/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 07:57:09,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 07:57:09,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 07:57:09,920 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 07:57:09,921 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 07:57:09,922 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 07:57:09,923 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 07:57:09,925 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 07:57:09,926 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 07:57:09,927 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 07:57:09,928 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 07:57:09,928 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 07:57:09,929 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 07:57:09,936 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 07:57:09,937 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 07:57:09,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 07:57:09,938 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 07:57:09,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 07:57:09,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 07:57:09,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 07:57:09,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 07:57:09,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 07:57:09,948 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 07:57:09,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 07:57:09,958 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 07:57:09,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 07:57:09,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 07:57:09,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 07:57:09,966 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-Separate.epf [2021-06-05 07:57:09,987 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 07:57:09,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 07:57:09,988 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 07:57:09,988 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 07:57:09,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 07:57:09,989 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 07:57:09,989 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 07:57:09,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 07:57:09,990 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 07:57:09,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 07:57:09,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 07:57:09,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 07:57:09,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 07:57:09,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 07:57:09,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 07:57:09,991 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 07:57:09,991 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 07:57:09,991 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 07:57:09,991 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 07:57:09,991 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 07:57:09,991 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 07:57:09,991 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 07:57:09,991 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 07:57:09,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 07:57:09,992 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 07:57:09,992 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 07:57:09,992 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 07:57:09,992 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 07:57:09,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 07:57:09,992 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 07:57:09,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 07:57:09,992 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 07:57:09,993 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 07:57:10,286 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 07:57:10,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 07:57:10,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 07:57:10,307 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-05 07:57:10,321 INFO L275 PluginConnector]: CDTParser initialized [2021-06-05 07:57:10,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2021-06-05 07:57:10,379 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/233fe6643/67d7330a9c1b47c18de5f66fbcd50787/FLAGd074f7702 [2021-06-05 07:57:11,238 INFO L306 CDTParser]: Found 1 translation units. [2021-06-05 07:57:11,239 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i [2021-06-05 07:57:11,254 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/233fe6643/67d7330a9c1b47c18de5f66fbcd50787/FLAGd074f7702 [2021-06-05 07:57:11,666 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/233fe6643/67d7330a9c1b47c18de5f66fbcd50787 [2021-06-05 07:57:11,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 07:57:11,670 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-05 07:57:11,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-05 07:57:11,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-05 07:57:11,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-05 07:57:11,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 07:57:11" (1/1) ... [2021-06-05 07:57:11,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b54b7e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:57:11, skipping insertion in model container [2021-06-05 07:57:11,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 07:57:11" (1/1) ... [2021-06-05 07:57:11,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-05 07:57:11,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-05 07:57:11,987 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-longer-2.i[30963,30976] [2021-06-05 07:57:11,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 07:57:11,999 INFO L203 MainTranslator]: Completed pre-run [2021-06-05 07:57:12,058 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-longer-2.i[30963,30976] [2021-06-05 07:57:12,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 07:57:12,125 INFO L208 MainTranslator]: Completed translation [2021-06-05 07:57:12,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:57:12 WrapperNode [2021-06-05 07:57:12,128 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-05 07:57:12,129 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 07:57:12,129 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 07:57:12,129 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 07:57:12,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:57:12" (1/1) ... [2021-06-05 07:57:12,144 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:57:12" (1/1) ... [2021-06-05 07:57:12,158 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 07:57:12,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 07:57:12,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 07:57:12,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 07:57:12,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:57:12" (1/1) ... [2021-06-05 07:57:12,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:57:12" (1/1) ... [2021-06-05 07:57:12,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:57:12" (1/1) ... [2021-06-05 07:57:12,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:57:12" (1/1) ... [2021-06-05 07:57:12,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:57:12" (1/1) ... [2021-06-05 07:57:12,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:57:12" (1/1) ... [2021-06-05 07:57:12,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:57:12" (1/1) ... [2021-06-05 07:57:12,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 07:57:12,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 07:57:12,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 07:57:12,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 07:57:12,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:57:12" (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 [2021-06-05 07:57:12,260 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-05 07:57:12,260 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-05 07:57:12,261 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-05 07:57:12,261 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-05 07:57:12,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-05 07:57:12,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-05 07:57:12,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-05 07:57:12,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-05 07:57:12,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-05 07:57:12,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-05 07:57:12,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 07:57:12,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 07:57:12,265 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 07:57:12,703 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 07:57:12,704 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-05 07:57:12,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 07:57:12 BoogieIcfgContainer [2021-06-05 07:57:12,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 07:57:12,708 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 07:57:12,708 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 07:57:12,711 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 07:57:12,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.06 07:57:11" (1/3) ... [2021-06-05 07:57:12,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c3e0bad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 07:57:12, skipping insertion in model container [2021-06-05 07:57:12,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:57:12" (2/3) ... [2021-06-05 07:57:12,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c3e0bad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 07:57:12, skipping insertion in model container [2021-06-05 07:57:12,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 07:57:12" (3/3) ... [2021-06-05 07:57:12,714 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2021-06-05 07:57:12,719 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 07:57:12,719 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 07:57:12,719 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 07:57:12,720 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 07:57:12,740 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,741 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,741 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,741 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,741 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,741 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,741 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,742 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,742 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,742 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,742 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,742 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,743 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,743 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,743 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,743 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,743 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,744 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,744 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,744 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,744 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,744 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,744 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,745 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,745 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,745 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,745 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,745 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,746 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,746 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,746 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,746 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,746 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,746 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,746 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,747 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,747 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,747 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,747 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,747 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,747 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,748 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,748 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,748 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,748 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,748 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,749 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,749 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,749 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,749 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,749 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,749 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,750 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,750 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,750 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,750 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,752 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,752 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,752 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,752 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,753 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,753 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,757 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,757 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,757 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,758 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,758 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,758 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:57:12,759 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 07:57:12,776 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 07:57:12,791 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 07:57:12,791 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 07:57:12,791 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 07:57:12,791 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 07:57:12,791 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 07:57:12,791 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 07:57:12,791 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 07:57:12,792 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 07:57:12,800 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-06-05 07:57:12,894 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) [2021-06-05 07:57:12,900 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) [2021-06-05 07:57:12,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 07:57:12,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:12,917 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] [2021-06-05 07:57:12,917 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:12,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:12,922 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-06-05 07:57:12,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:12,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987350922] [2021-06-05 07:57:12,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:13,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:13,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:13,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987350922] [2021-06-05 07:57:13,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987350922] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:57:13,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:57:13,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 07:57:13,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182095090] [2021-06-05 07:57:13,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:57:13,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:13,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:57:13,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:57:13,225 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) [2021-06-05 