:42,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947191523] [2021-06-04 21:51:42,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947191523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:42,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66337835] [2021-06-04 21:51:42,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:42,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-04 21:51:42,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:42,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:42,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:42,431 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:42,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66337835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:42,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:42,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-04 21:51:42,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510536836] [2021-06-04 21:51:42,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:51:42,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:42,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:51:42,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:51:42,432 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:43,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:43,363 INFO L93 Difference]: Finished difference Result 8221 states and 21497 transitions. [2021-06-04 21:51:43,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:51:43,363 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:51:43,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:43,371 INFO L225 Difference]: With dead ends: 8221 [2021-06-04 21:51:43,371 INFO L226 Difference]: Without dead ends: 7951 [2021-06-04 21:51:43,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1012.6ms TimeCoverageRelationStatistics Valid=1319, Invalid=4083, Unknown=0, NotChecked=0, Total=5402 [2021-06-04 21:51:43,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7951 states. [2021-06-04 21:51:43,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7951 to 5978. [2021-06-04 21:51:43,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:43,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:43,448 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:43,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:43,448 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:43,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:43,448 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:43,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:43,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:43,468 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:51:43,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-06-04 21:51:43,689 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:43,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:43,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2010300880, now seen corresponding path program 438 times [2021-06-04 21:51:43,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:43,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284464374] [2021-06-04 21:51:43,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:43,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:44,102 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:44,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:44,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284464374] [2021-06-04 21:51:44,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284464374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:44,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548516017] [2021-06-04 21:51:44,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:44,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-04 21:51:44,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:44,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:44,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:44,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548516017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:44,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:44,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:51:44,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104477053] [2021-06-04 21:51:44,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:51:44,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:44,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:51:44,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:51:44,454 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:45,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:45,448 INFO L93 Difference]: Finished difference Result 8171 states and 21397 transitions. [2021-06-04 21:51:45,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-04 21:51:45,449 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:51:45,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:45,459 INFO L225 Difference]: With dead ends: 8171 [2021-06-04 21:51:45,459 INFO L226 Difference]: Without dead ends: 7901 [2021-06-04 21:51:45,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 1134.4ms TimeCoverageRelationStatistics Valid=1430, Invalid=4576, Unknown=0, NotChecked=0, Total=6006 [2021-06-04 21:51:45,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7901 states. [2021-06-04 21:51:45,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7901 to 5978. [2021-06-04 21:51:45,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:45,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:45,538 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:45,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:45,538 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:45,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:45,539 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:45,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:45,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:45,544 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:51:45,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:45,744 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:45,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:45,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1875079486, now seen corresponding path program 439 times [2021-06-04 21:51:45,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:45,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637336321] [2021-06-04 21:51:45,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:45,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:46,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:46,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637336321] [2021-06-04 21:51:46,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637336321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:46,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980576818] [2021-06-04 21:51:46,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:46,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:46,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:46,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:46,458 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:46,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980576818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:46,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:46,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-04 21:51:46,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140980441] [2021-06-04 21:51:46,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:51:46,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:46,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:51:46,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:51:46,460 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:47,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:47,426 INFO L93 Difference]: Finished difference Result 8121 states and 21297 transitions. [2021-06-04 21:51:47,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:51:47,426 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:51:47,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:47,435 INFO L225 Difference]: With dead ends: 8121 [2021-06-04 21:51:47,435 INFO L226 Difference]: Without dead ends: 7851 [2021-06-04 21:51:47,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 1013.0ms TimeCoverageRelationStatistics Valid=1362, Invalid=4338, Unknown=0, NotChecked=0, Total=5700 [2021-06-04 21:51:47,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7851 states. [2021-06-04 21:51:47,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7851 to 5978. [2021-06-04 21:51:47,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:47,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:47,507 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:47,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:47,508 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:47,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:47,508 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:47,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:47,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:47,513 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:51:47,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-06-04 21:51:47,713 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:47,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:47,713 INFO L82 PathProgramCache]: Analyzing trace with hash 998344718, now seen corresponding path program 440 times [2021-06-04 21:51:47,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:47,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248802884] [2021-06-04 21:51:47,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:47,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:48,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:48,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248802884] [2021-06-04 21:51:48,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248802884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:48,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384383893] [2021-06-04 21:51:48,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:48,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:51:48,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:48,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:48,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:48,457 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:48,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384383893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:48,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:48,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:51:48,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123597945] [2021-06-04 21:51:48,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:51:48,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:48,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:51:48,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:51:48,458 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:49,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:49,587 INFO L93 Difference]: Finished difference Result 8071 states and 21197 transitions. [2021-06-04 21:51:49,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:51:49,587 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:51:49,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:49,595 INFO L225 Difference]: With dead ends: 8071 [2021-06-04 21:51:49,596 INFO L226 Difference]: Without dead ends: 7801 [2021-06-04 21:51:49,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 1176.5ms TimeCoverageRelationStatistics Valid=1481, Invalid=4839, Unknown=0, NotChecked=0, Total=6320 [2021-06-04 21:51:49,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7801 states. [2021-06-04 21:51:49,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7801 to 5978. [2021-06-04 21:51:49,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:49,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:49,666 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:49,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:49,666 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:49,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:49,666 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:49,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:49,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:49,671 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:51:49,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-06-04 21:51:49,872 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:49,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:49,872 INFO L82 PathProgramCache]: Analyzing trace with hash -738981636, now seen corresponding path program 441 times [2021-06-04 21:51:49,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:49,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648263969] [2021-06-04 21:51:49,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:50,243 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:50,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:50,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648263969] [2021-06-04 21:51:50,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648263969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:50,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337804318] [2021-06-04 21:51:50,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:50,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-04 21:51:50,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:50,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:50,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:50,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337804318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:50,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:50,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-04 21:51:50,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268000155] [2021-06-04 21:51:50,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:51:50,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:50,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:51:50,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:51:50,561 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:51,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:51,536 INFO L93 Difference]: Finished difference Result 8021 states and 21097 transitions. [2021-06-04 21:51:51,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-04 21:51:51,537 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:51:51,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:51,543 INFO L225 Difference]: With dead ends: 8021 [2021-06-04 21:51:51,544 INFO L226 Difference]: Without dead ends: 7751 [2021-06-04 21:51:51,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 1061.0ms TimeCoverageRelationStatistics Valid=1421, Invalid=4585, Unknown=0, NotChecked=0, Total=6006 [2021-06-04 21:51:51,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7751 states. [2021-06-04 21:51:51,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7751 to 5978. [2021-06-04 21:51:51,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:51,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:51,611 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:51,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:51,611 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:51,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:51,611 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:51,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:51,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:51,616 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:51:51,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-06-04 21:51:51,816 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:51,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:51,817 INFO L82 PathProgramCache]: Analyzing trace with hash 625566668, now seen corresponding path program 442 times [2021-06-04 21:51:51,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:51,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83167050] [2021-06-04 21:51:51,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:52,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:52,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83167050] [2021-06-04 21:51:52,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83167050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:52,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960643704] [2021-06-04 21:51:52,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:52,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:51:52,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:52,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:52,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:52,511 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:52,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960643704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:52,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:52,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:51:52,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420126881] [2021-06-04 21:51:52,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:51:52,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:52,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:51:52,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1078, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:51:52,512 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:53,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:53,650 INFO L93 Difference]: Finished difference Result 7971 states and 20997 transitions. [2021-06-04 21:51:53,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-04 21:51:53,651 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:51:53,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:53,659 INFO L225 Difference]: With dead ends: 7971 [2021-06-04 21:51:53,659 INFO L226 Difference]: Without dead ends: 7701 [2021-06-04 21:51:53,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 1222.7ms TimeCoverageRelationStatistics Valid=1548, Invalid=5094, Unknown=0, NotChecked=0, Total=6642 [2021-06-04 21:51:53,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7701 states. [2021-06-04 21:51:53,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7701 to 5978. [2021-06-04 21:51:53,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:53,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:53,732 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:53,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:53,732 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:53,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:53,733 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:53,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:53,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:53,738 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:51:53,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:53,938 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:53,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:53,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1651665350, now seen corresponding path program 443 times [2021-06-04 21:51:53,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:53,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560687012] [2021-06-04 21:51:53,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:54,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:54,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560687012] [2021-06-04 21:51:54,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560687012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:54,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920036892] [2021-06-04 21:51:54,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:54,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-04 21:51:54,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:54,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:54,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:54,641 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:54,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920036892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:54,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:54,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-04 21:51:54,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642722425] [2021-06-04 21:51:54,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:51:54,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:54,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:51:54,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:51:54,642 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:55,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:55,662 INFO L93 Difference]: Finished difference Result 7921 states and 20897 transitions. [2021-06-04 21:51:55,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-04 21:51:55,662 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:51:55,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:55,671 INFO L225 Difference]: With dead ends: 7921 [2021-06-04 21:51:55,671 INFO L226 Difference]: Without dead ends: 7651 [2021-06-04 21:51:55,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1434 ImplicationChecksByTransitivity, 1087.3ms TimeCoverageRelationStatistics Valid=1496, Invalid=4824, Unknown=0, NotChecked=0, Total=6320 [2021-06-04 21:51:55,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7651 states. [2021-06-04 21:51:55,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7651 to 5978. [2021-06-04 21:51:55,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:55,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:55,744 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:55,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:55,744 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:55,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:55,745 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:55,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:55,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:55,750 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:51:55,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,447 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:55,950 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:55,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:55,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1744778506, now seen corresponding path program 444 times [2021-06-04 21:51:55,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:55,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485929576] [2021-06-04 21:51:55,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:56,329 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:56,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:56,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485929576] [2021-06-04 21:51:56,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485929576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:56,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639335128] [2021-06-04 21:51:56,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:56,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-04 21:51:56,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:56,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:56,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:56,686 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:56,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639335128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:56,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:56,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:51:56,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054413765] [2021-06-04 21:51:56,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:51:56,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:56,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:51:56,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:51:56,687 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:57,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:57,870 INFO L93 Difference]: Finished difference Result 7871 states and 20797 transitions. [2021-06-04 21:51:57,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-04 21:51:57,870 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:51:57,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:57,878 INFO L225 Difference]: With dead ends: 7871 [2021-06-04 21:51:57,878 INFO L226 Difference]: Without dead ends: 7601 [2021-06-04 21:51:57,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 1273.4ms TimeCoverageRelationStatistics Valid=1631, Invalid=5341, Unknown=0, NotChecked=0, Total=6972 [2021-06-04 21:51:57,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7601 states. [2021-06-04 21:51:57,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7601 to 5978. [2021-06-04 21:51:57,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:57,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:57,949 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:57,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:57,949 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:57,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:57,949 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:57,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:57,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:57,954 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:51:58,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-06-04 21:51:58,155 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:58,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:58,155 INFO L82 PathProgramCache]: Analyzing trace with hash 129825016, now seen corresponding path program 445 times [2021-06-04 21:51:58,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:58,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524993314] [2021-06-04 21:51:58,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:58,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:58,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524993314] [2021-06-04 21:51:58,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524993314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:58,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961344725] [2021-06-04 21:51:58,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:58,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:58,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:58,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:58,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961344725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:58,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:58,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-04 21:51:58,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473867927] [2021-06-04 21:51:58,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:51:58,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:58,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:51:58,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:51:58,818 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:59,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:59,895 INFO L93 Difference]: Finished difference Result 7821 states and 20697 transitions. [2021-06-04 21:51:59,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-04 21:51:59,895 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:51:59,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:59,902 INFO L225 Difference]: With dead ends: 7821 [2021-06-04 21:51:59,903 INFO L226 Difference]: Without dead ends: 7551 [2021-06-04 21:51:59,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 1119.5ms TimeCoverageRelationStatistics Valid=1587, Invalid=5055, Unknown=0, NotChecked=0, Total=6642 [2021-06-04 21:51:59,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7551 states. [2021-06-04 21:51:59,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7551 to 5978. [2021-06-04 21:51:59,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:59,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:59,970 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:59,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:59,971 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:59,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:59,971 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:59,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:59,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:59,976 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:52:00,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable453,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:00,176 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:00,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:00,176 INFO L82 PathProgramCache]: Analyzing trace with hash -250618936, now seen corresponding path program 446 times [2021-06-04 21:52:00,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:00,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637831992] [2021-06-04 21:52:00,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:00,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:00,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:00,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637831992] [2021-06-04 21:52:00,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637831992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:00,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903151915] [2021-06-04 21:52:00,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:00,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:52:00,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:00,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:52:00,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:00,842 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:00,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903151915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:00,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:00,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:52:00,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835828068] [2021-06-04 21:52:00,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:52:00,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:00,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:52:00,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:52:00,843 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:02,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:02,117 INFO L93 Difference]: Finished difference Result 7771 states and 20597 transitions. [2021-06-04 21:52:02,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-04 21:52:02,117 