07:57:13,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:13,380 INFO L93 Difference]: Finished difference Result 3467 states and 10030 transitions. [2021-06-05 07:57:13,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:57:13,381 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 [2021-06-05 07:57:13,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:13,400 INFO L225 Difference]: With dead ends: 3467 [2021-06-05 07:57:13,400 INFO L226 Difference]: Without dead ends: 1242 [2021-06-05 07:57:13,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:57:13,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-06-05 07:57:13,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 942. [2021-06-05 07:57:13,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 941 states have (on average 2.7077577045696066) internal successors, (2548), 941 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:13,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 2548 transitions. [2021-06-05 07:57:13,513 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 2548 transitions. Word has length 32 [2021-06-05 07:57:13,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:13,514 INFO L482 AbstractCegarLoop]: Abstraction has 942 states and 2548 transitions. [2021-06-05 07:57:13,514 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) [2021-06-05 07:57:13,514 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 2548 transitions. [2021-06-05 07:57:13,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:57:13,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:13,518 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] [2021-06-05 07:57:13,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 07:57:13,518 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:13,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:13,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1720134605, now seen corresponding path program 1 times [2021-06-05 07:57:13,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:13,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340758536] [2021-06-05 07:57:13,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:13,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:13,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:13,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340758536] [2021-06-05 07:57:13,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340758536] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:57:13,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:57:13,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 07:57:13,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926693625] [2021-06-05 07:57:13,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:57:13,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:13,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:57:13,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:57:13,637 INFO L87 Difference]: Start difference. First operand 942 states and 2548 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) [2021-06-05 07:57:13,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:13,740 INFO L93 Difference]: Finished difference Result 1194 states and 3180 transitions. [2021-06-05 07:57:13,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 07:57:13,741 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 [2021-06-05 07:57:13,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:13,747 INFO L225 Difference]: With dead ends: 1194 [2021-06-05 07:57:13,747 INFO L226 Difference]: Without dead ends: 942 [2021-06-05 07:57:13,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:57:13,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-06-05 07:57:13,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 800. [2021-06-05 07:57:13,776 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) [2021-06-05 07:57:13,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-06-05 07:57:13,781 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 36 [2021-06-05 07:57:13,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:13,783 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-06-05 07:57:13,783 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) [2021-06-05 07:57:13,783 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-06-05 07:57:13,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:57:13,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:13,788 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] [2021-06-05 07:57:13,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 07:57:13,788 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:13,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:13,790 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-06-05 07:57:13,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:13,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399830176] [2021-06-05 07:57:13,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:13,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:13,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:13,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399830176] [2021-06-05 07:57:13,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399830176] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:57:13,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:57:13,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 07:57:13,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767973253] [2021-06-05 07:57:13,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:57:13,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:13,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:57:13,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:57:13,930 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) [2021-06-05 07:57:14,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:14,078 INFO L93 Difference]: Finished difference Result 1302 states and 3436 transitions. [2021-06-05 07:57:14,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:57:14,078 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 [2021-06-05 07:57:14,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:14,083 INFO L225 Difference]: With dead ends: 1302 [2021-06-05 07:57:14,083 INFO L226 Difference]: Without dead ends: 920 [2021-06-05 07:57:14,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:57:14,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-05 07:57:14,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-06-05 07:57:14,112 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) [2021-06-05 07:57:14,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-06-05 07:57:14,115 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-06-05 07:57:14,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:14,116 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-06-05 07:57:14,116 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) [2021-06-05 07:57:14,116 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-06-05 07:57:14,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 07:57:14,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:14,117 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] [2021-06-05 07:57:14,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 07:57:14,118 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:14,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:14,125 INFO L82 PathProgramCache]: Analyzing trace with hash 307394794, now seen corresponding path program 1 times [2021-06-05 07:57:14,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:14,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816714365] [2021-06-05 07:57:14,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:14,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:14,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:14,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816714365] [2021-06-05 07:57:14,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816714365] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:57:14,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:57:14,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 07:57:14,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072420432] [2021-06-05 07:57:14,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 07:57:14,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:14,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 07:57:14,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:57:14,237 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) [2021-06-05 07:57:14,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:14,396 INFO L93 Difference]: Finished difference Result 1304 states and 3456 transitions. [2021-06-05 07:57:14,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 07:57:14,397 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 [2021-06-05 07:57:14,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:14,401 INFO L225 Difference]: With dead ends: 1304 [2021-06-05 07:57:14,402 INFO L226 Difference]: Without dead ends: 1044 [2021-06-05 07:57:14,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:57:14,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-06-05 07:57:14,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 876. [2021-06-05 07:57:14,422 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) [2021-06-05 07:57:14,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-06-05 07:57:14,425 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-06-05 07:57:14,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:14,425 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-06-05 07:57:14,425 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) [2021-06-05 07:57:14,425 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-06-05 07:57:14,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 07:57:14,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:14,427 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] [2021-06-05 07:57:14,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 07:57:14,427 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:14,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:14,428 INFO L82 PathProgramCache]: Analyzing trace with hash -258094508, now seen corresponding path program 2 times [2021-06-05 07:57:14,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:14,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467813396] [2021-06-05 07:57:14,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:14,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:14,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:14,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467813396] [2021-06-05 07:57:14,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467813396] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:57:14,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:57:14,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 07:57:14,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899370725] [2021-06-05 07:57:14,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:57:14,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:14,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:57:14,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:57:14,545 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) [2021-06-05 07:57:14,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:14,660 INFO L93 Difference]: Finished difference Result 1772 states and 4744 transitions. [2021-06-05 07:57:14,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:57:14,661 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 [2021-06-05 07:57:14,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:14,668 INFO L225 Difference]: With dead ends: 1772 [2021-06-05 07:57:14,668 INFO L226 Difference]: Without dead ends: 1505 [2021-06-05 07:57:14,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 97.0ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:57:14,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-06-05 07:57:14,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 975. [2021-06-05 07:57:14,694 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) [2021-06-05 07:57:14,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2628 transitions. [2021-06-05 07:57:14,697 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2628 transitions. Word has length 40 [2021-06-05 07:57:14,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:14,697 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 2628 transitions. [2021-06-05 07:57:14,698 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) [2021-06-05 07:57:14,698 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2628 transitions. [2021-06-05 07:57:14,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 07:57:14,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:14,699 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] [2021-06-05 07:57:14,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 07:57:14,699 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:14,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:14,700 INFO L82 PathProgramCache]: Analyzing trace with hash 129784312, now seen corresponding path program 3 times [2021-06-05 07:57:14,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:14,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779633991] [2021-06-05 07:57:14,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:14,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:14,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:14,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779633991] [2021-06-05 07:57:14,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779633991] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:57:14,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:57:14,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 07:57:14,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136898144] [2021-06-05 07:57:14,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 07:57:14,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:14,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 07:57:14,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:57:14,832 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) [2021-06-05 07:57:14,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:14,947 INFO L93 Difference]: Finished difference Result 2211 states and 5878 transitions. [2021-06-05 07:57:14,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:57:14,947 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 [2021-06-05 07:57:14,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:14,956 INFO L225 Difference]: With dead ends: 2211 [2021-06-05 07:57:14,956 INFO L226 Difference]: Without dead ends: 1944 [2021-06-05 07:57:14,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:57:14,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-06-05 07:57:14,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1127. [2021-06-05 07:57:14,992 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) [2021-06-05 07:57:14,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3119 transitions. [2021-06-05 07:57:14,996 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3119 transitions. Word has length 40 [2021-06-05 07:57:14,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:14,997 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3119 transitions. [2021-06-05 07:57:14,997 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) [2021-06-05 07:57:14,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3119 transitions. [2021-06-05 07:57:14,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 07:57:14,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:14,999 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] [2021-06-05 07:57:14,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 07:57:14,999 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:15,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:15,001 INFO L82 PathProgramCache]: Analyzing trace with hash 152127562, now seen corresponding path program 4 times [2021-06-05 07:57:15,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:15,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412748186] [2021-06-05 07:57:15,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:15,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:15,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:15,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412748186] [2021-06-05 07:57:15,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412748186] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:57:15,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:57:15,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 07:57:15,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856872684] [2021-06-05 07:57:15,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 07:57:15,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:15,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 07:57:15,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:57:15,113 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) [2021-06-05 07:57:15,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:15,272 INFO L93 Difference]: Finished difference Result 1519 states and 4031 transitions. [2021-06-05 07:57:15,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:57:15,273 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 [2021-06-05 07:57:15,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:15,279 INFO L225 Difference]: With dead ends: 1519 [2021-06-05 07:57:15,279 INFO L226 Difference]: Without dead ends: 1138 [2021-06-05 07:57:15,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:57:15,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-06-05 07:57:15,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1033. [2021-06-05 07:57:15,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.73546511627907) internal successors, (2823), 1032 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:15,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2823 transitions. [2021-06-05 07:57:15,306 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2823 transitions. Word has length 40 [2021-06-05 07:57:15,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:15,308 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 2823 transitions. [2021-06-05 07:57:15,309 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) [2021-06-05 07:57:15,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2823 transitions. [2021-06-05 07:57:15,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 07:57:15,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:15,311 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] [2021-06-05 07:57:15,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 07:57:15,312 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:15,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:15,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1301576209, now seen corresponding path program 1 times [2021-06-05 07:57:15,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:15,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469761870] [2021-06-05 07:57:15,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:15,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:15,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:15,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469761870] [2021-06-05 07:57:15,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469761870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:15,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776365239] [2021-06-05 07:57:15,434 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 [2021-06-05 07:57:15,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:15,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:57:15,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:15,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776365239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:15,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:15,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 07:57:15,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835925741] [2021-06-05 07:57:15,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:57:15,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:15,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:57:15,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:57:15,742 INFO L87 Difference]: Start difference. First operand 1033 states and 2823 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) [2021-06-05 07:57:15,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:15,879 INFO L93 Difference]: Finished difference Result 1451 states and 3787 transitions. [2021-06-05 07:57:15,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 07:57:15,879 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 [2021-06-05 07:57:15,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:15,884 INFO L225 Difference]: With dead ends: 1451 [2021-06-05 07:57:15,884 INFO L226 Difference]: Without dead ends: 1181 [2021-06-05 07:57:15,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 140.0ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:57:15,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-06-05 07:57:15,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1083. [2021-06-05 07:57:15,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 1082 states have (on average 2.7060998151571165) internal successors, (2928), 1082 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:15,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 2928 transitions. [2021-06-05 07:57:15,916 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 2928 transitions. Word has length 45 [2021-06-05 07:57:15,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:15,917 INFO L482 AbstractCegarLoop]: Abstraction has 1083 states and 2928 transitions. [2021-06-05 07:57:15,917 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) [2021-06-05 07:57:15,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 2928 transitions. [2021-06-05 07:57:15,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 07:57:15,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:15,919 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] [2021-06-05 07:57:16,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-06-05 07:57:16,143 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:16,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:16,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1689455029, now seen corresponding path program 2 times [2021-06-05 07:57:16,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:16,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345158295] [2021-06-05 07:57:16,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:16,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:16,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:16,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:16,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345158295] [2021-06-05 07:57:16,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345158295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:16,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664812531] [2021-06-05 07:57:16,245 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 [2021-06-05 07:57:16,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:57:16,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:16,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:57:16,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:16,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:16,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664812531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:16,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:16,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 07:57:16,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378656951] [2021-06-05 07:57:16,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:57:16,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:16,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:57:16,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:57:16,477 INFO L87 Difference]: Start difference. First operand 1083 states and 2928 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) [2021-06-05 07:57:16,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:16,634 INFO L93 Difference]: Finished difference Result 2333 states and 6191 transitions. [2021-06-05 07:57:16,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:57:16,634 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 [2021-06-05 07:57:16,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:16,661 INFO L225 Difference]: With dead ends: 2333 [2021-06-05 07:57:16,661 INFO L226 Difference]: Without dead ends: 2063 [2021-06-05 07:57:16,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 118.4ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:57:16,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-06-05 07:57:16,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1218. [2021-06-05 07:57:16,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 2.7666392769104355) internal successors, (3367), 1217 states have internal predecessors, (3367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:16,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 3367 transitions. [2021-06-05 07:57:16,702 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 3367 transitions. Word has length 45 [2021-06-05 07:57:16,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:16,702 INFO L482 AbstractCegarLoop]: Abstraction has 1218 states and 3367 transitions. [2021-06-05 07:57:16,702 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) [2021-06-05 07:57:16,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 3367 transitions. [2021-06-05 07:57:16,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 07:57:16,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:16,704 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] [2021-06-05 07:57:16,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:16,917 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:16,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:16,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1711798279, now seen corresponding path program 3 times [2021-06-05 07:57:16,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:16,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167739609] [2021-06-05 07:57:16,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:16,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:16,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:16,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167739609] [2021-06-05 07:57:16,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167739609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:16,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747582130] [2021-06-05 07:57:16,996 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 [2021-06-05 07:57:17,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:57:17,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:17,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:57:17,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:17,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:17,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747582130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:17,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:17,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 07:57:17,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174066230] [2021-06-05 07:57:17,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:57:17,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:17,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:57:17,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:57:17,199 INFO L87 Difference]: Start difference. First operand 1218 states and 3367 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) [2021-06-05 07:57:17,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:17,487 INFO L93 Difference]: Finished difference Result 2121 states and 5621 transitions. [2021-06-05 07:57:17,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:57:17,487 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 [2021-06-05 07:57:17,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:17,494 INFO L225 Difference]: With dead ends: 2121 [2021-06-05 07:57:17,494 INFO L226 Difference]: Without dead ends: 1546 [2021-06-05 07:57:17,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 231.1ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:57:17,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2021-06-05 07:57:17,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1253. [2021-06-05 07:57:17,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 2.7619808306709266) internal successors, (3458), 1252 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:17,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 3458 transitions. [2021-06-05 07:57:17,523 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 3458 transitions. Word has length 45 [2021-06-05 07:57:17,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:17,523 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 3458 transitions. [2021-06-05 07:57:17,523 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) [2021-06-05 07:57:17,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 3458 transitions. [2021-06-05 07:57:17,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 07:57:17,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:17,525 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] [2021-06-05 07:57:17,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 07:57:17,741 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:17,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:17,741 INFO L82 PathProgramCache]: Analyzing trace with hash 315802636, now seen corresponding path program 1 times [2021-06-05 07:57:17,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:17,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724470333] [2021-06-05 07:57:17,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:17,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:17,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724470333] [2021-06-05 07:57:17,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724470333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:17,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408200869] [2021-06-05 07:57:17,812 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 [2021-06-05 07:57:17,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:17,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:57:17,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:18,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:18,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408200869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:18,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:18,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 07:57:18,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735634321] [2021-06-05 07:57:18,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:57:18,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:18,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:57:18,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:57:18,008 INFO L87 Difference]: Start difference. First operand 1253 states and 3458 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) [2021-06-05 07:57:18,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:18,165 INFO L93 Difference]: Finished difference Result 2398 states and 6444 transitions. [2021-06-05 07:57:18,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:57:18,165 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 [2021-06-05 07:57:18,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:18,173 INFO L225 Difference]: With dead ends: 2398 [2021-06-05 07:57:18,173 INFO L226 Difference]: Without dead ends: 1926 [2021-06-05 07:57:18,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 131.0ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:57:18,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-06-05 07:57:18,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1456. [2021-06-05 07:57:18,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 2.727835051546392) internal successors, (3969), 1455 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:18,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 3969 transitions. [2021-06-05 07:57:18,208 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 3969 transitions. Word has length 45 [2021-06-05 07:57:18,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:18,208 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 3969 transitions. [2021-06-05 07:57:18,208 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) [2021-06-05 07:57:18,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 3969 transitions. [2021-06-05 07:57:18,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 07:57:18,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:18,210 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] [2021-06-05 07:57:18,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:18,434 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:18,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:18,452 INFO L82 