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:52:02,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:02,126 INFO L225 Difference]: With dead ends: 7771 [2021-06-04 21:52:02,126 INFO L226 Difference]: Without dead ends: 7501 [2021-06-04 21:52:02,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 1317.9ms TimeCoverageRelationStatistics Valid=1730, Invalid=5580, Unknown=0, NotChecked=0, Total=7310 [2021-06-04 21:52:02,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7501 states. [2021-06-04 21:52:02,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7501 to 5978. [2021-06-04 21:52:02,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:02,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:52:02,216 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:52:02,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:02,216 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:52:02,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:02,216 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:52:02,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:52:02,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:02,221 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:52:02,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable454,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:02,422 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:02,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:02,422 INFO L82 PathProgramCache]: Analyzing trace with hash 373756214, now seen corresponding path program 447 times [2021-06-04 21:52:02,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:02,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716599576] [2021-06-04 21:52:02,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:02,773 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:02,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:02,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716599576] [2021-06-04 21:52:02,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716599576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:02,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980242268] [2021-06-04 21:52:02,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:02,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-04 21:52:02,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:02,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:52:02,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:03,078 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:03,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980242268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:03,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:03,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-04 21:52:03,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293335523] [2021-06-04 21:52:03,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:52:03,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:03,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:52:03,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:52:03,079 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:04,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:04,220 INFO L93 Difference]: Finished difference Result 7721 states and 20497 transitions. [2021-06-04 21:52:04,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-04 21:52:04,221 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:52:04,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:04,229 INFO L225 Difference]: With dead ends: 7721 [2021-06-04 21:52:04,229 INFO L226 Difference]: Without dead ends: 7451 [2021-06-04 21:52:04,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 1163.1ms TimeCoverageRelationStatistics Valid=1694, Invalid=5278, Unknown=0, NotChecked=0, Total=6972 [2021-06-04 21:52:04,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7451 states. [2021-06-04 21:52:04,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7451 to 5978. [2021-06-04 21:52:04,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:04,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:52:04,302 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:52:04,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:04,302 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:52:04,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:04,303 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:52:04,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:52:04,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:04,308 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:52:04,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-06-04 21:52:04,508 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:04,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:04,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1182808070, now seen corresponding path program 448 times [2021-06-04 21:52:04,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:04,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215678954] [2021-06-04 21:52:04,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:04,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:04,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215678954] [2021-06-04 21:52:04,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215678954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:04,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123590081] [2021-06-04 21:52:04,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:04,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:52:04,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:04,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:52:04,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:05,206 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:05,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123590081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:05,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:05,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:52:05,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800761679] [2021-06-04 21:52:05,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:52:05,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:05,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:52:05,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1081, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:52:05,207 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:06,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:06,678 INFO L93 Difference]: Finished difference Result 7671 states and 20397 transitions. [2021-06-04 21:52:06,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-04 21:52:06,679 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:52:06,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:06,688 INFO L225 Difference]: With dead ends: 7671 [2021-06-04 21:52:06,688 INFO L226 Difference]: Without dead ends: 7401 [2021-06-04 21:52:06,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 1407.8ms TimeCoverageRelationStatistics Valid=1845, Invalid=5811, Unknown=0, NotChecked=0, Total=7656 [2021-06-04 21:52:06,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7401 states. [2021-06-04 21:52:06,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7401 to 5978. [2021-06-04 21:52:06,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:06,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:52:06,770 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:52:06,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:06,771 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:52:06,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:06,771 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:52:06,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:52:06,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:06,777 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:52:06,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-06-04 21:52:06,978 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:06,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:06,978 INFO L82 PathProgramCache]: Analyzing trace with hash -209142028, now seen corresponding path program 449 times [2021-06-04 21:52:06,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:06,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641072393] [2021-06-04 21:52:06,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:07,345 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:07,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:07,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641072393] [2021-06-04 21:52:07,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641072393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:07,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123555378] [2021-06-04 21:52:07,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:07,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-04 21:52:07,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:07,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:52:07,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:07,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123555378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:07,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:07,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-04 21:52:07,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053001791] [2021-06-04 21:52:07,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:52:07,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:07,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:52:07,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:52:07,638 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:08,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:08,885 INFO L93 Difference]: Finished difference Result 7621 states and 20297 transitions. [2021-06-04 21:52:08,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-04 21:52:08,885 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:52:08,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:08,893 INFO L225 Difference]: With dead ends: 7621 [2021-06-04 21:52:08,893 INFO L226 Difference]: Without dead ends: 7351 [2021-06-04 21:52:08,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1800 ImplicationChecksByTransitivity, 1229.6ms TimeCoverageRelationStatistics Valid=1817, Invalid=5493, Unknown=0, NotChecked=0, Total=7310 [2021-06-04 21:52:08,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7351 states. [2021-06-04 21:52:08,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7351 to 5978. [2021-06-04 21:52:08,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:08,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:52:08,963 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:52:08,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:08,963 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:52:08,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:08,963 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:52:08,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:52:08,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:08,968 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:52:09,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:09,168 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:09,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:09,169 INFO L82 PathProgramCache]: Analyzing trace with hash -454219324, now seen corresponding path program 450 times [2021-06-04 21:52:09,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:09,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815392647] [2021-06-04 21:52:09,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:09,520 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:09,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:09,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815392647] [2021-06-04 21:52:09,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815392647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:09,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416584949] [2021-06-04 21:52:09,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:09,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-04 21:52:09,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:09,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:52:09,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:09,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416584949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:09,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:09,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:52:09,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591323467] [2021-06-04 21:52:09,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:52:09,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:09,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:52:09,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:52:09,837 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:11,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:11,307 INFO L93 Difference]: Finished difference Result 7571 states and 20197 transitions. [2021-06-04 21:52:11,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-04 21:52:11,307 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:52:11,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:11,314 INFO L225 Difference]: With dead ends: 7571 [2021-06-04 21:52:11,314 INFO L226 Difference]: Without dead ends: 7301 [2021-06-04 21:52:11,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1972 ImplicationChecksByTransitivity, 1433.1ms TimeCoverageRelationStatistics Valid=1976, Invalid=6034, Unknown=0, NotChecked=0, Total=8010 [2021-06-04 21:52:11,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7301 states. [2021-06-04 21:52:11,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7301 to 5978. [2021-06-04 21:52:11,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:11,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:52:11,382 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:52:11,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:11,382 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:52:11,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:11,382 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:52:11,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:52:11,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:11,387 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:52:11,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-06-04 21:52:11,588 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:11,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:11,588 INFO L82 PathProgramCache]: Analyzing trace with hash -831069646, now seen corresponding path program 451 times [2021-06-04 21:52:11,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:11,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437704742] [2021-06-04 21:52:11,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:11,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:11,932 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:11,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:11,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437704742] [2021-06-04 21:52:11,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437704742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:11,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636348570] [2021-06-04 21:52:11,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:11,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:12,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:52:12,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:12,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636348570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:12,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:12,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-04 21:52:12,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062590425] [2021-06-04 21:52:12,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:52:12,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:12,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:52:12,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:52:12,218 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:13,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:13,539 INFO L93 Difference]: Finished difference Result 7521 states and 20097 transitions. [2021-06-04 21:52:13,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-04 21:52:13,539 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:52:13,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:13,546 INFO L225 Difference]: With dead ends: 7521 [2021-06-04 21:52:13,546 INFO L226 Difference]: Without dead ends: 7251 [2021-06-04 21:52:13,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1930 ImplicationChecksByTransitivity, 1247.0ms TimeCoverageRelationStatistics Valid=1956, Invalid=5700, Unknown=0, NotChecked=0, Total=7656 [2021-06-04 21:52:13,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7251 states. [2021-06-04 21:52:13,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7251 to 5978. [2021-06-04 21:52:13,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:13,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:52:13,612 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:52:13,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:13,613 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:52:13,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:13,613 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:52:13,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:52:13,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:13,618 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:52:13,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-06-04 21:52:13,818 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:13,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:13,819 INFO L82 PathProgramCache]: Analyzing trace with hash 495685890, now seen corresponding path program 452 times [2021-06-04 21:52:13,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:13,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796525673] [2021-06-04 21:52:13,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:14,170 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:14,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:14,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796525673] [2021-06-04 21:52:14,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796525673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:14,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349232885] [2021-06-04 21:52:14,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:14,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:52:14,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:14,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:52:14,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:14,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349232885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:14,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:14,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:52:14,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037010035] [2021-06-04 21:52:14,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:52:14,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:14,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:52:14,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1063, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:52:14,466 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:15,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:15,979 INFO L93 Difference]: Finished difference Result 7471 states and 19997 transitions. [2021-06-04 21:52:15,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-04 21:52:15,979 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:52:15,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:15,987 INFO L225 Difference]: With dead ends: 7471 [2021-06-04 21:52:15,987 INFO L226 Difference]: Without dead ends: 7201 [2021-06-04 21:52:15,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2109 ImplicationChecksByTransitivity, 1475.5ms TimeCoverageRelationStatistics Valid=2123, Invalid=6249, Unknown=0, NotChecked=0, Total=8372 [2021-06-04 21:52:15,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7201 states. [2021-06-04 21:52:16,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7201 to 5978. [2021-06-04 21:52:16,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:16,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:52:16,093 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:52:16,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:16,093 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:52:16,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:16,093 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:52:16,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:52:16,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:16,098 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:52:16,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:16,299 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:16,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:16,299 INFO L82 PathProgramCache]: Analyzing trace with hash 949902064, now seen corresponding path program 453 times [2021-06-04 21:52:16,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:16,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936420175] [2021-06-04 21:52:16,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:16,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:16,712 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:16,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:16,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936420175] [2021-06-04 21:52:16,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936420175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:16,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130380979] [2021-06-04 21:52:16,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:16,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-04 21:52:16,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:16,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:52:16,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:17,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130380979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:17,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:17,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-04 21:52:17,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559259037] [2021-06-04 21:52:17,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:52:17,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:17,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:52:17,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:52:17,004 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:18,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:18,273 INFO L93 Difference]: Finished difference Result 7421 states and 19897 transitions. [2021-06-04 21:52:18,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-04 21:52:18,273 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:52:18,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:18,281 INFO L225 Difference]: With dead ends: 7421 [2021-06-04 21:52:18,281 INFO L226 Difference]: Without dead ends: 7151 [2021-06-04 21:52:18,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2064 ImplicationChecksByTransitivity, 1312.7ms TimeCoverageRelationStatistics Valid=2111, Invalid=5899, Unknown=0, NotChecked=0, Total=8010 [2021-06-04 21:52:18,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2021-06-04 21:52:18,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 5978. [2021-06-04 21:52:18,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:18,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:52:18,349 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:52:18,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:18,349 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:52:18,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:18,349 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:52:18,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:52:18,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:18,354 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:52:18,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable461 [2021-06-04 21:52:18,555 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:18,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:18,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1948798400, now seen corresponding path program 454 times [2021-06-04 21:52:18,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:18,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185263290] [2021-06-04 21:52:18,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:18,905 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:18,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:18,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185263290] [2021-06-04 21:52:18,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185263290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:18,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953233683] [2021-06-04 21:52:18,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:19,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:52:19,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:19,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:52:19,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:19,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953233683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:19,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:19,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:52:19,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765747881] [2021-06-04 21:52:19,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:52:19,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:19,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:52:19,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:52:19,229 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:20,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:20,812 INFO L93 Difference]: Finished difference Result 7371 states and 19797 transitions. [2021-06-04 21:52:20,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-04 21:52:20,812 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:52:20,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:20,820 INFO L225 Difference]: With dead ends: 7371 [2021-06-04 21:52:20,820 INFO L226 Difference]: Without dead ends: 7101 [2021-06-04 21:52:20,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 1539.4ms TimeCoverageRelationStatistics Valid=2286, Invalid=6456, Unknown=0, NotChecked=0, Total=8742 [2021-06-04 21:52:20,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7101 states. [2021-06-04 21:52:20,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7101 to 5978. [2021-06-04 21:52:20,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:20,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:52:20,889 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:52:20,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:20,889 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:52:20,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:20,890 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:52:20,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:52:20,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:20,894 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:52:21,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:21,095 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:21,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:21,095 INFO L82 PathProgramCache]: Analyzing trace with hash 69470510, now seen corresponding path program 455 times [2021-06-04 21:52:21,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:21,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728446239] [2021-06-04 21:52:21,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:21,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:21,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:21,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728446239] [2021-06-04 21:52:21,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728446239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:21,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991567262] [2021-06-04 21:52:21,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:21,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-04 21:52:21,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:21,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:52:21,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:21,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991567262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:21,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:21,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-04 21:52:21,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289947828] [2021-06-04 21:52:21,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:52:21,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:21,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:52:21,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:52:21,760 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:23,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:23,089 INFO L93 Difference]: Finished difference Result 7321 states and 19697 transitions. [2021-06-04 21:52:23,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-04 21:52:23,089 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:52:23,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:23,097 INFO L225 Difference]: With dead ends: 7321 [2021-06-04 21:52:23,097 INFO L226 Difference]: Without dead ends: 7051 [2021-06-04 21:52:23,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2202 ImplicationChecksByTransitivity, 1309.5ms TimeCoverageRelationStatistics Valid=2282, Invalid=6090, Unknown=0, NotChecked=0, Total=8372 [2021-06-04 21:52:23,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7051 states. [2021-06-04 21:52:23,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7051 to 5978. [2021-06-04 21:52:23,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:23,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:52:23,171 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:52:23,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:23,172 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:52:23,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:23,172 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:52:23,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:52:23,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:23,177 