PathProgramCache]: Analyzing trace with hash 456189922, now seen corresponding path program 1 times [2021-06-05 07:57:18,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:18,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297333822] [2021-06-05 07:57:18,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:18,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:18,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297333822] [2021-06-05 07:57:18,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297333822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:18,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396277097] [2021-06-05 07:57:18,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 07:57:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:18,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:57:18,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:18,738 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:18,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396277097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:18,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:18,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 07:57:18,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692320310] [2021-06-05 07:57:18,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:57:18,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:18,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:57:18,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:57:18,740 INFO L87 Difference]: Start difference. First operand 1456 states and 3969 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:18,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:18,912 INFO L93 Difference]: Finished difference Result 1866 states and 4917 transitions. [2021-06-05 07:57:18,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:57:18,913 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:57:18,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:18,919 INFO L225 Difference]: With dead ends: 1866 [2021-06-05 07:57:18,919 INFO L226 Difference]: Without dead ends: 1596 [2021-06-05 07:57:18,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 149.4ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:57:18,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-06-05 07:57:18,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1531. [2021-06-05 07:57:18,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 2.6921568627450982) internal successors, (4119), 1530 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:18,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4119 transitions. [2021-06-05 07:57:18,951 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4119 transitions. Word has length 55 [2021-06-05 07:57:18,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:18,952 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4119 transitions. [2021-06-05 07:57:18,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:18,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4119 transitions. [2021-06-05 07:57:18,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 07:57:18,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:18,954 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] [2021-06-05 07:57:19,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 07:57:19,178 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:19,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:19,179 INFO L82 PathProgramCache]: Analyzing trace with hash 117785766, now seen corresponding path program 2 times [2021-06-05 07:57:19,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:19,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215691983] [2021-06-05 07:57:19,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:19,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:19,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:19,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215691983] [2021-06-05 07:57:19,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215691983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:19,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408679083] [2021-06-05 07:57:19,259 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 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 [2021-06-05 07:57:19,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:57:19,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:19,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:57:19,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:19,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:19,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408679083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:19,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:19,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 07:57:19,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264061317] [2021-06-05 07:57:19,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:57:19,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:19,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:57:19,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:57:19,436 INFO L87 Difference]: Start difference. First operand 1531 states and 4119 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:19,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:19,616 INFO L93 Difference]: Finished difference Result 1981 states and 5147 transitions. [2021-06-05 07:57:19,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:57:19,617 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:57:19,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:19,621 INFO L225 Difference]: With dead ends: 1981 [2021-06-05 07:57:19,621 INFO L226 Difference]: Without dead ends: 1711 [2021-06-05 07:57:19,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:57:19,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2021-06-05 07:57:19,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1531. [2021-06-05 07:57:19,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 2.6921568627450982) internal successors, (4119), 1530 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:19,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4119 transitions. [2021-06-05 07:57:19,652 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4119 transitions. Word has length 55 [2021-06-05 07:57:19,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:19,652 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4119 transitions. [2021-06-05 07:57:19,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:19,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4119 transitions. [2021-06-05 07:57:19,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 07:57:19,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:19,655 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] [2021-06-05 07:57:19,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:19,873 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:19,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:19,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1597456522, now seen corresponding path program 3 times [2021-06-05 07:57:19,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:19,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068728609] [2021-06-05 07:57:19,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:19,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:19,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:19,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068728609] [2021-06-05 07:57:19,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068728609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:19,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596278455] [2021-06-05 07:57:19,991 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 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 [2021-06-05 07:57:20,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:57:20,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:20,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 07:57:20,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:20,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596278455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:20,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:20,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 07:57:20,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011600325] [2021-06-05 07:57:20,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:57:20,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:20,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:57:20,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:57:20,196 INFO L87 Difference]: Start difference. First operand 1531 states and 4119 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) [2021-06-05 07:57:20,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:20,476 INFO L93 Difference]: Finished difference Result 2669 states and 6993 transitions. [2021-06-05 07:57:20,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:57:20,477 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 [2021-06-05 07:57:20,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:20,483 INFO L225 Difference]: With dead ends: 2669 [2021-06-05 07:57:20,483 INFO L226 Difference]: Without dead ends: 2046 [2021-06-05 07:57:20,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 216.2ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:57:20,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-06-05 07:57:20,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1561. [2021-06-05 07:57:20,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 2.7205128205128206) internal successors, (4244), 1560 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:20,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 4244 transitions. [2021-06-05 07:57:20,516 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 4244 transitions. Word has length 55 [2021-06-05 07:57:20,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:20,516 INFO L482 AbstractCegarLoop]: Abstraction has 1561 states and 4244 transitions. [2021-06-05 07:57:20,516 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) [2021-06-05 07:57:20,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 4244 transitions. [2021-06-05 07:57:20,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 07:57:20,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:20,519 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] [2021-06-05 07:57:20,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 07:57:20,743 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:20,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:20,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1664863172, now seen corresponding path program 4 times [2021-06-05 07:57:20,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:20,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509461247] [2021-06-05 07:57:20,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:20,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:20,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:20,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509461247] [2021-06-05 07:57:20,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509461247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:20,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260252086] [2021-06-05 07:57:20,837 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 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 [2021-06-05 07:57:20,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:57:20,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:20,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:57:20,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:21,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260252086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:21,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:21,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 07:57:21,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794176853] [2021-06-05 07:57:21,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:57:21,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:21,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:57:21,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:57:21,024 INFO L87 Difference]: Start difference. First operand 1561 states and 4244 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:21,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:21,231 INFO L93 Difference]: Finished difference Result 2878 states and 7671 transitions. [2021-06-05 07:57:21,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:57:21,231 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:57:21,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:21,236 INFO L225 Difference]: With dead ends: 2878 [2021-06-05 07:57:21,237 INFO L226 Difference]: Without dead ends: 2608 [2021-06-05 07:57:21,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 168.0ms TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:57:21,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-06-05 07:57:21,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 1741. [2021-06-05 07:57:21,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 2.760344827586207) internal successors, (4803), 1740 states have internal predecessors, (4803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:21,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 4803 transitions. [2021-06-05 07:57:21,279 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 4803 transitions. Word has length 55 [2021-06-05 07:57:21,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:21,279 INFO L482 AbstractCegarLoop]: Abstraction has 1741 states and 4803 transitions. [2021-06-05 07:57:21,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:21,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 4803 transitions. [2021-06-05 07:57:21,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 07:57:21,284 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:21,284 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] [2021-06-05 07:57:21,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 07:57:21,501 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:21,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:21,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1687206422, now seen corresponding path program 5 times [2021-06-05 07:57:21,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:21,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838251826] [2021-06-05 07:57:21,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:21,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:21,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838251826] [2021-06-05 07:57:21,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838251826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:21,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617760931] [2021-06-05 07:57:21,576 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 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 [2021-06-05 07:57:21,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:57:21,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:21,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:57:21,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:21,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:21,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617760931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:21,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:21,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 07:57:21,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970079462] [2021-06-05 07:57:21,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:57:21,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:21,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:57:21,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:57:21,786 INFO L87 Difference]: Start difference. First operand 1741 states and 4803 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) [2021-06-05 07:57:22,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:22,147 INFO L93 Difference]: Finished difference Result 2821 states and 7531 transitions. [2021-06-05 07:57:22,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:57:22,148 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 [2021-06-05 07:57:22,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:22,153 INFO L225 Difference]: With dead ends: 2821 [2021-06-05 07:57:22,154 INFO L226 Difference]: Without dead ends: 2246 [2021-06-05 07:57:22,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 302.7ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:57:22,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-06-05 07:57:22,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 1656. [2021-06-05 07:57:22,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 2.730513595166163) internal successors, (4519), 1655 states have internal predecessors, (4519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:22,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 4519 transitions. [2021-06-05 07:57:22,189 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 4519 transitions. Word has length 55 [2021-06-05 07:57:22,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:22,190 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 4519 transitions. [2021-06-05 07:57:22,190 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) [2021-06-05 07:57:22,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 4519 transitions. [2021-06-05 07:57:22,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 07:57:22,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:22,195 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] [2021-06-05 07:57:22,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 07:57:22,420 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:22,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:22,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1535924432, now seen corresponding path program 6 times [2021-06-05 07:57:22,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:22,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528022076] [2021-06-05 07:57:22,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:22,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:22,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528022076] [2021-06-05 07:57:22,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528022076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:22,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725812241] [2021-06-05 07:57:22,517 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 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 [2021-06-05 07:57:22,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 07:57:22,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:22,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:57:22,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:22,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:22,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725812241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:22,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:22,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 07:57:22,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812562603] [2021-06-05 07:57:22,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:57:22,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:22,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:57:22,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:57:22,709 INFO L87 Difference]: Start difference. First operand 1656 states and 4519 transitions. Second operand has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 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) [2021-06-05 07:57:22,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:22,894 INFO L93 Difference]: Finished difference Result 2561 states and 6649 transitions. [2021-06-05 07:57:22,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:57:22,894 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 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 55 [2021-06-05 07:57:22,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:22,899 INFO L225 Difference]: With dead ends: 2561 [2021-06-05 07:57:22,900 INFO L226 Difference]: Without dead ends: 2212 [2021-06-05 07:57:22,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 161.3ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:57:22,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-06-05 07:57:22,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1658. [2021-06-05 07:57:22,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 2.7296318648159326) internal successors, (4523), 1657 states have internal predecessors, (4523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:22,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 4523 transitions. [2021-06-05 07:57:22,944 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 4523 transitions. Word has length 55 [2021-06-05 07:57:22,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:22,944 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 4523 transitions. [2021-06-05 07:57:22,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 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) [2021-06-05 07:57:22,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 4523 transitions. [2021-06-05 07:57:22,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 07:57:22,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:22,947 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] [2021-06-05 07:57:23,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 07:57:23,161 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:23,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:23,161 INFO L82 PathProgramCache]: Analyzing trace with hash 8869516, now seen corresponding path program 7 times [2021-06-05 07:57:23,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:23,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233814014] [2021-06-05 07:57:23,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:23,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:23,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:23,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233814014] [2021-06-05 07:57:23,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233814014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:23,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368026087] [2021-06-05 07:57:23,252 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 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 [2021-06-05 07:57:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:23,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:57:23,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:23,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:23,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368026087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:23,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:23,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 07:57:23,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154490038] [2021-06-05 07:57:23,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:57:23,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:23,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:57:23,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:57:23,434 INFO L87 Difference]: Start difference. First operand 1658 states and 4523 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:23,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:23,556 INFO L93 Difference]: Finished difference Result 2311 states and 5957 transitions. [2021-06-05 07:57:23,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 07:57:23,557 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:57:23,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:23,562 INFO L225 Difference]: With dead ends: 2311 [2021-06-05 07:57:23,562 INFO L226 Difference]: Without dead ends: 2026 [2021-06-05 07:57:23,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:57:23,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2021-06-05 07:57:23,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1638. [2021-06-05 07:57:23,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 2.7385461209529627) internal successors, (4483), 1637 states have internal predecessors, (4483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:23,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 4483 transitions. [2021-06-05 07:57:23,596 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 4483 transitions. Word has length 55 [2021-06-05 07:57:23,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:23,596 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 4483 transitions. [2021-06-05 07:57:23,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:23,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 4483 transitions. [2021-06-05 07:57:23,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 07:57:23,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:23,600 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] [2021-06-05 07:57:23,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:23,821 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:23,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:23,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1697636932, now seen corresponding path program 8 times [2021-06-05 07:57:23,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:23,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835910347] [2021-06-05 07:57:23,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:23,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:23,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835910347] [2021-06-05 07:57:23,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835910347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:23,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386034848] [2021-06-05 07:57:23,903 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 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 [2021-06-05 07:57:23,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:57:23,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:23,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:57:23,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:24,067 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:24,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386034848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:24,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:24,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 07:57:24,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676023467] [2021-06-05 07:57:24,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:57:24,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:24,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:57:24,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:57:24,071 INFO L87 Difference]: Start difference. First operand 1638 states and 4483 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) [2021-06-05 07:57:24,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:24,256 INFO L93 Difference]: Finished difference Result 2246 states and 5827 transitions. [2021-06-05 07:57:24,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:57:24,257 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 55 [2021-06-05 07:57:24,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:24,261 INFO L225 Difference]: With dead ends: 2246 [2021-06-05 07:57:24,261 INFO L226 Difference]: Without dead ends: 1961 [2021-06-05 07:57:24,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:57:24,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-06-05 07:57:24,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1613. [2021-06-05 07:57:24,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 2.75) internal successors, (4433), 1612 states have internal predecessors, (4433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:24,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 4433 transitions. [2021-06-05 07:57:24,289 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 4433 transitions. Word has length 55 [2021-06-05 07:57:24,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:24,289 INFO L482 AbstractCegarLoop]: Abstraction has 1613 states and 4433 transitions. [2021-06-05 07:57:24,289 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) [2021-06-05 07:57:24,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 4433 transitions. [2021-06-05 07:57:24,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 07:57:24,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:24,292 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] [2021-06-05 07:57:24,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:24,505 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:24,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:24,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1496820963, now seen corresponding path program 9 times [2021-06-05 07:57:24,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:24,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543457818] [2021-06-05 07:57:24,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:24,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:24,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543457818] [2021-06-05 07:57:24,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543457818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:24,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925269841] [2021-06-05 07:57:24,576 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 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 [2021-06-05 07:57:24,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:57:24,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:24,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:57:24,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:24,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925269841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:24,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:24,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 07:57:24,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037391931] [2021-06-05 07:57:24,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:57:24,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:24,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:57:24,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:57:24,749 INFO L87 Difference]: Start difference. First operand 1613 states and 4433 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) [2021-06-05 07:57:25,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:25,072 INFO L93 Difference]: Finished difference Result 3288 states and 8870 transitions. [2021-06-05 07:57:25,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:57:25,073 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 [2021-06-05 07:57:25,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:25,078 INFO L225 Difference]: With dead ends: 3288 [2021-06-05 07:57:25,078 INFO L226 Difference]: Without dead ends: 2476 [2021-06-05 07:57:25,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 257.6ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:57:25,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2021-06-05 07:57:25,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 1856. [2021-06-05 07:57:25,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1855 states have (on average 2.7326145552560646) internal successors, (5069), 1855 states have internal predecessors, (5069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:25,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 5069 transitions. [2021-06-05 07:57:25,137 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 5069 transitions. Word has length 55 [2021-06-05 07:57:25,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:25,137 INFO L482 AbstractCegarLoop]: Abstraction has 1856 states and 5069 transitions. [2021-06-05 07:57:25,137 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) [2021-06-05 07:57:25,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 5069 transitions. [2021-06-05 07:57:25,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:57:25,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:25,140 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] [2021-06-05 07:57:25,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 07:57:25,357 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:25,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:25,357 INFO L82 PathProgramCache]: Analyzing trace with hash -2069953421, now seen corresponding path program 10 times [2021-06-05 07:57:25,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:25,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751254081] [2021-06-05 07:57:25,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:25,479 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:25,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:25,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751254081] [2021-06-05 07:57:25,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751254081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:25,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002172758] [2021-06-05 