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:52:23,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:23,377 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:23,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:23,378 INFO L82 PathProgramCache]: Analyzing trace with hash 2099789822, now seen corresponding path program 456 times [2021-06-04 21:52:23,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:23,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195594666] [2021-06-04 21:52:23,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:23,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:23,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195594666] [2021-06-04 21:52:23,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195594666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:23,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147326646] [2021-06-04 21:52:23,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:23,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-04 21:52:23,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:23,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:52:23,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:24,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147326646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:24,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:24,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:52:24,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067322394] [2021-06-04 21:52:24,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:52:24,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:24,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:52:24,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1029, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:52:24,043 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:25,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:25,680 INFO L93 Difference]: Finished difference Result 7271 states and 19597 transitions. [2021-06-04 21:52:25,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-04 21:52:25,680 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:52:25,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:25,688 INFO L225 Difference]: With dead ends: 7271 [2021-06-04 21:52:25,688 INFO L226 Difference]: Without dead ends: 7001 [2021-06-04 21:52:25,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2395 ImplicationChecksByTransitivity, 1609.8ms TimeCoverageRelationStatistics Valid=2465, Invalid=6655, Unknown=0, NotChecked=0, Total=9120 [2021-06-04 21:52:25,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7001 states. [2021-06-04 21:52:25,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7001 to 5978. [2021-06-04 21:52:25,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:25,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:52:25,757 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:52:25,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:25,758 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:52:25,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:25,758 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:52:25,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:52:25,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:25,763 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:52:25,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable464,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:25,963 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:25,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:25,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1580938004, now seen corresponding path program 457 times [2021-06-04 21:52:25,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:25,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80549453] [2021-06-04 21:52:25,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:26,311 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:26,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:26,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80549453] [2021-06-04 21:52:26,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80549453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:26,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159039080] [2021-06-04 21:52:26,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:26,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:52:26,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:26,587 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:26,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159039080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:26,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:26,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-04 21:52:26,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587122833] [2021-06-04 21:52:26,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:52:26,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:26,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:52:26,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:52:26,588 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:27,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:27,991 INFO L93 Difference]: Finished difference Result 7221 states and 19497 transitions. [2021-06-04 21:52:27,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-04 21:52:27,992 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:52:27,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:27,998 INFO L225 Difference]: With dead ends: 7221 [2021-06-04 21:52:27,999 INFO L226 Difference]: Without dead ends: 6951 [2021-06-04 21:52:27,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 1365.2ms TimeCoverageRelationStatistics Valid=2469, Invalid=6273, Unknown=0, NotChecked=0, Total=8742 [2021-06-04 21:52:28,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6951 states. [2021-06-04 21:52:28,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6951 to 5978. [2021-06-04 21:52:28,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:28,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:52:28,065 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:52:28,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:28,065 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:52:28,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:28,065 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:52:28,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:52:28,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:28,070 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:52:28,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-06-04 21:52:28,270 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:28,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:28,271 INFO L82 PathProgramCache]: Analyzing trace with hash 998787004, now seen corresponding path program 458 times [2021-06-04 21:52:28,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:28,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136515873] [2021-06-04 21:52:28,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:28,627 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:28,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:28,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136515873] [2021-06-04 21:52:28,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136515873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:28,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607625790] [2021-06-04 21:52:28,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:28,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:52:28,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:28,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:52:28,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:28,917 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:28,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607625790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:28,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:28,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:52:28,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987536011] [2021-06-04 21:52:28,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:52:28,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:28,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:52:28,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1006, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:52:28,919 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:30,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:30,659 INFO L93 Difference]: Finished difference Result 7231 states and 19547 transitions. [2021-06-04 21:52:30,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-04 21:52:30,659 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:52:30,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:30,665 INFO L225 Difference]: With dead ends: 7231 [2021-06-04 21:52:30,665 INFO L226 Difference]: Without dead ends: 6961 [2021-06-04 21:52:30,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 1674.5ms TimeCoverageRelationStatistics Valid=2660, Invalid=6846, Unknown=0, NotChecked=0, Total=9506 [2021-06-04 21:52:30,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6961 states. [2021-06-04 21:52:30,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6961 to 5978. [2021-06-04 21:52:30,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.82549774134181) internal successors, (16888), 5977 states have internal predecessors, (16888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:30,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16888 transitions. [2021-06-04 21:52:30,730 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16888 transitions. Word has length 180 [2021-06-04 21:52:30,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:30,730 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16888 transitions. [2021-06-04 21:52:30,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:30,730 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16888 transitions. [2021-06-04 21:52:30,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:52:30,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:30,735 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:52:30,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-04 21:52:30,936 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:30,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:30,936 INFO L82 PathProgramCache]: Analyzing trace with hash -33860598, now seen corresponding path program 459 times [2021-06-04 21:52:30,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:30,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935992653] [2021-06-04 21:52:30,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:30,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:31,287 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:31,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:31,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935992653] [2021-06-04 21:52:31,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935992653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:31,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246044470] [2021-06-04 21:52:31,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:31,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-04 21:52:31,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:31,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:52:31,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:31,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246044470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:31,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:31,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-04 21:52:31,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141994512] [2021-06-04 21:52:31,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:52:31,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:31,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:52:31,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:52:31,575 INFO L87 Difference]: Start difference. First operand 5978 states and 16888 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:33,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:33,010 INFO L93 Difference]: Finished difference Result 7998 states and 21721 transitions. [2021-06-04 21:52:33,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-04 21:52:33,010 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:52:33,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:33,044 INFO L225 Difference]: With dead ends: 7998 [2021-06-04 21:52:33,044 INFO L226 Difference]: Without dead ends: 7728 [2021-06-04 21:52:33,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2489 ImplicationChecksByTransitivity, 1381.5ms TimeCoverageRelationStatistics Valid=2673, Invalid=6447, Unknown=0, NotChecked=0, Total=9120 [2021-06-04 21:52:33,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7728 states. [2021-06-04 21:52:33,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7728 to 6158. [2021-06-04 21:52:33,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6158 states, 6157 states have (on average 2.833685236316388) internal successors, (17447), 6157 states have internal predecessors, (17447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:33,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6158 states to 6158 states and 17447 transitions. [2021-06-04 21:52:33,112 INFO L78 Accepts]: Start accepts. Automaton has 6158 states and 17447 transitions. Word has length 180 [2021-06-04 21:52:33,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:33,112 INFO L482 AbstractCegarLoop]: Abstraction has 6158 states and 17447 transitions. [2021-06-04 21:52:33,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:33,113 INFO L276 IsEmpty]: Start isEmpty. Operand 6158 states and 17447 transitions. [2021-06-04 21:52:33,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:52:33,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:33,117 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:52:33,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:33,318 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:33,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:33,318 INFO L82 PathProgramCache]: Analyzing trace with hash -11517348, now seen corresponding path program 460 times [2021-06-04 21:52:33,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:33,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963693456] [2021-06-04 21:52:33,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:33,671 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:33,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:33,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963693456] [2021-06-04 21:52:33,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963693456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:33,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384180995] [2021-06-04 21:52:33,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:33,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:52:33,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:33,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:52:33,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:33,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384180995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:33,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:33,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-04 21:52:33,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910935462] [2021-06-04 21:52:33,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:52:33,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:33,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:52:33,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1048, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:52:33,978 INFO L87 Difference]: Start difference. First operand 6158 states and 17447 transitions. Second operand has 37 states, 37 states have (on average 4.945945945945946) internal successors, (183), 37 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:35,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:35,855 INFO L93 Difference]: Finished difference Result 7821 states and 21221 transitions. [2021-06-04 21:52:35,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-04 21:52:35,856 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.945945945945946) internal successors, (183), 37 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-04 21:52:35,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:35,864 INFO L225 Difference]: With dead ends: 7821 [2021-06-04 21:52:35,864 INFO L226 Difference]: Without dead ends: 7246 [2021-06-04 21:52:35,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2954 ImplicationChecksByTransitivity, 1809.2ms TimeCoverageRelationStatistics Valid=2964, Invalid=7748, Unknown=0, NotChecked=0, Total=10712 [2021-06-04 21:52:35,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7246 states. [2021-06-04 21:52:35,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7246 to 4003. [2021-06-04 21:52:35,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.7406296851574212) internal successors, (10968), 4002 states have internal predecessors, (10968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:35,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 10968 transitions. [2021-06-04 21:52:35,943 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 10968 transitions. Word has length 180 [2021-06-04 21:52:35,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:35,943 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 10968 transitions. [2021-06-04 21:52:35,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.945945945945946) internal successors, (183), 37 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:35,943 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 10968 transitions. [2021-06-04 21:52:35,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:35,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:35,946 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:52:36,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-06-04 21:52:36,147 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:36,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:36,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1598313859, now seen corresponding path program 461 times [2021-06-04 21:52:36,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:36,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498361830] [2021-06-04 21:52:36,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:36,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:36,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:36,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498361830] [2021-06-04 21:52:36,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498361830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:36,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522854369] [2021-06-04 21:52:36,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:36,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-04 21:52:36,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:36,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:36,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:36,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522854369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:36,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:36,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:52:36,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729951766] [2021-06-04 21:52:36,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:52:36,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:36,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:52:36,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=979, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:52:36,901 INFO L87 Difference]: Start difference. First operand 4003 states and 10968 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:37,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:37,823 INFO L93 Difference]: Finished difference Result 5921 states and 15007 transitions. [2021-06-04 21:52:37,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:52:37,823 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:52:37,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:37,830 INFO L225 Difference]: With dead ends: 5921 [2021-06-04 21:52:37,830 INFO L226 Difference]: Without dead ends: 5651 [2021-06-04 21:52:37,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1061.9ms TimeCoverageRelationStatistics Valid=1382, Invalid=3730, Unknown=0, NotChecked=0, Total=5112 [2021-06-04 21:52:37,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5651 states. [2021-06-04 21:52:37,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5651 to 4078. [2021-06-04 21:52:37,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4078 states, 4077 states have (on average 2.745401030169242) internal successors, (11193), 4077 states have internal predecessors, (11193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:37,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4078 states to 4078 states and 11193 transitions. [2021-06-04 21:52:37,897 INFO L78 Accepts]: Start accepts. Automaton has 4078 states and 11193 transitions. Word has length 185 [2021-06-04 21:52:37,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:37,897 INFO L482 AbstractCegarLoop]: Abstraction has 4078 states and 11193 transitions. [2021-06-04 21:52:37,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:37,898 INFO L276 IsEmpty]: Start isEmpty. Operand 4078 states and 11193 transitions. [2021-06-04 21:52:37,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:37,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:37,902 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:52:38,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 465 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-06-04 21:52:38,105 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:38,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:38,105 INFO L82 PathProgramCache]: Analyzing trace with hash 450321491, now seen corresponding path program 462 times [2021-06-04 21:52:38,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:38,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566952859] [2021-06-04 21:52:38,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:38,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:38,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:38,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566952859] [2021-06-04 21:52:38,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566952859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:38,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462723320] [2021-06-04 21:52:38,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:38,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-04 21:52:38,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:38,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:38,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:38,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462723320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:38,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:38,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:52:38,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949016412] [2021-06-04 21:52:38,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:52:38,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:38,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:52:38,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:52:38,919 INFO L87 Difference]: Start difference. First operand 4078 states and 11193 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:39,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:39,851 INFO L93 Difference]: Finished difference Result 6691 states and 16622 transitions. [2021-06-04 21:52:39,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:52:39,852 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:52:39,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:39,858 INFO L225 Difference]: With dead ends: 6691 [2021-06-04 21:52:39,858 INFO L226 Difference]: Without dead ends: 6421 [2021-06-04 21:52:39,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 1049.2ms TimeCoverageRelationStatistics Valid=1453, Invalid=4097, Unknown=0, NotChecked=0, Total=5550 [2021-06-04 21:52:39,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6421 states. [2021-06-04 21:52:39,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6421 to 4153. [2021-06-04 21:52:39,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4153 states, 4152 states have (on average 2.75) internal successors, (11418), 4152 states have internal predecessors, (11418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:39,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4153 states to 4153 states and 11418 transitions. [2021-06-04 21:52:39,909 INFO L78 Accepts]: Start accepts. Automaton has 4153 states and 11418 transitions. Word has length 185 [2021-06-04 21:52:39,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:39,909 INFO L482 AbstractCegarLoop]: Abstraction has 4153 states and 11418 transitions. [2021-06-04 21:52:39,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:39,909 INFO L276 IsEmpty]: Start isEmpty. Operand 4153 states and 11418 transitions. [2021-06-04 21:52:39,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:39,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:39,913 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:52:40,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,466 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:40,113 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:40,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:40,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1414408383, now seen corresponding path program 463 times [2021-06-04 21:52:40,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:40,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025726355] [2021-06-04 21:52:40,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:40,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:40,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:40,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:40,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025726355] [2021-06-04 21:52:40,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025726355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:40,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441565929] [2021-06-04 21:52:40,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:40,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:40,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:40,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441565929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:40,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:40,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:52:40,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971043063] [2021-06-04 21:52:40,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:52:40,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:40,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:52:40,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:52:40,836 INFO L87 Difference]: Start difference. First operand 4153 states and 11418 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:41,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:41,700 INFO L93 Difference]: Finished difference Result 6721 states and 16757 transitions. [2021-06-04 21:52:41,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:52:41,700 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:52:41,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:41,706 INFO L225 Difference]: With dead ends: 6721 [2021-06-04 21:52:41,706 INFO L226 Difference]: Without dead ends: 6451 [2021-06-04 21:52:41,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1001.1ms TimeCoverageRelationStatistics Valid=1441, Invalid=4109, Unknown=0, NotChecked=0, Total=5550 [2021-06-04 21:52:41,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6451 states. [2021-06-04 21:52:41,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6451 to 4228. [2021-06-04 21:52:41,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.7544357700496804) internal successors, (11643), 4227 states have internal predecessors, (11643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:41,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11643 transitions. [2021-06-04 21:52:41,753 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11643 transitions. Word has length 185 [2021-06-04 21:52:41,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:41,753 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11643 transitions. [2021-06-04 21:52:41,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:41,753 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11643 transitions. [2021-06-04 21:52:41,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:41,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:41,757 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:52:41,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:41,957 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:41,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:41,958 INFO L82 PathProgramCache]: Analyzing trace with hash -716692975, now seen corresponding path program 464 times [2021-06-04 21:52:41,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:41,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326897553] [2021-06-04 21:52:41,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:42,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:42,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:42,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326897553] [2021-06-04 21:52:42,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326897553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:42,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956865630] [2021-06-04 21:52:42,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:42,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:52:42,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:42,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:42,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:42,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956865630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:42,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:42,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:52:42,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327404935] [2021-06-04 21:52:42,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:52:42,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:42,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:52:42,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:52:42,734 