07:57:25,479 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 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 [2021-06-05 07:57:25,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:57:25,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:25,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:57:25,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:25,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002172758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:25,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:25,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 07:57:25,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689698186] [2021-06-05 07:57:25,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:57:25,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:25,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:57:25,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:57:25,682 INFO L87 Difference]: Start difference. First operand 1856 states and 5069 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 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) [2021-06-05 07:57:25,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:25,889 INFO L93 Difference]: Finished difference Result 2316 states and 6117 transitions. [2021-06-05 07:57:25,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:57:25,890 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 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 65 [2021-06-05 07:57:25,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:25,893 INFO L225 Difference]: With dead ends: 2316 [2021-06-05 07:57:25,894 INFO L226 Difference]: Without dead ends: 2046 [2021-06-05 07:57:25,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 202.5ms TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:57:25,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-06-05 07:57:25,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1931. [2021-06-05 07:57:25,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:25,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-06-05 07:57:25,925 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-06-05 07:57:25,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:25,926 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-06-05 07:57:25,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 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) [2021-06-05 07:57:25,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-06-05 07:57:25,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:57:25,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:25,930 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] [2021-06-05 07:57:26,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:26,153 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:26,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:26,153 INFO L82 PathProgramCache]: Analyzing trace with hash -423019465, now seen corresponding path program 11 times [2021-06-05 07:57:26,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:26,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094217573] [2021-06-05 07:57:26,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:26,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:26,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:26,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094217573] [2021-06-05 07:57:26,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094217573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:26,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631882843] [2021-06-05 07:57:26,252 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 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 [2021-06-05 07:57:26,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:57:26,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:26,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:57:26,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:26,446 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:26,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631882843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:26,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:26,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 07:57:26,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625995120] [2021-06-05 07:57:26,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:57:26,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:26,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:57:26,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:57:26,448 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 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) [2021-06-05 07:57:26,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:26,666 INFO L93 Difference]: Finished difference Result 2481 states and 6447 transitions. [2021-06-05 07:57:26,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:57:26,666 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 [2021-06-05 07:57:26,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:26,671 INFO L225 Difference]: With dead ends: 2481 [2021-06-05 07:57:26,671 INFO L226 Difference]: Without dead ends: 2211 [2021-06-05 07:57:26,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 186.6ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:57:26,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-06-05 07:57:26,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 1931. [2021-06-05 07:57:26,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:26,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-06-05 07:57:26,703 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-06-05 07:57:26,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:26,703 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-06-05 07:57:26,703 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) [2021-06-05 07:57:26,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-06-05 07:57:26,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:57:26,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:26,707 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] [2021-06-05 07:57:26,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 07:57:26,931 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:26,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:26,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1607299847, now seen corresponding path program 12 times [2021-06-05 07:57:26,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:26,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631555176] [2021-06-05 07:57:26,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:27,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:27,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631555176] [2021-06-05 07:57:27,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631555176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:27,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922758739] [2021-06-05 07:57:27,067 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 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 [2021-06-05 07:57:27,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:57:27,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:27,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:57:27,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:27,271 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:27,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922758739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:27,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:27,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 07:57:27,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276771146] [2021-06-05 07:57:27,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:57:27,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:27,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:57:27,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:57:27,273 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 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) [2021-06-05 07:57:27,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:27,532 INFO L93 Difference]: Finished difference Result 2566 states and 6617 transitions. [2021-06-05 07:57:27,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:57:27,533 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 [2021-06-05 07:57:27,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:27,537 INFO L225 Difference]: With dead ends: 2566 [2021-06-05 07:57:27,537 INFO L226 Difference]: Without dead ends: 2296 [2021-06-05 07:57:27,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 270.9ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:57:27,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-06-05 07:57:27,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1931. [2021-06-05 07:57:27,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:27,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-06-05 07:57:27,569 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-06-05 07:57:27,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:27,569 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-06-05 07:57:27,569 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) [2021-06-05 07:57:27,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-06-05 07:57:27,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:57:27,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:27,576 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] [2021-06-05 07:57:27,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:27,800 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:27,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:27,800 INFO L82 PathProgramCache]: Analyzing trace with hash -2073427979, now seen corresponding path program 13 times [2021-06-05 07:57:27,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:27,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511948003] [2021-06-05 07:57:27,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:27,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:27,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511948003] [2021-06-05 07:57:27,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511948003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:27,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879807472] [2021-06-05 07:57:27,908 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 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 [2021-06-05 07:57:27,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:27,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:57:27,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:28,096 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:28,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879807472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:28,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:28,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 07:57:28,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792278001] [2021-06-05 07:57:28,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:57:28,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:28,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:57:28,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:57:28,098 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 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) [2021-06-05 07:57:28,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:28,350 INFO L93 Difference]: Finished difference Result 2496 states and 6477 transitions. [2021-06-05 07:57:28,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:57:28,351 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 [2021-06-05 07:57:28,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:28,354 INFO L225 Difference]: With dead ends: 2496 [2021-06-05 07:57:28,354 INFO L226 Difference]: Without dead ends: 2226 [2021-06-05 07:57:28,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 214.5ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:57:28,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-06-05 07:57:28,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1931. [2021-06-05 07:57:28,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:28,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-06-05 07:57:28,386 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-06-05 07:57:28,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:28,386 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-06-05 07:57:28,386 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) [2021-06-05 07:57:28,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-06-05 07:57:28,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:57:28,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:28,389 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] [2021-06-05 07:57:28,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 07:57:28,613 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:28,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:28,614 INFO L82 PathProgramCache]: Analyzing trace with hash 506297029, now seen corresponding path program 14 times [2021-06-05 07:57:28,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:28,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004321449] [2021-06-05 07:57:28,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:28,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:28,708 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:28,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:28,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004321449] [2021-06-05 07:57:28,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004321449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:28,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121013249] [2021-06-05 07:57:28,708 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 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 [2021-06-05 07:57:28,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:57:28,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:28,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:57:28,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:28,935 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:28,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121013249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:28,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:28,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 07:57:28,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139435708] [2021-06-05 07:57:28,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:57:28,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:28,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:57:28,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:57:28,936 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 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) [2021-06-05 07:57:29,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:29,309 INFO L93 Difference]: Finished difference Result 3074 states and 8103 transitions. [2021-06-05 07:57:29,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:57:29,310 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 [2021-06-05 07:57:29,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:29,313 INFO L225 Difference]: With dead ends: 3074 [2021-06-05 07:57:29,313 INFO L226 Difference]: Without dead ends: 2451 [2021-06-05 07:57:29,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 320.1ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:57:29,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-06-05 07:57:29,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1961. [2021-06-05 07:57:29,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1960 states have (on average 2.726530612244898) internal successors, (5344), 1960 states have internal predecessors, (5344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:29,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 5344 transitions. [2021-06-05 07:57:29,349 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 5344 transitions. Word has length 65 [2021-06-05 07:57:29,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:29,349 INFO L482 AbstractCegarLoop]: Abstraction has 1961 states and 5344 transitions. [2021-06-05 07:57:29,349 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) [2021-06-05 07:57:29,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 5344 transitions. [2021-06-05 07:57:29,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:57:29,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:29,352 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] [2021-06-05 07:57:29,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 07:57:29,577 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:29,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:29,577 INFO L82 PathProgramCache]: Analyzing trace with hash -526350573, now seen corresponding path program 15 times [2021-06-05 07:57:29,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:29,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735853469] [2021-06-05 07:57:29,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:29,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:29,655 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:29,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:29,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735853469] [2021-06-05 07:57:29,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735853469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:29,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324487374] [2021-06-05 07:57:29,656 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 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 [2021-06-05 07:57:29,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:57:29,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:29,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 07:57:29,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:29,847 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:29,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324487374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:29,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:29,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 07:57:29,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504331502] [2021-06-05 07:57:29,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:57:29,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:29,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:57:29,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:57:29,850 INFO L87 Difference]: Start difference. First operand 1961 states and 5344 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) [2021-06-05 07:57:30,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:30,143 INFO L93 Difference]: Finished difference Result 3278 states and 8771 transitions. [2021-06-05 07:57:30,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:57:30,143 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 [2021-06-05 07:57:30,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:30,148 INFO L225 Difference]: With dead ends: 3278 [2021-06-05 07:57:30,148 INFO L226 Difference]: Without dead ends: 3008 [2021-06-05 07:57:30,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 241.8ms TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-06-05 07:57:30,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-06-05 07:57:30,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 2141. [2021-06-05 07:57:30,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2141 states, 2140 states have (on average 2.758411214953271) internal successors, (5903), 2140 states have internal predecessors, (5903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:30,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 5903 transitions. [2021-06-05 07:57:30,188 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 5903 transitions. Word has length 65 [2021-06-05 07:57:30,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:30,189 INFO L482 AbstractCegarLoop]: Abstraction has 2141 states and 5903 transitions. [2021-06-05 07:57:30,189 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) [2021-06-05 07:57:30,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 5903 transitions. [2021-06-05 07:57:30,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:57:30,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:30,192 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] [2021-06-05 07:57:30,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 07:57:30,413 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:30,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:30,413 INFO L82 PathProgramCache]: Analyzing trace with hash -504007323, now seen corresponding path program 16 times [2021-06-05 07:57:30,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:30,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965280190] [2021-06-05 07:57:30,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:30,497 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:30,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:30,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965280190] [2021-06-05 07:57:30,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965280190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:30,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233189143] [2021-06-05 07:57:30,497 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 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 [2021-06-05 07:57:30,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:57:30,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:30,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:57:30,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:30,722 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:30,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233189143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:30,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:30,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 07:57:30,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627730377] [2021-06-05 07:57:30,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:57:30,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:30,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:57:30,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:57:30,724 INFO L87 Difference]: Start difference. First operand 2141 states and 5903 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) [2021-06-05 07:57:31,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:31,185 INFO L93 Difference]: Finished difference Result 3221 states and 8631 transitions. [2021-06-05 07:57:31,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:57:31,186 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 [2021-06-05 07:57:31,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:31,189 INFO L225 Difference]: With dead ends: 3221 [2021-06-05 07:57:31,189 INFO L226 Difference]: Without dead ends: 2646 [2021-06-05 07:57:31,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 381.4ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:57:31,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-06-05 07:57:31,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2056. [2021-06-05 07:57:31,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2056 states, 2055 states have (on average 2.7343065693430657) internal successors, (5619), 2055 states have internal predecessors, (5619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:31,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 5619 transitions. [2021-06-05 07:57:31,224 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 5619 transitions. Word has length 65 [2021-06-05 07:57:31,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:31,224 INFO L482 AbstractCegarLoop]: Abstraction has 2056 states and 5619 transitions. [2021-06-05 07:57:31,224 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) [2021-06-05 07:57:31,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 5619 transitions. [2021-06-05 07:57:31,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:57:31,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:31,227 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] [2021-06-05 07:57:31,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 07:57:31,447 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:31,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:31,447 INFO L82 PathProgramCache]: Analyzing trace with hash 211164831, now seen corresponding path program 17 times [2021-06-05 07:57:31,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:31,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389744160] [2021-06-05 07:57:31,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:31,552 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:31,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:31,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389744160] [2021-06-05 07:57:31,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389744160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:31,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136293398] [2021-06-05 07:57:31,553 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 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 [2021-06-05 07:57:31,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:57:31,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:31,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:57:31,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:31,773 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:31,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136293398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:31,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:31,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 07:57:31,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937743316] [2021-06-05 07:57:31,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:57:31,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:31,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:57:31,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:31,776 INFO L87 Difference]: Start difference. First operand 2056 states and 5619 transitions. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 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) [2021-06-05 07:57:31,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:31,964 INFO L93 Difference]: Finished difference Result 3061 states and 7949 transitions. [2021-06-05 07:57:31,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:57:31,964 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 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 65 [2021-06-05 07:57:31,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:31,967 INFO L225 Difference]: With dead ends: 3061 [2021-06-05 07:57:31,967 INFO L226 Difference]: Without dead ends: 2712 [2021-06-05 07:57:31,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 195.8ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:57:31,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-06-05 07:57:31,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2058. [2021-06-05 07:57:31,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2058 states, 2057 states have (on average 2.733592610597958) internal successors, (5623), 2057 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:31,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 5623 transitions. [2021-06-05 07:57:31,996 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 5623 transitions. Word has length 65 [2021-06-05 07:57:31,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:31,996 INFO L482 AbstractCegarLoop]: Abstraction has 2058 states and 5623 transitions. [2021-06-05 07:57:31,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 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) [2021-06-05 07:57:31,996 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 5623 transitions. [2021-06-05 07:57:31,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:57:31,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:31,999 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] [2021-06-05 07:57:32,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 07:57:32,222 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:32,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:32,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1649663653, now seen corresponding path program 18 times [2021-06-05 07:57:32,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:32,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214519491] [2021-06-05 07:57:32,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:32,310 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:32,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:32,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214519491] [2021-06-05 07:57:32,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214519491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:32,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147575373] [2021-06-05 07:57:32,310 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 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 [2021-06-05 07:57:32,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:57:32,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:32,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:57:32,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:32,492 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:32,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147575373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:32,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:32,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 07:57:32,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533174709] [2021-06-05 07:57:32,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:57:32,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:32,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:57:32,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:57:32,493 INFO L87 Difference]: Start difference. First operand 2058 states and 5623 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 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) [2021-06-05 07:57:32,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:32,662 INFO L93 Difference]: Finished difference Result 2861 states and 7357 transitions. [2021-06-05 07:57:32,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:57:32,663 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 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 [2021-06-05 07:57:32,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:32,665 INFO L225 Difference]: With dead ends: 2861 [2021-06-05 07:57:32,665 INFO L226 Difference]: Without dead ends: 2576 [2021-06-05 07:57:32,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 157.0ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:57:32,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-06-05 07:57:32,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 2038. [2021-06-05 07:57:32,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2038 states, 2037 states have (on average 2.74079528718704) internal successors, (5583), 2037 states have internal predecessors, (5583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:32,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 5583 transitions. [2021-06-05 07:57:32,698 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 5583 transitions. Word has length 65 [2021-06-05 07:57:32,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:32,698 INFO L482 AbstractCegarLoop]: Abstraction has 2038 states and 5583 transitions. [2021-06-05 07:57:32,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 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) [2021-06-05 07:57:32,698 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 5583 transitions. [2021-06-05 07:57:32,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:57:32,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:32,701 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] [2021-06-05 07:57:32,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:32,924 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:32,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:32,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1345737589, now seen corresponding path program 19 times [2021-06-05 07:57:32,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:32,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32302182] [2021-06-05 07:57:32,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:33,026 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:33,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:33,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32302182] [2021-06-05 07:57:33,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32302182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:33,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140237681] [2021-06-05 07:57:33,027 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 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 [2021-06-05 