INFO L87 Difference]: Start difference. First operand 4228 states and 11643 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:43,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:43,749 INFO L93 Difference]: Finished difference Result 6746 states and 16882 transitions. [2021-06-04 21:52:43,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:52:43,749 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:52:43,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:43,756 INFO L225 Difference]: With dead ends: 6746 [2021-06-04 21:52:43,756 INFO L226 Difference]: Without dead ends: 6476 [2021-06-04 21:52:43,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1101.0ms TimeCoverageRelationStatistics Valid=1463, Invalid=4389, Unknown=0, NotChecked=0, Total=5852 [2021-06-04 21:52:43,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6476 states. [2021-06-04 21:52:43,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6476 to 4303. [2021-06-04 21:52:43,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4303 states, 4302 states have (on average 2.758716875871688) internal successors, (11868), 4302 states have internal predecessors, (11868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:43,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4303 states to 4303 states and 11868 transitions. [2021-06-04 21:52:43,809 INFO L78 Accepts]: Start accepts. Automaton has 4303 states and 11868 transitions. Word has length 185 [2021-06-04 21:52:43,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:43,809 INFO L482 AbstractCegarLoop]: Abstraction has 4303 states and 11868 transitions. [2021-06-04 21:52:43,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:43,810 INFO L276 IsEmpty]: Start isEmpty. Operand 4303 states and 11868 transitions. [2021-06-04 21:52:43,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:43,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:43,813 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:52:44,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:44,013 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:44,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:44,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1858391679, now seen corresponding path program 465 times [2021-06-04 21:52:44,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:44,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848458310] [2021-06-04 21:52:44,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:44,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:44,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:44,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848458310] [2021-06-04 21:52:44,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848458310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:44,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147673252] [2021-06-04 21:52:44,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:44,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-04 21:52:44,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:44,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:44,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:44,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147673252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:44,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:44,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:52:44,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930418947] [2021-06-04 21:52:44,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:52:44,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:44,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:52:44,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:52:44,764 INFO L87 Difference]: Start difference. First operand 4303 states and 11868 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:45,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:45,696 INFO L93 Difference]: Finished difference Result 6771 states and 17007 transitions. [2021-06-04 21:52:45,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:52:45,697 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:52:45,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:45,703 INFO L225 Difference]: With dead ends: 6771 [2021-06-04 21:52:45,703 INFO L226 Difference]: Without dead ends: 6501 [2021-06-04 21:52:45,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 1042.8ms TimeCoverageRelationStatistics Valid=1465, Invalid=4387, Unknown=0, NotChecked=0, Total=5852 [2021-06-04 21:52:45,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6501 states. [2021-06-04 21:52:45,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6501 to 4378. [2021-06-04 21:52:45,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4378 states, 4377 states have (on average 2.7628512679917754) internal successors, (12093), 4377 states have internal predecessors, (12093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:45,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4378 states to 4378 states and 12093 transitions. [2021-06-04 21:52:45,759 INFO L78 Accepts]: Start accepts. Automaton has 4378 states and 12093 transitions. Word has length 185 [2021-06-04 21:52:45,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:45,759 INFO L482 AbstractCegarLoop]: Abstraction has 4378 states and 12093 transitions. [2021-06-04 21:52:45,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:45,759 INFO L276 IsEmpty]: Start isEmpty. Operand 4378 states and 12093 transitions. [2021-06-04 21:52:45,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:45,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:45,763 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:52:45,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:45,963 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:45,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:45,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1357077839, now seen corresponding path program 466 times [2021-06-04 21:52:45,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:45,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719132643] [2021-06-04 21:52:45,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:45,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:46,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:46,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:46,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719132643] [2021-06-04 21:52:46,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719132643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:46,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778278792] [2021-06-04 21:52:46,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:46,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:52:46,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:46,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:46,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:46,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:46,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778278792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:46,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:46,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:52:46,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118293010] [2021-06-04 21:52:46,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:52:46,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:46,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:52:46,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:52:46,709 INFO L87 Difference]: Start difference. First operand 4378 states and 12093 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:47,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:47,724 INFO L93 Difference]: Finished difference Result 6796 states and 17132 transitions. [2021-06-04 21:52:47,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-04 21:52:47,724 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:52:47,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:47,731 INFO L225 Difference]: With dead ends: 6796 [2021-06-04 21:52:47,731 INFO L226 Difference]: Without dead ends: 6526 [2021-06-04 21:52:47,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 1148.7ms TimeCoverageRelationStatistics Valid=1489, Invalid=4673, Unknown=0, NotChecked=0, Total=6162 [2021-06-04 21:52:47,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6526 states. [2021-06-04 21:52:47,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6526 to 4453. [2021-06-04 21:52:47,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4453 states, 4452 states have (on average 2.766846361185984) internal successors, (12318), 4452 states have internal predecessors, (12318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:47,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4453 states to 4453 states and 12318 transitions. [2021-06-04 21:52:47,788 INFO L78 Accepts]: Start accepts. Automaton has 4453 states and 12318 transitions. Word has length 185 [2021-06-04 21:52:47,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:47,788 INFO L482 AbstractCegarLoop]: Abstraction has 4453 states and 12318 transitions. [2021-06-04 21:52:47,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:47,788 INFO L276 IsEmpty]: Start isEmpty. Operand 4453 states and 12318 transitions. [2021-06-04 21:52:47,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:47,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:47,792 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:52:47,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-06-04 21:52:47,992 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:47,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:47,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1833573181, now seen corresponding path program 467 times [2021-06-04 21:52:47,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:47,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933071561] [2021-06-04 21:52:47,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:48,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:48,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:48,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933071561] [2021-06-04 21:52:48,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933071561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:48,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724294855] [2021-06-04 21:52:48,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:48,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-04 21:52:48,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:48,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:48,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:48,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724294855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:48,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:48,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:52:48,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227462199] [2021-06-04 21:52:48,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:52:48,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:48,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:52:48,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:52:48,695 INFO L87 Difference]: Start difference. First operand 4453 states and 12318 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:49,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:49,726 INFO L93 Difference]: Finished difference Result 6821 states and 17257 transitions. [2021-06-04 21:52:49,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-04 21:52:49,726 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:52:49,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:49,733 INFO L225 Difference]: With dead ends: 6821 [2021-06-04 21:52:49,733 INFO L226 Difference]: Without dead ends: 6551 [2021-06-04 21:52:49,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 1057.2ms TimeCoverageRelationStatistics Valid=1505, Invalid=4657, Unknown=0, NotChecked=0, Total=6162 [2021-06-04 21:52:49,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6551 states. [2021-06-04 21:52:49,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6551 to 4528. [2021-06-04 21:52:49,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4528 states, 4527 states have (on average 2.7707090788601723) internal successors, (12543), 4527 states have internal predecessors, (12543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:49,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4528 states to 4528 states and 12543 transitions. [2021-06-04 21:52:49,804 INFO L78 Accepts]: Start accepts. Automaton has 4528 states and 12543 transitions. Word has length 185 [2021-06-04 21:52:49,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:49,804 INFO L482 AbstractCegarLoop]: Abstraction has 4528 states and 12543 transitions. [2021-06-04 21:52:49,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:49,805 INFO L276 IsEmpty]: Start isEmpty. Operand 4528 states and 12543 transitions. [2021-06-04 21:52:49,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:49,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:49,808 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:52:50,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-06-04 21:52:50,009 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:50,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:50,009 INFO L82 PathProgramCache]: Analyzing trace with hash -994710003, now seen corresponding path program 468 times [2021-06-04 21:52:50,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:50,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482985035] [2021-06-04 21:52:50,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:50,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:50,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:50,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:50,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482985035] [2021-06-04 21:52:50,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482985035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:50,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977528263] [2021-06-04 21:52:50,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:50,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-04 21:52:50,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:50,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:50,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:50,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977528263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:50,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:50,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:52:50,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136118769] [2021-06-04 21:52:50,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:52:50,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:50,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:52:50,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1122, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:52:50,757 INFO L87 Difference]: Start difference. First operand 4528 states and 12543 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:51,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:51,934 INFO L93 Difference]: Finished difference Result 6846 states and 17382 transitions. [2021-06-04 21:52:51,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:52:51,935 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:52:51,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:51,942 INFO L225 Difference]: With dead ends: 6846 [2021-06-04 21:52:51,942 INFO L226 Difference]: Without dead ends: 6576 [2021-06-04 21:52:51,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 1197.0ms TimeCoverageRelationStatistics Valid=1531, Invalid=4949, Unknown=0, NotChecked=0, Total=6480 [2021-06-04 21:52:51,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6576 states. [2021-06-04 21:52:51,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6576 to 4603. [2021-06-04 21:52:51,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4603 states, 4602 states have (on average 2.7744458930899607) internal successors, (12768), 4602 states have internal predecessors, (12768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:52,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4603 states to 4603 states and 12768 transitions. [2021-06-04 21:52:52,001 INFO L78 Accepts]: Start accepts. Automaton has 4603 states and 12768 transitions. Word has length 185 [2021-06-04 21:52:52,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:52,001 INFO L482 AbstractCegarLoop]: Abstraction has 4603 states and 12768 transitions. [2021-06-04 21:52:52,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:52,001 INFO L276 IsEmpty]: Start isEmpty. Operand 4603 states and 12768 transitions. [2021-06-04 21:52:52,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:52,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:52,005 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:52:52,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 472 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-06-04 21:52:52,206 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:52,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:52,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1129931397, now seen corresponding path program 469 times [2021-06-04 21:52:52,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:52,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564045233] [2021-06-04 21:52:52,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:52,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:52,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564045233] [2021-06-04 21:52:52,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564045233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:52,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564542033] [2021-06-04 21:52:52,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:52,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:52,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:52,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564542033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:52,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:52,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:52:52,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454540103] [2021-06-04 21:52:52,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:52:52,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:52,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:52:52,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:52:52,920 INFO L87 Difference]: Start difference. First operand 4603 states and 12768 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:53,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:53,900 INFO L93 Difference]: Finished difference Result 6871 states and 17507 transitions. [2021-06-04 21:52:53,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-04 21:52:53,900 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:52:53,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:53,907 INFO L225 Difference]: With dead ends: 6871 [2021-06-04 21:52:53,907 INFO L226 Difference]: Without dead ends: 6601 [2021-06-04 21:52:53,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1505 ImplicationChecksByTransitivity, 1112.7ms TimeCoverageRelationStatistics Valid=1561, Invalid=4919, Unknown=0, NotChecked=0, Total=6480 [2021-06-04 21:52:53,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6601 states. [2021-06-04 21:52:53,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6601 to 4678. [2021-06-04 21:52:53,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4678 states, 4677 states have (on average 2.7780628608082103) internal successors, (12993), 4677 states have internal predecessors, (12993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:53,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4678 states to 4678 states and 12993 transitions. [2021-06-04 21:52:53,967 INFO L78 Accepts]: Start accepts. Automaton has 4678 states and 12993 transitions. Word has length 185 [2021-06-04 21:52:53,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:53,967 INFO L482 AbstractCegarLoop]: Abstraction has 4678 states and 12993 transitions. [2021-06-04 21:52:53,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:53,967 INFO L276 IsEmpty]: Start isEmpty. Operand 4678 states and 12993 transitions. [2021-06-04 21:52:53,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:53,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:53,971 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:52:54,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 473 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-04 21:52:54,172 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:54,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:54,172 INFO L82 PathProgramCache]: Analyzing trace with hash -2006666165, now seen corresponding path program 470 times [2021-06-04 21:52:54,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:54,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769208539] [2021-06-04 21:52:54,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:54,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:54,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:54,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769208539] [2021-06-04 21:52:54,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769208539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:54,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841561150] [2021-06-04 21:52:54,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:54,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:52:54,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:54,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:54,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:54,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841561150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:54,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:54,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:52:54,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707135826] [2021-06-04 21:52:54,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:52:54,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:54,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:52:54,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:52:54,921 INFO L87 Difference]: Start difference. First operand 4678 states and 12993 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:56,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:56,062 INFO L93 Difference]: Finished difference Result 6896 states and 17632 transitions. [2021-06-04 21:52:56,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-04 21:52:56,063 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:52:56,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:56,069 INFO L225 Difference]: With dead ends: 6896 [2021-06-04 21:52:56,069 INFO L226 Difference]: Without dead ends: 6626 [2021-06-04 21:52:56,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 1256.1ms TimeCoverageRelationStatistics Valid=1589, Invalid=5217, Unknown=0, NotChecked=0, Total=6806 [2021-06-04 21:52:56,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6626 states. [2021-06-04 21:52:56,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6626 to 4753. [2021-06-04 21:52:56,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4753 states, 4752 states have (on average 2.7815656565656566) internal successors, (13218), 4752 states have internal predecessors, (13218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:56,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4753 states to 4753 states and 13218 transitions. [2021-06-04 21:52:56,141 INFO L78 Accepts]: Start accepts. Automaton has 4753 states and 13218 transitions. Word has length 185 [2021-06-04 21:52:56,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:56,141 INFO L482 AbstractCegarLoop]: Abstraction has 4753 states and 13218 transitions. [2021-06-04 21:52:56,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:56,141 INFO L276 IsEmpty]: Start isEmpty. Operand 4753 states and 13218 transitions. [2021-06-04 21:52:56,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:56,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:56,145 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:52:56,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-04 21:52:56,346 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:56,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:56,346 INFO L82 PathProgramCache]: Analyzing trace with hash 550974777, now seen corresponding path program 471 times [2021-06-04 21:52:56,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:56,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005895473] [2021-06-04 21:52:56,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:56,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:56,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:56,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:56,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005895473] [2021-06-04 21:52:56,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005895473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:56,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457280201] [2021-06-04 21:52:56,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:56,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-04 21:52:56,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:56,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:56,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:57,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:57,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457280201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:57,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:57,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:52:57,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881283019] [2021-06-04 21:52:57,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:52:57,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:57,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:52:57,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:52:57,053 INFO L87 Difference]: Start difference. First operand 4753 states and 13218 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:58,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:58,094 INFO L93 Difference]: Finished difference Result 6921 states and 17757 transitions. [2021-06-04 21:52:58,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-04 21:52:58,094 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:52:58,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:58,101 INFO L225 Difference]: With dead ends: 6921 [2021-06-04 21:52:58,101 INFO L226 Difference]: Without dead ends: 6651 [2021-06-04 21:52:58,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1632 ImplicationChecksByTransitivity, 1139.3ms TimeCoverageRelationStatistics Valid=1633, Invalid=5173, Unknown=0, NotChecked=0, Total=6806 [2021-06-04 21:52:58,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6651 states. [2021-06-04 21:52:58,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6651 to 4828. [2021-06-04 21:52:58,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4828 states, 4827 states have (on average 2.7849596022374143) internal successors, (13443), 4827 states have internal predecessors, (13443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:58,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4828 states to 4828 states and 13443 transitions. [2021-06-04 21:52:58,178 INFO L78 Accepts]: Start accepts. Automaton has 4828 states and 13443 transitions. Word has length 185 [2021-06-04 21:52:58,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:58,178 INFO L482 AbstractCegarLoop]: Abstraction has 4828 states and 13443 transitions. [2021-06-04 21:52:58,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:58,178 INFO L276 IsEmpty]: Start isEmpty. Operand 4828 states and 13443 transitions. [2021-06-04 21:52:58,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:58,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:58,182 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:52:58,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:58,383 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:58,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:58,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1915523081, now seen corresponding path program 472 times [2021-06-04 21:52:58,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:58,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763158041] [2021-06-04 21:52:58,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:58,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:58,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:58,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:58,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763158041] [2021-06-04 21:52:58,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763158041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:58,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510547471] [2021-06-04 21:52:58,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:58,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:52:58,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:58,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:58,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:59,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510547471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:59,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:59,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:52:59,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043011729] [2021-06-04 21:52:59,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:52:59,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:59,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:52:59,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:52:59,144 INFO L87 Difference]: Start difference. First operand 4828 states and 13443 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:00,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:00,344 INFO L93 Difference]: Finished difference Result 6946 states and 17882 transitions. [2021-06-04 21:53:00,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-04 21:53:00,344 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:53:00,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:00,351 INFO L225 Difference]: With dead ends: 6946 [2021-06-04 21:53:00,351 INFO L226 Difference]: Without dead ends: 6676 [2021-06-04 21:53:00,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 1301.8ms TimeCoverageRelationStatistics Valid=1663, Invalid=5477, Unknown=0, NotChecked=0, Total=7140 [2021-06-04 21:53:00,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6676 states. [2021-06-04 21:53:00,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6676 to 4903. [2021-06-04 21:53:00,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4903 states, 4902 states have (on average 2.788249694002448) internal successors, (13668), 4902 states have internal predecessors, (13668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:00,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4903 states to 4903 states and 13668 transitions. [2021-06-04 21:53:00,423 INFO L78 Accepts]: Start accepts. Automaton has 4903 states and 13668 transitions. Word has length 185 [2021-06-04 21:53:00,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:00,423 INFO L482 AbstractCegarLoop]: Abstraction has 4903 states and 13668 transitions. [2021-06-04 21:53:00,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:00,424 INFO L276 IsEmpty]: Start isEmpty. Operand 4903 states and 13668 transitions. [2021-06-04 21:53:00,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:53:00,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:00,428 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:53:00,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,476 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:00,628 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:00,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:00,628 INFO L82 PathProgramCache]: Analyzing trace with hash -361708937, now seen corresponding path program 473 times [2021-06-04 21:53:00,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:00,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855078892] [2021-06-04 21:53:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:00,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:01,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:01,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855078892] [2021-06-04 21:53:01,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855078892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:01,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991652738] [2021-06-04 21:53:01,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:01,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-04 21:53:01,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:01,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:53:01,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:01,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991652738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:01,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:01,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:53:01,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744831790] [2021-06-04 21:53:01,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:53:01,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:01,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:53:01,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:53:01,352 INFO L87 Difference]: Start difference. First operand 4903 states and 13668 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:02,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:02,428 INFO L93 Difference]: Finished difference Result 6971 states and 18007 transitions. [2021-06-04 21:53:02,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-04 21:53:02,428 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:53:02,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:02,435 INFO L225 Difference]: With dead ends: 6971 [2021-06-04 21:53:02,435 INFO L226 Difference]: Without dead ends: 6701 [2021-06-04 21:53:02,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 1135.5ms TimeCoverageRelationStatistics Valid=1721, Invalid=5419, Unknown=0, NotChecked=0, Total=7140 [2021-06-04 21:53:02,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6701 states. [2021-06-04 21:53:02,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6701 to 4978. [2021-06-04 21:53:02,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4978 states, 4977 states have (on average 2.7914406268836647) internal successors, (13893), 4977 states have internal predecessors, (13893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:02,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4978 states to 4978 states and 13893 transitions. [2021-06-04 21:53:02,499 INFO L78 Accepts]: Start accepts. Automaton has 4978 states and 13893 transitions. Word has length 185 [2021-06-04 21:53:02,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:02,499 INFO L482 AbstractCegarLoop]: Abstraction has 4978 states and 13893 transitions. [2021-06-04 21:53:02,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:02,499 INFO L276 IsEmpty]: Start isEmpty. Operand 4978 states and 13893 transitions. [2021-06-04 21:53:02,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:53:02,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:02,503 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:53:02,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:02,704 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:02,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:02,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1260232377, now seen corresponding path program 474 times [2021-06-04 21:53:02,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:02,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633160950] [2021-06-04 21:53:02,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:02,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:03,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:03,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:03,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633160950] [2021-06-04 21:53:03,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633160950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:03,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453722479] [2021-06-04 21:53:03,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:03,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-04 21:53:03,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:03,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:53:03,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:03,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453722479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:03,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:03,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:53:03,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731151786] [2021-06-04 21:53:03,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:53:03,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:03,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:53:03,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:53:03,421 INFO L87 Difference]: Start difference. First operand 4978 states and 13893 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:04,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:04,719 INFO L93 Difference]: Finished difference Result 6996 states and 18132 transitions. [2021-06-04 21:53:04,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-04 21:53:04,719 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:53:04,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:04,726 INFO L225 Difference]: With dead ends: 6996 [2021-06-04 21:53:04,726 INFO L226 Difference]: Without dead ends: 6726 [2021-06-04 21:53:04,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 1351.4ms TimeCoverageRelationStatistics Valid=1753, Invalid=5729, Unknown=0, NotChecked=0, Total=7482 [2021-06-04 21:53:04,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6726 states. [2021-06-04 21:53:04,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6726 to 5053. [2021-06-04 21:53:04,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5053 states, 5052 states have (on average 2.794536817102138) internal successors, (14118), 5052 states have internal predecessors, (14118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:04,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5053 states to 5053 states and 14118 transitions. [2021-06-04 21:53:04,791 INFO L78 Accepts]: Start accepts. Automaton has 5053 states and 14118 transitions. Word has length 185 [2021-06-04 21:53:04,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:04,791 INFO L482 AbstractCegarLoop]: Abstraction has 5053 states and 14118 transitions. [2021-06-04 21:53:04,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:04,791 INFO L276 IsEmpty]: Start isEmpty. Operand 5053 states and 14118 transitions. [2021-06-04 21:53:04,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:53:04,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:04,796 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:53:04,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,478 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:04,996 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:04,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:04,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1419781429, now seen corresponding path program 475 times [2021-06-04 21:53:04,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:04,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299212797] [2021-06-04 21:53:04,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:05,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:05,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299212797] [2021-06-04 21:53:05,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299212797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:05,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119215049] [2021-06-04 21:53:05,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:05,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:53:05,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:05,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119215049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:05,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:05,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:53:05,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175910151] [2021-06-04 21:53:05,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:53:05,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:05,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:53:05,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:53:05,672 INFO L87 Difference]: Start difference. First operand 5053 states and 14118 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:06,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:06,837 INFO L93 Difference]: Finished difference Result 7021 states and 18257 transitions. [2021-06-04 21:53:06,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-04 21:53:06,837 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:53:06,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:06,843 INFO L225 Difference]: With dead ends: 7021 [2021-06-04 21:53:06,844 INFO L226 Difference]: Without dead ends: 6751 [2021-06-04 21:53:06,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1898 ImplicationChecksByTransitivity, 1210.8ms TimeCoverageRelationStatistics Valid=1825, Invalid=5657, Unknown=0, NotChecked=0, Total=7482 [2021-06-04 21:53:06,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6751 states. [2021-06-04 21:53:06,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6751 to 5128. [2021-06-04 21:53:06,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5128 states, 5127 states have (on average 2.7975424224692804) internal successors, (14343), 5127 states have internal predecessors, (14343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:06,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5128 states to 5128 states and 14343 transitions. [2021-06-04 21:53:06,907 INFO L78 Accepts]: Start accepts. Automaton has 5128 states and 14343 transitions. Word has length 185 [2021-06-04 21:53:06,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:06,907 INFO L482 AbstractCegarLoop]: Abstraction has 5128 states and 14343 transitions. [2021-06-04 21:53:06,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:06,908 INFO L276 IsEmpty]: Start isEmpty. Operand 5128 states and 14343 transitions. [2021-06-04 21:53:06,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:53:06,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:06,912 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:53:07,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:07,113 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:07,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:07,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1039337477, now seen corresponding path program 476 times [2021-06-04 21:53:07,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:07,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070018440] [2021-06-04 21:53:07,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:07,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:07,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:07,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070018440] [2021-06-04 21:53:07,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070018440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:07,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899959532] [2021-06-04 21:53:07,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:07,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:53:07,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:07,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:53:07,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:07,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:07,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899959532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:07,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:07,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:53:07,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298482702] [2021-06-04 21:53:07,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:53:07,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:07,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:53:07,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:53:07,926 INFO L87 Difference]: Start difference. First operand 5128 states and 14343 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:09,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:09,238 INFO L93 Difference]: Finished difference Result 7046 states and 18382 transitions. [2021-06-04 21:53:09,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-04 21:53:09,238 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:53:09,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:09,246 INFO L225 Difference]: With dead ends: 7046 [2021-06-04 21:53:09,246 INFO L226 Difference]: Without dead ends: 6776 [2021-06-04 21:53:09,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1939 ImplicationChecksByTransitivity, 1424.1ms TimeCoverageRelationStatistics Valid=1859, Invalid=5973, Unknown=0, NotChecked=0, Total=7832 [2021-06-04 21:53:09,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6776 states. [2021-06-04 21:53:09,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6776 to 5203. [2021-06-04 21:53:09,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5203 states, 5202 states have (on average 2.800461361014994) internal successors, (14568), 5202 states have internal predecessors, (14568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:09,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5203 states to 5203 states and 14568 transitions. [2021-06-04 21:53:09,352 INFO L78 Accepts]: Start accepts. Automaton has 5203 states and 14568 transitions. Word has length 185 [2021-06-04 21:53:09,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:09,353 INFO L482 AbstractCegarLoop]: Abstraction has 5203 states and 14568 transitions. [2021-06-04 21:53:09,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:09,353 INFO L276 IsEmpty]: Start isEmpty. Operand 5203 states and 14568 transitions. [2021-06-04 21:53:09,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:53:09,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:09,357 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:53:09,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,480 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:09,557 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:09,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:09,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1663712627, now seen corresponding path program 477 times [2021-06-04 21:53:09,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:09,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594078719] [2021-06-04 21:53:09,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:09,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:09,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594078719] [2021-06-04 21:53:09,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594078719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:09,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611575613] [2021-06-04 21:53:09,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:10,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-04 21:53:10,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:10,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:53:10,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:10,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611575613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:10,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:10,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:53:10,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203568113] [2021-06-04 21:53:10,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:53:10,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:10,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:53:10,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:53:10,234 INFO L87 Difference]: Start difference. First operand 5203 states and 14568 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:11,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:11,395 INFO L93 Difference]: Finished difference Result 7071 states and 18507 transitions. [2021-06-04 21:53:11,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-04 21:53:11,395 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:53:11,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:11,402 INFO L225 Difference]: With dead ends: 7071 [2021-06-04 21:53:11,402 INFO L226 Difference]: Without dead ends: 6801 [2021-06-04 21:53:11,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 1207.2ms TimeCoverageRelationStatistics Valid=1945, Invalid=5887, Unknown=0, NotChecked=0, Total=7832 [2021-06-04 21:53:11,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6801 states. [2021-06-04 21:53:11,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6801 to 5278. [2021-06-04 21:53:11,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.803297328027288) internal successors, (14793), 5277 states have internal predecessors, (14793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:11,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14793 transitions. [2021-06-04 21:53:11,472 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14793 transitions. Word has length 185 [2021-06-04 21:53:11,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:11,472 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14793 transitions. [2021-06-04 21:53:11,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:11,472 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14793 transitions. [2021-06-04 21:53:11,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:53:11,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:11,477 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:53:11,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable485,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:11,677 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:11,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:11,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1822202813, now seen corresponding path program 478 times [2021-06-04 21:53:11,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:11,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123100400] [2021-06-04 21:53:11,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:11,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:12,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:12,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123100400] [2021-06-04 21:53:12,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123100400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:12,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748990399] [2021-06-04 21:53:12,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:12,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:53:12,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:12,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:53:12,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:12,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:12,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748990399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:12,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:12,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:53:12,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710895419] [2021-06-04 21:53:12,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:53:12,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:12,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:53:12,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:53:12,399 INFO L87 Difference]: Start difference. First operand 5278 states and 14793 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:13,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:13,767 INFO L93 Difference]: Finished difference Result 7096 states and 18632 transitions. [2021-06-04 21:53:13,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-04 21:53:13,767 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:53:13,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:13,775 INFO L225 Difference]: With dead ends: 7096 [2021-06-04 21:53:13,775 INFO L226 Difference]: Without dead ends: 6826 [2021-06-04 21:53:13,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 1410.6ms TimeCoverageRelationStatistics Valid=1981, Invalid=6209, Unknown=0, NotChecked=0, Total=8190 [2021-06-04 21:53:13,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6826 states. [2021-06-04 21:53:13,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6826 to 5353. [2021-06-04 21:53:13,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5353 states, 5352 states have (on average 2.8060538116591927) internal successors, (15018), 5352 states have internal predecessors, (15018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:13,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5353 states to 5353 states and 15018 transitions. [2021-06-04 21:53:13,848 INFO L78 Accepts]: Start accepts. Automaton has 5353 states and 15018 transitions. Word has length 185 [2021-06-04 21:53:13,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:13,848 INFO L482 AbstractCegarLoop]: Abstraction has 5353 states and 15018 transitions. [2021-06-04 21:53:13,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:13,849 INFO L276 IsEmpty]: Start isEmpty. Operand 5353 states and 15018 transitions. [2021-06-04 21:53:13,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:53:13,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:13,853 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:53:14,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-06-04 21:53:14,054 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:14,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:14,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1080814385, now seen corresponding path program 479 times [2021-06-04 21:53:14,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:14,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844757205] [2021-06-04 21:53:14,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:14,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:14,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:14,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:14,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844757205] [2021-06-04 21:53:14,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844757205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:14,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161900637] [2021-06-04 21:53:14,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:14,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-04 21:53:14,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:14,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:53:14,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:14,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161900637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:14,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:14,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:53:14,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137732722] [2021-06-04 21:53:14,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:53:14,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:14,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:53:14,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:53:14,817 INFO L87 Difference]: Start difference. First operand 5353 states and 15018 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:16,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:16,028 INFO L93 Difference]: Finished difference Result 7121 states and 18757 transitions. [2021-06-04 21:53:16,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-04 21:53:16,029 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:53:16,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:16,036 INFO L225 Difference]: With dead ends: 7121 [2021-06-04 21:53:16,036 INFO L226 Difference]: Without dead ends: 6851 [2021-06-04 21:53:16,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2180 ImplicationChecksByTransitivity, 1279.3ms TimeCoverageRelationStatistics Valid=2081, Invalid=6109, Unknown=0, NotChecked=0, Total=8190 [2021-06-04 21:53:16,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6851 states. [2021-06-04 21:53:16,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6851 to 5428. [2021-06-04 21:53:16,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5428 states, 5427 states have (on average 2.80873410724157) internal successors, (15243), 5427 states have internal predecessors, (15243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:16,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5428 states to 5428 states and 15243 transitions. [2021-06-04 21:53:16,106 INFO L78 Accepts]: Start accepts. Automaton has 5428 states and 15243 transitions. Word has length 185 [2021-06-04 21:53:16,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:16,106 INFO L482 AbstractCegarLoop]: Abstraction has 5428 states and 15243 transitions. [2021-06-04 21:53:16,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:16,106 INFO L276 IsEmpty]: Start isEmpty. Operand 5428 states and 15243 transitions. [2021-06-04 21:53:16,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:53:16,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:16,110 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:53:16,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable487,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:16,311 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:16,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:16,311 INFO L82 PathProgramCache]: Analyzing trace with hash 835737089, now seen corresponding path program 480 times [2021-06-04 21:53:16,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:16,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6858519] [2021-06-04 21:53:16,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:16,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:16,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:16,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:16,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6858519] [2021-06-04 21:53:16,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6858519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:16,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337972714] [2021-06-04 21:53:16,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:16,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-04 21:53:16,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:16,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:53:16,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:17,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:17,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337972714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:17,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:17,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:53:17,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262041848] [2021-06-04 21:53:17,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:53:17,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:17,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:53:17,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:53:17,015 INFO L87 Difference]: Start difference. First operand 5428 states and 15243 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:18,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:18,455 INFO L93 Difference]: Finished difference Result 7146 states and 18882 transitions. [2021-06-04 21:53:18,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-04 21:53:18,456 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:53:18,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:18,462 INFO L225 Difference]: With dead ends: 7146 [2021-06-04 21:53:18,463 INFO L226 Difference]: Without dead ends: 6876 [2021-06-04 21:53:18,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 1482.7ms TimeCoverageRelationStatistics Valid=2119, Invalid=6437, Unknown=0, NotChecked=0, Total=8556 [2021-06-04 21:53:18,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6876 states. [2021-06-04 21:53:18,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6876 to 5503. [2021-06-04 21:53:18,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5503 states, 5502 states have (on average 2.8113413304253) internal successors, (15468), 5502 states have internal predecessors, (15468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:18,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5503 states to 5503 states and 15468 transitions. [2021-06-04 21:53:18,532 INFO L78 Accepts]: Start accepts. Automaton has 5503 states and 15468 transitions. Word has length 185 [2021-06-04 21:53:18,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:18,532 INFO L482 AbstractCegarLoop]: Abstraction has 5503 states and 15468 transitions. [2021-06-04 21:53:18,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:18,532 