07:57:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:33,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:57:33,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:33,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140237681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:33,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:33,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 07:57:33,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632819790] [2021-06-05 07:57:33,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:57:33,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:33,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:57:33,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:57:33,221 INFO L87 Difference]: Start difference. First operand 2038 states and 5583 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 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) [2021-06-05 07:57:33,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:33,415 INFO L93 Difference]: Finished difference Result 2796 states and 7227 transitions. [2021-06-05 07:57:33,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:57:33,415 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 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 [2021-06-05 07:57:33,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:33,418 INFO L225 Difference]: With dead ends: 2796 [2021-06-05 07:57:33,418 INFO L226 Difference]: Without dead ends: 2511 [2021-06-05 07:57:33,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 189.6ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:57:33,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2021-06-05 07:57:33,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2013. [2021-06-05 07:57:33,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2013 states, 2012 states have (on average 2.75) internal successors, (5533), 2012 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:33,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 5533 transitions. [2021-06-05 07:57:33,448 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 5533 transitions. Word has length 65 [2021-06-05 07:57:33,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:33,448 INFO L482 AbstractCegarLoop]: Abstraction has 2013 states and 5533 transitions. [2021-06-05 07:57:33,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 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) [2021-06-05 07:57:33,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 5533 transitions. [2021-06-05 07:57:33,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:57:33,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:33,451 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] [2021-06-05 07:57:33,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 07:57:33,673 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:33,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:33,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1991900067, now seen corresponding path program 20 times [2021-06-05 07:57:33,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:33,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355933307] [2021-06-05 07:57:33,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:33,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:33,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355933307] [2021-06-05 07:57:33,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355933307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:33,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872156734] [2021-06-05 07:57:33,745 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 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 [2021-06-05 07:57:33,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:57:33,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:33,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:57:33,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:33,889 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:33,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872156734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:33,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:33,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 07:57:33,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061427132] [2021-06-05 07:57:33,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:57:33,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:33,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:57:33,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:57:33,890 INFO L87 Difference]: Start difference. First operand 2013 states and 5533 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 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) [2021-06-05 07:57:34,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:34,042 INFO L93 Difference]: Finished difference Result 2721 states and 7077 transitions. [2021-06-05 07:57:34,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:57:34,043 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 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 [2021-06-05 07:57:34,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:34,045 INFO L225 Difference]: With dead ends: 2721 [2021-06-05 07:57:34,045 INFO L226 Difference]: Without dead ends: 2436 [2021-06-05 07:57:34,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 139.0ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:57:34,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-06-05 07:57:34,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1988. [2021-06-05 07:57:34,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 2.7594363361852037) internal successors, (5483), 1987 states have internal predecessors, (5483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:34,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 5483 transitions. [2021-06-05 07:57:34,069 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 5483 transitions. Word has length 65 [2021-06-05 07:57:34,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:34,069 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 5483 transitions. [2021-06-05 07:57:34,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 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) [2021-06-05 07:57:34,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 5483 transitions. [2021-06-05 07:57:34,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:57:34,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:34,072 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] [2021-06-05 07:57:34,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:34,281 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:34,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:34,281 INFO L82 PathProgramCache]: Analyzing trace with hash 596560781, now seen corresponding path program 21 times [2021-06-05 07:57:34,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:34,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583895462] [2021-06-05 07:57:34,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:34,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:34,361 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:34,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:34,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583895462] [2021-06-05 07:57:34,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583895462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:34,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660577085] [2021-06-05 07:57:34,361 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 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 [2021-06-05 07:57:34,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:57:34,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:34,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:57:34,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:34,523 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:34,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660577085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:34,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:34,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 07:57:34,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146812686] [2021-06-05 07:57:34,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:57:34,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:34,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:57:34,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:57:34,524 INFO L87 Difference]: Start difference. First operand 1988 states and 5483 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 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) [2021-06-05 07:57:34,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:34,742 INFO L93 Difference]: Finished difference Result 2646 states and 6927 transitions. [2021-06-05 07:57:34,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:57:34,742 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 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 [2021-06-05 07:57:34,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:34,745 INFO L225 Difference]: With dead ends: 2646 [2021-06-05 07:57:34,745 INFO L226 Difference]: Without dead ends: 2361 [2021-06-05 07:57:34,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 189.7ms TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:57:34,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-06-05 07:57:34,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1963. [2021-06-05 07:57:34,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 2.7691131498470947) internal successors, (5433), 1962 states have internal predecessors, (5433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:34,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 5433 transitions. [2021-06-05 07:57:34,770 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 5433 transitions. Word has length 65 [2021-06-05 07:57:34,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:34,771 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 5433 transitions. [2021-06-05 07:57:34,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 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) [2021-06-05 07:57:34,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 5433 transitions. [2021-06-05 07:57:34,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 07:57:34,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:34,773 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] [2021-06-05 07:57:34,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 07:57:34,989 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:34,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:34,989 INFO L82 PathProgramCache]: Analyzing trace with hash 797376750, now seen corresponding path program 22 times [2021-06-05 07:57:34,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:34,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619017405] [2021-06-05 07:57:34,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:35,071 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:35,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:35,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619017405] [2021-06-05 07:57:35,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619017405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:35,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132600755] [2021-06-05 07:57:35,071 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 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 [2021-06-05 07:57:35,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:57:35,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:35,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:57:35,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:35,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132600755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:35,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:35,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 07:57:35,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496203425] [2021-06-05 07:57:35,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:57:35,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:35,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:57:35,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:57:35,271 INFO L87 Difference]: Start difference. First operand 1963 states and 5433 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) [2021-06-05 07:57:35,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:35,576 INFO L93 Difference]: Finished difference Result 3688 states and 9970 transitions. [2021-06-05 07:57:35,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:57:35,577 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 [2021-06-05 07:57:35,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:35,580 INFO L225 Difference]: With dead ends: 3688 [2021-06-05 07:57:35,580 INFO L226 Difference]: Without dead ends: 2876 [2021-06-05 07:57:35,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 271.3ms TimeCoverageRelationStatistics Valid=266, Invalid=726, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:57:35,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-06-05 07:57:35,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2256. [2021-06-05 07:57:35,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 2.73569844789357) internal successors, (6169), 2255 states have internal predecessors, (6169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:35,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 6169 transitions. [2021-06-05 07:57:35,605 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 6169 transitions. Word has length 65 [2021-06-05 07:57:35,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:35,605 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 6169 transitions. [2021-06-05 07:57:35,605 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) [2021-06-05 07:57:35,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 6169 transitions. [2021-06-05 07:57:35,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:35,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:35,608 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] [2021-06-05 07:57:35,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 07:57:35,808 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:35,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:35,809 INFO L82 PathProgramCache]: Analyzing trace with hash -710713404, now seen corresponding path program 23 times [2021-06-05 07:57:35,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:35,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156608159] [2021-06-05 07:57:35,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:35,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:35,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:35,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156608159] [2021-06-05 07:57:35,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156608159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:35,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632990475] [2021-06-05 07:57:35,932 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 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 [2021-06-05 07:57:35,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:57:35,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:35,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:57:35,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:36,102 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:36,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632990475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:36,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:36,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 07:57:36,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540742910] [2021-06-05 07:57:36,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:57:36,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:36,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:57:36,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:36,103 INFO L87 Difference]: Start difference. First operand 2256 states and 6169 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:36,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:36,328 INFO L93 Difference]: Finished difference Result 2766 states and 7317 transitions. [2021-06-05 07:57:36,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:57:36,328 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:57:36,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:36,331 INFO L225 Difference]: With dead ends: 2766 [2021-06-05 07:57:36,331 INFO L226 Difference]: Without dead ends: 2