INFO L276 IsEmpty]: Start isEmpty. Operand 5503 states and 15468 transitions. [2021-06-04 21:53:18,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:53:18,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:18,537 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:53:18,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-06-04 21:53:18,737 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:18,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:18,738 INFO L82 PathProgramCache]: Analyzing trace with hash 458886767, now seen corresponding path program 481 times [2021-06-04 21:53:18,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:18,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104113176] [2021-06-04 21:53:18,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:19,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:19,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:19,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104113176] [2021-06-04 21:53:19,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104113176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:19,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778043524] [2021-06-04 21:53:19,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:19,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:53:19,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:19,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:19,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778043524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:19,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:19,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:53:19,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196633667] [2021-06-04 21:53:19,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:53:19,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:19,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:53:19,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:53:19,387 INFO L87 Difference]: Start difference. First operand 5503 states and 15468 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:20,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:20,681 INFO L93 Difference]: Finished difference Result 7171 states and 19007 transitions. [2021-06-04 21:53:20,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-04 21:53:20,681 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:53:20,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:20,686 INFO L225 Difference]: With dead ends: 7171 [2021-06-04 21:53:20,687 INFO L226 Difference]: Without dead ends: 6901 [2021-06-04 21:53:20,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2327 ImplicationChecksByTransitivity, 1305.0ms TimeCoverageRelationStatistics Valid=2233, Invalid=6323, Unknown=0, NotChecked=0, Total=8556 [2021-06-04 21:53:20,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6901 states. [2021-06-04 21:53:20,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6901 to 5578. [2021-06-04 21:53:20,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5578 states, 5577 states have (on average 2.8138784292630445) internal successors, (15693), 5577 states have internal predecessors, (15693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:20,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5578 states to 5578 states and 15693 transitions. [2021-06-04 21:53:20,752 INFO L78 Accepts]: Start accepts. Automaton has 5578 states and 15693 transitions. Word has length 185 [2021-06-04 21:53:20,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:20,752 INFO L482 AbstractCegarLoop]: Abstraction has 5578 states and 15693 transitions. [2021-06-04 21:53:20,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:20,752 INFO L276 IsEmpty]: Start isEmpty. Operand 5578 states and 15693 transitions. [2021-06-04 21:53:20,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:53:20,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:20,757 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:53:20,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:20,957 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:20,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:20,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1785642303, now seen corresponding path program 482 times [2021-06-04 21:53:20,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:20,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180088642] [2021-06-04 21:53:20,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:21,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:21,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180088642] [2021-06-04 21:53:21,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180088642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:21,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386043776] [2021-06-04 21:53:21,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:21,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:53:21,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:21,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:53:21,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:21,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:21,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386043776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:21,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:21,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:53:21,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759289073] [2021-06-04 21:53:21,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:53:21,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:21,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:53:21,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1122, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:53:21,635 INFO L87 Difference]: Start difference. First operand 5578 states and 15693 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:23,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:23,128 INFO L93 Difference]: Finished difference Result 7196 states and 19132 transitions. [2021-06-04 21:53:23,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-04 21:53:23,129 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:53:23,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:23,137 INFO L225 Difference]: With dead ends: 7196 [2021-06-04 21:53:23,137 INFO L226 Difference]: Without dead ends: 6926 [2021-06-04 21:53:23,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2377 ImplicationChecksByTransitivity, 1507.2ms TimeCoverageRelationStatistics Valid=2273, Invalid=6657, Unknown=0, NotChecked=0, Total=8930 [2021-06-04 21:53:23,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6926 states. [2021-06-04 21:53:23,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6926 to 5653. [2021-06-04 21:53:23,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5653 states, 5652 states have (on average 2.816348195329087) internal successors, (15918), 5652 states have internal predecessors, (15918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:23,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5653 states to 5653 states and 15918 transitions. [2021-06-04 21:53:23,212 INFO L78 Accepts]: Start accepts. Automaton has 5653 states and 15918 transitions. Word has length 185 [2021-06-04 21:53:23,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:23,212 INFO L482 AbstractCegarLoop]: Abstraction has 5653 states and 15918 transitions. [2021-06-04 21:53:23,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:23,212 INFO L276 IsEmpty]: Start isEmpty. Operand 5653 states and 15918 transitions. [2021-06-04 21:53:23,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:53:23,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:23,249 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:53:23,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable490 [2021-06-04 21:53:23,449 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:23,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:23,449 INFO L82 PathProgramCache]: Analyzing trace with hash -2055108819, now seen corresponding path program 483 times [2021-06-04 21:53:23,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:23,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185318403] [2021-06-04 21:53:23,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:23,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:23,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185318403] [2021-06-04 21:53:23,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185318403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:23,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063977964] [2021-06-04 21:53:23,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:23,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-04 21:53:23,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:23,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:53:23,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:24,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063977964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:24,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:24,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:53:24,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679989067] [2021-06-04 21:53:24,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:53:24,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:24,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:53:24,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:53:24,122 INFO L87 Difference]: Start difference. First operand 5653 states and 15918 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:25,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:25,423 INFO L93 Difference]: Finished difference Result 7221 states and 19257 transitions. [2021-06-04 21:53:25,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-04 21:53:25,424 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:53:25,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:25,431 INFO L225 Difference]: With dead ends: 7221 [2021-06-04 21:53:25,431 INFO L226 Difference]: Without dead ends: 6951 [2021-06-04 21:53:25,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 1326.3ms TimeCoverageRelationStatistics Valid=2401, Invalid=6529, Unknown=0, NotChecked=0, Total=8930 [2021-06-04 21:53:25,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6951 states. [2021-06-04 21:53:25,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6951 to 5728. [2021-06-04 21:53:25,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5728 states, 5727 states have (on average 2.818753273965427) internal successors, (16143), 5727 states have internal predecessors, (16143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:25,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5728 states to 5728 states and 16143 transitions. [2021-06-04 21:53:25,508 INFO L78 Accepts]: Start accepts. Automaton has 5728 states and 16143 transitions. Word has length 185 [2021-06-04 21:53:25,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:25,508 INFO L482 AbstractCegarLoop]: Abstraction has 5728 states and 16143 transitions. [2021-06-04 21:53:25,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:25,508 INFO L276 IsEmpty]: Start isEmpty. Operand 5728 states and 16143 transitions. [2021-06-04 21:53:25,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:53:25,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:25,513 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:53:25,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:25,713 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:25,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:25,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1056212483, now seen corresponding path program 484 times [2021-06-04 21:53:25,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:25,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193833197] [2021-06-04 21:53:25,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:25,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:26,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:26,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193833197] [2021-06-04 21:53:26,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193833197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:26,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592246838] [2021-06-04 21:53:26,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:26,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:53:26,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:26,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:53:26,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:26,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592246838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:26,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:26,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:53:26,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033712087] [2021-06-04 21:53:26,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:53:26,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:26,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:53:26,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:53:26,435 INFO L87 Difference]: Start difference. First operand 5728 states and 16143 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:28,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:28,014 INFO L93 Difference]: Finished difference Result 7246 states and 19382 transitions. [2021-06-04 21:53:28,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-04 21:53:28,015 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:53:28,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:28,022 INFO L225 Difference]: With dead ends: 7246 [2021-06-04 21:53:28,022 INFO L226 Difference]: Without dead ends: 6976 [2021-06-04 21:53:28,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2531 ImplicationChecksByTransitivity, 1558.7ms TimeCoverageRelationStatistics Valid=2443, Invalid=6869, Unknown=0, NotChecked=0, Total=9312 [2021-06-04 21:53:28,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6976 states. [2021-06-04 21:53:28,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6976 to 5803. [2021-06-04 21:53:28,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5803 states, 5802 states have (on average 2.8210961737331957) internal successors, (16368), 5802 states have internal predecessors, (16368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:28,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5803 states to 5803 states and 16368 transitions. [2021-06-04 21:53:28,100 INFO L78 Accepts]: Start accepts. Automaton has 5803 states and 16368 transitions. Word has length 185 [2021-06-04 21:53:28,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:28,101 INFO L482 AbstractCegarLoop]: Abstraction has 5803 states and 16368 transitions. [2021-06-04 21:53:28,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:28,101 INFO L276 IsEmpty]: Start isEmpty. Operand 5803 states and 16368 transitions. [2021-06-04 21:53:28,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:53:28,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:28,106 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:53:28,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,488 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:28,306 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:28,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:28,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1359426923, now seen corresponding path program 485 times [2021-06-04 21:53:28,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:28,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853216596] [2021-06-04 21:53:28,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:28,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:28,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:28,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853216596] [2021-06-04 21:53:28,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853216596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:28,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593811799] [2021-06-04 21:53:28,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:28,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-04 21:53:28,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:28,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:53:28,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:28,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:28,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593811799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:28,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:28,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:53:28,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526496223] [2021-06-04 21:53:28,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:53:28,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:28,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:53:28,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:53:28,990 INFO L87 Difference]: Start difference. First operand 5803 states and 16368 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:30,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:30,352 INFO L93 Difference]: Finished difference Result 7271 states and 19507 transitions. [2021-06-04 21:53:30,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-04 21:53:30,352 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:53:30,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:30,359 INFO L225 Difference]: With dead ends: 7271 [2021-06-04 21:53:30,360 INFO L226 Difference]: Without dead ends: 7001 [2021-06-04 21:53:30,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2633 ImplicationChecksByTransitivity, 1359.9ms TimeCoverageRelationStatistics Valid=2585, Invalid=6727, Unknown=0, NotChecked=0, Total=9312 [2021-06-04 21:53:30,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7001 states. [2021-06-04 21:53:30,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7001 to 5878. [2021-06-04 21:53:30,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5878 states, 5877 states have (on average 2.8233792751403777) internal successors, (16593), 5877 states have internal predecessors, (16593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:30,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5878 states to 5878 states and 16593 transitions. [2021-06-04 21:53:30,437 INFO L78 Accepts]: Start accepts. Automaton has 5878 states and 16593 transitions. Word has length 185 [2021-06-04 21:53:30,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:30,437 INFO L482 AbstractCegarLoop]: Abstraction has 5878 states and 16593 transitions. [2021-06-04 21:53:30,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:30,437 INFO L276 IsEmpty]: Start isEmpty. Operand 5878 states and 16593 transitions. [2021-06-04 21:53:30,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:53:30,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:30,442 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:53:30,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:30,642 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:30,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:30,643 INFO L82 PathProgramCache]: Analyzing trace with hash -905221061, now seen corresponding path program 486 times [2021-06-04 21:53:30,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:30,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343814478] [2021-06-04 21:53:30,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:31,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:31,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343814478] [2021-06-04 21:53:31,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343814478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:31,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376697184] [2021-06-04 21:53:31,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:31,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-04 21:53:31,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:31,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:53:31,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:31,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376697184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:31,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:31,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:53:31,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025666493] [2021-06-04 21:53:31,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:53:31,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:31,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:53:31,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:53:31,324 INFO L87 Difference]: Start difference. First operand 5878 states and 16593 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:32,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:32,955 INFO L93 Difference]: Finished difference Result 7296 states and 19632 transitions. [2021-06-04 21:53:32,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-04 21:53:32,955 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:53:32,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:32,963 INFO L225 Difference]: With dead ends: 7296 [2021-06-04 21:53:32,963 INFO L226 Difference]: Without dead ends: 7026 [2021-06-04 21:53:32,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2689 ImplicationChecksByTransitivity, 1626.4ms TimeCoverageRelationStatistics Valid=2629, Invalid=7073, Unknown=0, NotChecked=0, Total=9702 [2021-06-04 21:53:32,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7026 states. [2021-06-04 21:53:33,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7026 to 5953. [2021-06-04 21:53:33,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5953 states, 5952 states have (on average 2.8256048387096775) internal successors, (16818), 5952 states have internal predecessors, (16818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:33,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5953 states to 5953 states and 16818 transitions. [2021-06-04 21:53:33,044 INFO L78 Accepts]: Start accepts. Automaton has 5953 states and 16818 transitions. Word has length 185 [2021-06-04 21:53:33,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:33,044 INFO L482 AbstractCegarLoop]: Abstraction has 5953 states and 16818 transitions. [2021-06-04 21:53:33,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:33,044 INFO L276 IsEmpty]: Start isEmpty. Operand 5953 states and 16818 transitions. [2021-06-04 21:53:33,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:53:33,049 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:33,049 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:53:33,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable494 [2021-06-04 21:53:33,250 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:33,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:33,250 INFO L82 PathProgramCache]: Analyzing trace with hash -290981591, now seen corresponding path program 487 times [2021-06-04 21:53:33,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:33,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90857436] [2021-06-04 21:53:33,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:33,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:33,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:33,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90857436] [2021-06-04 21:53:33,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90857436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:33,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755844226] [2021-06-04 21:53:33,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:33,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:33,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:53:33,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:33,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:33,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755844226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:33,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:33,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:53:33,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928659034] [2021-06-04 21:53:33,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:53:33,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:33,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:53:33,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=992, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:53:33,898 INFO L87 Difference]: Start difference. First operand 5953 states and 16818 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:35,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:35,315 INFO L93 Difference]: Finished difference Result 7366 states and 19877 transitions. [2021-06-04 21:53:35,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-04 21:53:35,316 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:53:35,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:35,323 INFO L225 Difference]: With dead ends: 7366 [2021-06-04 21:53:35,323 INFO L226 Difference]: Without dead ends: 7096 [2021-06-04 21:53:35,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2792 ImplicationChecksByTransitivity, 1408.7ms TimeCoverageRelationStatistics Valid=2785, Invalid=6917, Unknown=0, NotChecked=0, Total=9702 [2021-06-04 21:53:35,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7096 states. [2021-06-04 21:53:35,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7096 to 6028. [2021-06-04 21:53:35,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6028 states, 6027 states have (on average 2.83026381284221) internal successors, (17058), 6027 states have internal predecessors, (17058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:35,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6028 states to 6028 states and 17058 transitions. [2021-06-04 21:53:35,398 INFO L78 Accepts]: Start accepts. Automaton has 6028 states and 17058 transitions. Word has length 185 [2021-06-04 21:53:35,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:35,398 INFO L482 AbstractCegarLoop]: Abstraction has 6028 states and 17058 transitions. [2021-06-04 21:53:35,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:35,399 INFO L276 IsEmpty]: Start isEmpty. Operand 6028 states and 17058 transitions. [2021-06-04 21:53:35,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:53:35,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:35,404 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:53:35,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:35,604 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:35,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:35,605 INFO L82 PathProgramCache]: Analyzing trace with hash -2006223879, now seen corresponding path program 488 times [2021-06-04 21:53:35,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:35,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521200714] [2021-06-04 21:53:35,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:35,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:35,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521200714] [2021-06-04 21:53:35,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521200714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:35,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588089478] [2021-06-04 21:53:35,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:36,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:53:36,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:36,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:53:36,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:36,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588089478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:36,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:36,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:53:36,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622861465] [2021-06-04 21:53:36,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:53:36,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:36,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:53:36,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:53:36,286 INFO L87 Difference]: Start difference. First operand 6028 states and 17058 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:38,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:38,089 INFO L93 Difference]: Finished difference Result 7944 states and 21503 transitions. [2021-06-04 21:53:38,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-04 21:53:38,089 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:53:38,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:38,097 INFO L225 Difference]: With dead ends: 7944 [2021-06-04 21:53:38,097 INFO L226 Difference]: Without dead ends: 7321 [2021-06-04 21:53:38,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2978 ImplicationChecksByTransitivity, 1741.8ms TimeCoverageRelationStatistics Valid=2852, Invalid=7654, Unknown=0, NotChecked=0, Total=10506 [2021-06-04 21:53:38,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7321 states. [2021-06-04 21:53:38,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7321 to 6103. [2021-06-04 21:53:38,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.833169452638479) internal successors, (17288), 6102 states have internal predecessors, (17288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:38,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17288 transitions. [2021-06-04 21:53:38,168 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17288 transitions. Word has length 185 [2021-06-04 21:53:38,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:38,168 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17288 transitions. [2021-06-04 21:53:38,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:38,168 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17288 transitions. [2021-06-04 21:53:38,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:53:38,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:38,173 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:53:38,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-04 21:53:38,374 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:38,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:38,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1256095815, now seen corresponding path program 489 times [2021-06-04 21:53:38,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:38,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578116164] [2021-06-04 21:53:38,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:38,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:38,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578116164] [2021-06-04 21:53:38,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578116164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:38,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214018009] [2021-06-04 21:53:38,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:38,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-04 21:53:38,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:38,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:53:38,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:39,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214018009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:39,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:39,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:53:39,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846370674] [2021-06-04 21:53:39,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:53:39,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:39,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:53:39,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:53:39,040 INFO L87 Difference]: Start difference. First operand 6103 states and 17288 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:40,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:40,517 INFO L93 Difference]: Finished difference Result 8148 states and 22171 transitions. [2021-06-04 21:53:40,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-04 21:53:40,517 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:53:40,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:40,524 INFO L225 Difference]: With dead ends: 8148 [2021-06-04 21:53:40,524 INFO L226 Difference]: Without dead ends: 7878 [2021-06-04 21:53:40,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2954 ImplicationChecksByTransitivity, 1446.1ms TimeCoverageRelationStatistics Valid=3002, Invalid=7098, Unknown=0, NotChecked=0, Total=10100 [2021-06-04 21:53:40,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7878 states. [2021-06-04 21:53:40,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7878 to 6283. [2021-06-04 21:53:40,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6283 states, 6282 states have (on average 2.840974212034384) internal successors, (17847), 6282 states have internal predecessors, (17847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:40,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6283 states to 6283 states and 17847 transitions. [2021-06-04 21:53:40,598 INFO L78 Accepts]: Start accepts. Automaton has 6283 states and 17847 transitions. Word has length 185 [2021-06-04 21:53:40,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:40,598 INFO L482 AbstractCegarLoop]: Abstraction has 6283 states and 17847 transitions. [2021-06-04 21:53:40,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:40,598 INFO L276 IsEmpty]: Start isEmpty. Operand 6283 states and 17847 transitions. [2021-06-04 21:53:40,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:53:40,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:40,603 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:53:40,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 493 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-04 21:53:40,803 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:40,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:40,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1278439065, now seen corresponding path program 490 times [2021-06-04 21:53:40,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:40,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438640081] [2021-06-04 21:53:40,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:40,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:41,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:41,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:41,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438640081] [2021-06-04 21:53:41,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438640081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:41,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889738437] [2021-06-04 21:53:41,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:41,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:53:41,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:41,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:53:41,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:41,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889738437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:41,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:41,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:53:41,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204162827] [2021-06-04 21:53:41,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:53:41,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:41,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:53:41,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1034, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:53:41,482 INFO L87 Difference]: Start difference. First operand 6283 states and 17847 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:43,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:43,299 INFO L93 Difference]: Finished difference Result 7610 states and 20821 transitions. [2021-06-04 21:53:43,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-04 21:53:43,299 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-06-04 21:53:43,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:43,306 INFO L225 Difference]: With dead ends: 7610 [2021-06-04 21:53:43,306 INFO L226 Difference]: Without dead ends: 7121 [2021-06-04 21:53:43,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3017 ImplicationChecksByTransitivity, 1800.1ms TimeCoverageRelationStatistics Valid=3052, Invalid=7454, Unknown=0, NotChecked=0, Total=10506 [2021-06-04 21:53:43,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7121 states. [2021-06-04 21:53:43,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7121 to 6228. [2021-06-04 21:53:43,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6228 states, 6227 states have (on average 2.8397302071623574) internal successors, (17683), 6227 states have internal predecessors, (17683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:43,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6228 states to 6228 states and 17683 transitions. [2021-06-04 21:53:43,375 INFO L78 Accepts]: Start accepts. Automaton has 6228 states and 17683 transitions. Word has length 185 [2021-06-04 21:53:43,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:43,375 INFO L482 AbstractCegarLoop]: Abstraction has 6228 states and 17683 transitions. [2021-06-04 21:53:43,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:43,375 INFO L276 IsEmpty]: Start isEmpty. Operand 6228 states and 17683 transitions. [2021-06-04 21:53:43,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:43,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:43,380 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:53:43,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-04 21:53:43,581 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:43,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:43,581 INFO L82 PathProgramCache]: Analyzing trace with hash 658293267, now seen corresponding path program 491 times [2021-06-04 21:53:43,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:43,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60801088] [2021-06-04 21:53:43,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:43,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:44,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:44,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:44,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60801088] [2021-06-04 21:53:44,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60801088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:44,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236774379] [2021-06-04 21:53:44,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:44,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-04 21:53:44,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:44,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:53:44,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:44,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:44,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236774379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:44,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:44,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 41 [2021-06-04 21:53:44,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722621744] [2021-06-04 21:53:44,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-04 21:53:44,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:44,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-04 21:53:44,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1267, Unknown=0, NotChecked=0, Total=1640 [2021-06-04 21:53:44,404 INFO L87 Difference]: Start difference. First operand 6228 states and 17683 transitions. Second operand has 41 states, 41 states have (on average 5.365853658536586) internal successors, (220), 41 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:45,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:45,358 INFO L93 Difference]: Finished difference Result 7668 states and 20883 transitions. [2021-06-04 21:53:45,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:53:45,358 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.365853658536586) internal successors, (220), 41 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-04 21:53:45,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:45,367 INFO L225 Difference]: With dead ends: 7668 [2021-06-04 21:53:45,367 INFO L226 Difference]: Without dead ends: 7334 [2021-06-04 21:53:45,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 1125.6ms TimeCoverageRelationStatistics Valid=1716, Invalid=4446, Unknown=0, NotChecked=0, Total=6162 [2021-06-04 21:53:45,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7334 states. [2021-06-04 21:53:45,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7334 to 6313. [2021-06-04 21:53:45,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6313 states, 6312 states have (on average 2.828422053231939) internal successors, (17853), 6312 states have internal predecessors, (17853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:45,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6313 states to 6313 states and 17853 transitions. [2021-06-04 21:53:45,444 INFO L78 Accepts]: Start accepts. Automaton has 6313 states and 17853 transitions. Word has length 190 [2021-06-04 21:53:45,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:45,445 INFO L482 AbstractCegarLoop]: Abstraction has 6313 states and 17853 transitions. [2021-06-04 21:53:45,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 5.365853658536586) internal successors, (220), 41 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:45,445 INFO L276 IsEmpty]: Start isEmpty. Operand 6313 states and 17853 transitions. [2021-06-04 21:53:45,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:45,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:45,450 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:53:45,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-04 21:53:45,650 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:45,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:45,651 INFO L82 PathProgramCache]: Analyzing trace with hash 2055723223, now seen corresponding path program 492 times [2021-06-04 21:53:45,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:45,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279148259] [2021-06-04 21:53:45,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:45,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:46,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:46,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:46,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279148259] [2021-06-04 21:53:46,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279148259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:46,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463227277] [2021-06-04 21:53:46,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:46,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-04 21:53:46,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:46,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:53:46,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:46,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463227277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:46,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:46,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-04 21:53:46,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451448595] [2021-06-04 21:53:46,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:53:46,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:46,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:53:46,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1076, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:53:46,507 INFO L87 Difference]: Start difference. First operand 6313 states and 17853 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:47,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:47,298 INFO L93 Difference]: Finished difference Result 9061 states and 23477 transitions. [2021-06-04 21:53:47,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:53:47,299 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-04 21:53:47,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:47,308 INFO L225 Difference]: With dead ends: 9061 [2021-06-04 21:53:47,308 INFO L226 Difference]: Without dead ends: 8791 [2021-06-04 21:53:47,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1030.8ms TimeCoverageRelationStatistics Valid=1502, Invalid=3754, Unknown=0, NotChecked=0, Total=5256 [2021-06-04 21:53:47,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8791 states. [2021-06-04 21:53:47,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8791 to 6328. [2021-06-04 21:53:47,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:47,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:53:47,390 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:53:47,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:47,390 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:53:47,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:47,390 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:53:47,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:47,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:47,395 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:53:47,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:47,596 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:47,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:47,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1885117351, now seen corresponding path program 493 times [2021-06-04 21:53:47,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:47,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855597154] [2021-06-04 21:53:47,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:48,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:48,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:48,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855597154] [2021-06-04 21:53:48,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855597154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:48,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596923666] [2021-06-04 21:53:48,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:48,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:48,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:53:48,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:48,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596923666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:48,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:48,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-04 21:53:48,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504829360] [2021-06-04 21:53:48,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:53:48,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:48,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:53:48,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1164, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:53:48,474 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:49,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:49,352 INFO L93 Difference]: Finished difference Result 8946 states and 23247 transitions. [2021-06-04 21:53:49,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:53:49,353 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-04 21:53:49,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:49,362 INFO L225 Difference]: With dead ends: 8946 [2021-06-04 21:53:49,362 INFO L226 Difference]: Without dead ends: 8676 [2021-06-04 21:53:49,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 1137.8ms TimeCoverageRelationStatistics Valid=1595, Invalid=4257, Unknown=0, NotChecked=0, Total=5852 [2021-06-04 21:53:49,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8676 states. [2021-06-04 21:53:49,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8676 to 6328. [2021-06-04 21:53:49,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:49,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:53:49,441 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:53:49,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:49,441 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:53:49,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:49,441 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:53:49,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:49,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:49,446 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:53:49,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-06-04 21:53:49,647 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:49,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:49,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1568357099, now seen corresponding path program 494 times [2021-06-04 21:53:49,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:49,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657616862] [2021-06-04 21:53:49,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:49,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:50,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:50,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657616862] [2021-06-04 21:53:50,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657616862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:50,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444436038] [2021-06-04 21:53:50,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:50,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:53:50,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:50,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:53:50,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:50,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:50,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444436038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:50,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:50,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-04 21:53:50,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205402511] [2021-06-04 21:53:50,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:53:50,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:50,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:53:50,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1105, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:53:50,437 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:51,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:51,337 INFO L93 Difference]: Finished difference Result 8921 states and 23197 transitions. [2021-06-04 21:53:51,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:53:51,337 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-04 21:53:51,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:51,345 INFO L225 Difference]: With dead ends: 8921 [2021-06-04 21:53:51,345 INFO L226 Difference]: Without dead ends: 8651 [2021-06-04 21:53:51,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 1088.5ms TimeCoverageRelationStatistics Valid=1494, Invalid=4056, Unknown=0, NotChecked=0, Total=5550 [2021-06-04 21:53:51,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8651 states. [2021-06-04 21:53:51,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8651 to 6328. [2021-06-04 21:53:51,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:51,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:53:51,419 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:53:51,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:51,419 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:53:51,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:51,419 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:53:51,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:51,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:51,424 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:53:51,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable502,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:51,625 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:51,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:51,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1578617829, now seen corresponding path program 495 times [2021-06-04 21:53:51,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:51,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859949107] [2021-06-04 21:53:51,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:52,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:52,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859949107] [2021-06-04 21:53:52,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859949107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:52,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833466275] [2021-06-04 21:53:52,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:52,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-04 21:53:52,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:52,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:53:52,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:52,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:52,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833466275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:52,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:52,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-04 21:53:52,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974980073] [2021-06-04 21:53:52,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:53:52,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:52,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:53:52,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1192, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:53:52,466 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:53,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:53,426 INFO L93 Difference]: Finished difference Result 8871 states and 23097 transitions. [2021-06-04 21:53:53,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:53:53,426 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-04 21:53:53,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:53,436 INFO L225 Difference]: With dead ends: 8871 [2021-06-04 21:53:53,436 INFO L226 Difference]: Without dead ends: 8601 [2021-06-04 21:53:53,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 1175.6ms TimeCoverageRelationStatistics Valid=1595, Invalid=4567, Unknown=0, NotChecked=0, Total=6162 [2021-06-04 21:53:53,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8601 states. [2021-06-04 21:53:53,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8601 to 6328. [2021-06-04 21:53:53,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:53,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:53:53,536 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:53:53,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:53,537 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:53:53,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:53,537 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:53:53,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:53,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:53,542 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:53:53,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-06-04 21:53:53,742 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:53,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:53,743 INFO L82 PathProgramCache]: Analyzing trace with hash -286112045, now seen corresponding path program 496 times [2021-06-04 21:53:53,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:53,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721886322] [2021-06-04 21:53:53,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:53,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:54,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:54,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:54,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721886322] [2021-06-04 21:53:54,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721886322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:54,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162573007] [2021-06-04 21:53:54,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:54,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:53:54,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:54,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:53:54,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:54,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:54,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162573007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:54,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:54,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-04 21:53:54,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371711616] [2021-06-04 21:53:54,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:53:54,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:54,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:53:54,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1130, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:53:54,515 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:55,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:55,406 INFO L93 Difference]: Finished difference Result 8821 states and 22997 transitions. [2021-06-04 21:53:55,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:53:55,406 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-04 21:53:55,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:55,415 INFO L225 Difference]: With dead ends: 8821 [2021-06-04 21:53:55,416 INFO L226 Difference]: Without dead ends: 8551 [2021-06-04 21:53:55,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 1080.7ms TimeCoverageRelationStatistics Valid=1502, Invalid=4350, Unknown=0, NotChecked=0, Total=5852 [2021-06-04 21:53:55,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8551 states. [2021-06-04 21:53:55,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8551 to 6328. [2021-06-04 21:53:55,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:55,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:53:55,495 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:53:55,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:55,495 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:53:55,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:55,496 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:53:55,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:55,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:55,501 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:53:55,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable504 [2021-06-04 21:53:55,701 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:55,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:55,701 INFO L82 PathProgramCache]: Analyzing trace with hash 411603363, now seen corresponding path program 497 times [2021-06-04 21:53:55,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:55,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599026554] [2021-06-04 21:53:55,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:56,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:56,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:56,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599026554] [2021-06-04 21:53:56,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599026554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:56,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907115542] [2021-06-04 21:53:56,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:56,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-04 21:53:56,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:56,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:53:56,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:56,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:56,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907115542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:56,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:56,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-04 21:53:56,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48215473] [2021-06-04 21:53:56,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:53:56,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:56,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:53:56,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1216, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:53:56,560 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:57,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:57,576 INFO L93 Difference]: Finished difference Result 8771 states and 22897 transitions. [2021-06-04 21:53:57,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-04 21:53:57,577 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-04 21:53:57,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:57,587 INFO L225 Difference]: With dead ends: 8771 [2021-06-04 21:53:57,587 INFO L226 Difference]: Without dead ends: 8501 [2021-06-04 21:53:57,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 1222.2ms TimeCoverageRelationStatistics Valid=1611, Invalid=4869, Unknown=0, NotChecked=0, Total=6480 [2021-06-04 21:53:57,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8501 states. [2021-06-04 21:53:57,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8501 to 6328. [2021-06-04 21:53:57,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:57,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:53:57,668 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:53:57,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:57,668 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:53:57,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:57,668 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:53:57,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:57,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:57,673 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:53:57,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:57,874 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:57,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:57,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1308279279, now seen corresponding path program 498 times [2021-06-04 21:53:57,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:57,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305428932] [2021-06-04 21:53:57,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:58,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:58,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305428932] [2021-06-04 21:53:58,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305428932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:58,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696248670] [2021-06-04 21:53:58,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:58,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-04 21:53:58,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:58,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:53:58,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:58,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:58,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696248670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:58,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:58,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-04 21:53:58,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471910917] [2021-06-04 21:53:58,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:53:58,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:58,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:53:58,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:53:58,672 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:59,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:59,622 INFO L93 Difference]: Finished difference Result 8721 states and 22797 transitions. [2021-06-04 21:53:59,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:53:59,622 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-04 21:53:59,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:59,631 INFO L225 Difference]: With dead ends: 8721 [2021-06-04 21:53:59,631 INFO L226 Difference]: Without dead ends: 8451 [2021-06-04 21:53:59,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 1138.6ms TimeCoverageRelationStatistics Valid=1526, Invalid=4636, Unknown=0, NotChecked=0, Total=6162 [2021-06-04 21:53:59,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8451 states. [2021-06-04 21:53:59,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8451 to 6328. [2021-06-04 21:53:59,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:59,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:53:59,709 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:53:59,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:59,709 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:53:59,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:59,710 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:53:59,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:59,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:59,715 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:53:59,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable506 [2021-06-04 21:53:59,915 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:59,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:59,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1809593119, now seen corresponding path program 499 times [2021-06-04 21:53:59,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:59,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782118329] [2021-06-04 21:53:59,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:00,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:00,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782118329] [2021-06-04 21:54:00,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782118329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:00,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362417267] [2021-06-04 21:54:00,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:54:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:00,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:54:00,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:00,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:00,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362417267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:00,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:00,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-04 21:54:00,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941626866] [2021-06-04 21:54:00,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:54:00,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:00,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:54:00,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:54:00,709 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:01,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:01,817 INFO L93 Difference]: Finished difference Result 8671 states and 22697 transitions. [2021-06-04 21:54:01,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:54:01,818 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-04 21:54:01,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:01,825 INFO L225 Difference]: With dead ends: 8671 [2021-06-04 21:54:01,825 INFO L226 Difference]: Without dead ends: 8401 [2021-06-04 21:54:01,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 1284.7ms TimeCoverageRelationStatistics Valid=1643, Invalid=5163, Unknown=0, NotChecked=0, Total=6806 [2021-06-04 21:54:01,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8401 states. [2021-06-04 21:54:01,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8401 to 6328. [2021-06-04 21:54:01,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:01,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:54:01,897 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:54:01,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:01,898 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:54:01,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:01,898 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:54:01,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:54:01,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:01,903 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:54:02,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 503 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2021-06-04 21:54:02,103 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:02,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:02,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1333097777, now seen corresponding path program 500 times [2021-06-04 21:54:02,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:02,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238379964] [2021-06-04 21:54:02,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:02,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:02,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:02,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238379964] [2021-06-04 21:54:02,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238379964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:02,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781988045] [2021-06-04 21:54:02,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:54:02,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:54:02,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:54:02,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:54:02,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:02,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781988045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:02,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:02,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-04 21:54:02,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605028659] [2021-06-04 21:54:02,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:54:02,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:02,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:54:02,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:54:02,852 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:03,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:03,842 INFO L93 Difference]: Finished difference Result 8621 states and 22597 transitions. [2021-06-04 21:54:03,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-04 21:54:03,843 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-04 21:54:03,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:03,852 INFO L225 Difference]: With dead ends: 8621 [2021-06-04 21:54:03,852 INFO L226 Difference]: Without dead ends: 8351 [2021-06-04 21:54:03,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 1139.7ms TimeCoverageRelationStatistics Valid=1566, Invalid=4914, Unknown=0, NotChecked=0, Total=6480 [2021-06-04 21:54:03,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8351 states. [2021-06-04 21:54:03,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8351 to 6328. [2021-06-04 21:54:03,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:03,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:54:03,931 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:54:03,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:03,931 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:54:03,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:03,931 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:54:03,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:54:03,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:03,937 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:54:04,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:54:04,137 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:04,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:04,137 INFO L82 PathProgramCache]: Analyzing trace with hash 133586335, now seen corresponding path program 501 times [2021-06-04 21:54:04,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:04,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437329571] [2021-06-04 21:54:04,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:04,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:04,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:04,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437329571] [2021-06-04 21:54:04,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437329571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:04,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522732018] [2021-06-04 21:54:04,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:54:04,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-04 21:54:04,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:54:04,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:54:04,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:04,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:04,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522732018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:04,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:04,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-04 21:54:04,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345079807] [2021-06-04 21:54:04,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:54:04,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:04,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:54:04,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:54:04,970 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:06,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:06,131 INFO L93 Difference]: Finished difference Result 8571 states and 22497 transitions. [2021-06-04 21:54:06,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-04 21:54:06,131 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-04 21:54:06,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:06,141 INFO L225 Difference]: With dead ends: 8571 [2021-06-04 21:54:06,141 INFO L226 Difference]: Without dead ends: 8301 [2021-06-04 21:54:06,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1352.1ms TimeCoverageRelationStatistics Valid=1691, Invalid=5449, Unknown=0, NotChecked=0, Total=7140 [2021-06-04 21:54:06,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8301 states. [2021-06-04 21:54:06,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8301 to 6328. [2021-06-04 21:54:06,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:06,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:54:06,220 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:54:06,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:06,220 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:54:06,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:06,220 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:54:06,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:54:06,225 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:06,225 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:54:06,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,505 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:54:06,426 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:06,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:06,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1635059, now seen corresponding path program 502 times [2021-06-04 21:54:06,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:06,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198177163] [2021-06-04 21:54:06,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:06,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:06,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198177163] [2021-06-04 21:54:06,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198177163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:06,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938833154] [2021-06-04 21:54:06,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:54:06,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:54:06,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:54:06,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:54:06,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:07,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:07,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938833154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:07,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:07,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-04 21:54:07,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943726102] [2021-06-04 21:54:07,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:54:07,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:07,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:54:07,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1181, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:54:07,247 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:08,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:08,310 INFO L93 Difference]: Finished difference Result 8521 states and 22397 transitions. [2021-06-04 21:54:08,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-04 21:54:08,311 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-04 21:54:08,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:08,320 INFO L225 Difference]: With dead ends: 8521 [2021-06-04 21:54:08,320 INFO L226 Difference]: Without dead ends: 8251 [2021-06-04 21:54:08,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1200.2ms TimeCoverageRelationStatistics Valid=1622, Invalid=5184, Unknown=0, NotChecked=0, Total=6806 [2021-06-04 21:54:08,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2021-06-04 21:54:08,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 6328. [2021-06-04 21:54:08,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:08,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:54:08,398 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:54:08,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:08,398 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:54:08,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:08,398 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:54:08,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:54:08,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:08,403 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:54:08,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-06-04 21:54:08,604 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:08,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:08,604 INFO L82 PathProgramCache]: Analyzing trace with hash -878369827, now seen corresponding path program 503 times [2021-06-04 21:54:08,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:08,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116090922] [2021-06-04 21:54:08,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:08,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:09,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:09,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:09,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116090922] [2021-06-04 21:54:09,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116090922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:09,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27912877] [2021-06-04 21:54:09,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:54:09,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-04 21:54:09,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:54:09,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:54:09,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:09,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:09,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27912877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:09,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:09,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-04 21:54:09,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996998795] [2021-06-04 21:54:09,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:54:09,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:09,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:54:09,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:54:09,381 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:10,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:10,690 INFO L93 Difference]: Finished difference Result 8471 states and 22297 transitions. [2021-06-04 21:54:10,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-04 21:54:10,691 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-04 21:54:10,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:10,699 INFO L225 Difference]: With dead ends: 8471 [2021-06-04 21:54:10,699 INFO L226 Difference]: Without dead ends: 8201 [2021-06-04 21:54:10,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 1358.5ms TimeCoverageRelationStatistics Valid=1755, Invalid=5727, Unknown=0, NotChecked=0, Total=7482 [2021-06-04 21:54:10,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8201 states. [2021-06-04 21:54:10,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8201 to 6328. [2021-06-04 21:54:10,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:10,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:54:10,778 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:54:10,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:10,778 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:54:10,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:10,778 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:54:10,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:54:10,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:10,783 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:54:10,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-06-04 21:54:10,984 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:10,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:10,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1679271115, now seen corresponding path program 504 times [2021-06-04 21:54:10,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:10,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600265324] [2021-06-04 21:54:10,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:10,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:11,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:11,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600265324] [2021-06-04 21:54:11,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600265324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:11,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113504682] [2021-06-04 21:54:11,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:54:11,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-04 21:54:11,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:54:11,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:54:11,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:11,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:11,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113504682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:11,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:11,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-04 21:54:11,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530311795] [2021-06-04 21:54:11,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:54:11,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:11,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:54:11,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1190, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:54:11,738 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:12,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:12,933 INFO L93 Difference]: Finished difference Result 8421 states and 22197 transitions. [2021-06-04 21:54:12,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-04 21:54:12,933 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-06-04 21:54:12,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:12,940 INFO L225 Difference]: With dead ends: 8421 [2021-06-04 21:54:12,941 INFO L226 Difference]: Without dead ends: 8151 [2021-06-04 21:54:12,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 1242.0ms TimeCoverageRelationStatistics Valid=1694, Invalid=5446, Unknown=0, NotChecked=0, Total=7140 [2021-06-04 21:54:12,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8151 states. [2021-06-04 21:54:13,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8151 to 6328. [2021-06-04 21:54:13,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:13,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:54:13,016 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:54:13,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:13,017 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:54:13,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:13,017 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:54:13,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:54:13,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:13,022 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-04 21:54:13,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable512,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:54:13,222 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:13,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:13,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1251147877, now seen corresponding path program 505 times [2021-06-04 21:54:13,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:13,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297934883] [2021-06-04 21:54:13,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:13,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:13,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:13,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297934883] [2021-06-04 21:54:13,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297934883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:13,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019572850] [2021-06-04 21:54:13,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:54:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:13,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:54:13,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:13,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:13,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019572850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:13,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:13,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-04 21:54:13,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635779260] [2021-06-04 21:54:13,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:54:13,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:13,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:54:13,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:54:13,999 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-04 21:54:14,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:54:15,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-06-04 21:54:15,042 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-04 21:54:15,043 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-04 21:54:15,044 WARN L196 ceAbstractionStarter]: Timeout [2021-06-04 21:54:15,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.06 09:54:15 BasicIcfg [2021-06-04 21:54:15,045 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-04 21:54:15,045 INFO L168 Benchmark]: Toolchain (without parser) took 789400.84 ms. Allocated memory was 358.6 MB in the beginning and 1.3 GB in the end (delta: 945.8 MB). Free memory was 320.6 MB in the beginning and 604.2 MB in the end (delta: -283.6 MB). Peak memory consumption was 664.0 MB. Max. memory is 16.0 GB. [2021-06-04 21:54:15,045 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 358.6 MB. Free memory was 338.8 MB in the beginning and 338.7 MB in the end (delta: 65.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-04 21:54:15,045 INFO L168 Benchmark]: CACSL2BoogieTranslator took 468.23 ms. Allocated memory is still 358.6 MB. Free memory was 320.4 MB in the beginning and 321.6 MB in the end (delta: -1.2 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.0 GB. [2021-06-04 21:54:15,045 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.13 ms. Allocated memory is still 358.6 MB. Free memory was 321.6 MB in the beginning and 319.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-04 21:54:15,045 INFO L168 Benchmark]: Boogie Preprocessor took 31.27 ms. Allocated memory is still 358.6 MB. Free memory was 319.5 MB in the beginning and 318.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-04 21:54:15,045 INFO L168 Benchmark]: RCFGBuilder took 456.82 ms. Allocated memory is still 358.6 MB. Free memory was 318.5 MB in the beginning and 295.4 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-06-04 21:54:15,046 INFO L168 Benchmark]: TraceAbstraction took 788374.84 ms. Allocated memory was 358.6 MB in the beginning and 1.3 GB in the end (delta: 945.8 MB). Free memory was 295.4 MB in the beginning and 604.2 MB in the end (delta: -308.8 MB). Peak memory consumption was 640.1 MB. Max. memory is 16.0 GB. [2021-06-04 21:54:15,046 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 358.6 MB. Free memory was 338.8 MB in the beginning and 338.7 MB in the end (delta: 65.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 468.23 ms. Allocated memory is still 358.6 MB. Free memory was 320.4 MB in the beginning and 321.6 MB in the end (delta: -1.2 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 56.13 ms. Allocated memory is still 358.6 MB. Free memory was 321.6 MB in the beginning and 319.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 31.27 ms. Allocated memory is still 358.6 MB. Free memory was 319.5 MB in the beginning and 318.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 456.82 ms. Allocated memory is still 358.6 MB. Free memory was 318.5 MB in the beginning and 295.4 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 788374.84 ms. Allocated memory was 358.6 MB in the beginning and 1.3 GB in the end (delta: 945.8 MB). Free memory was 295.4 MB in the beginning and 604.2 MB in the end (delta: -308.8 MB). Peak memory consumption was 640.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 713]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (6328states) and FLOYD_HOARE automaton (currently 39 states, 39 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 73 known predicates. - TimeoutResultAtElement [Line: 714]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (6328states) and FLOYD_HOARE automaton (currently 39 states, 39 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 73 known predicates. - TimeoutResultAtElement [Line: 722]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was constructing difference of abstraction (6328states) and FLOYD_HOARE automaton (currently 39 states, 39 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 73 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 788271.5ms, OverallIterations: 514, TraceHistogramMax: 16, EmptinessCheckTime: 1699.5ms, AutomataDifference: 398133.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 100.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 49876 SDtfs, 596269 SDslu, 543789 SDs, 0 SdLazy, 99919 SolverSat, 101775 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 65025.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100907 GetRequests, 69700 SyntacticMatches, 0 SemanticMatches, 31206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517978 ImplicationChecksByTransitivity, 406988.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=6328occurred in iteration=501, InterpolantAutomatonStates: 21838, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 23778.6ms AutomataMinimizationTime, 513 MinimizatonAttempts, 621729 StatesRemovedByMinimization, 513 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 6391.9ms SsaConstructionTime, 17630.2ms SatisfiabilityAnalysisTime, 220103.8ms InterpolantComputationTime, 139478 NumberOfCodeBlocks, 139478 NumberOfCodeBlocksAsserted, 3848 NumberOfCheckSat, 138456 ConstructedInterpolants, 0 QuantifiedInterpolants, 609586 SizeOfPredicates, 11400 NumberOfNonLiveVariables, 135784 ConjunctsInSsa, 13941 ConjunctsInUnsatCore, 1022 InterpolantComputations, 6 PerfectInterpolantSequences, 1/539244 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown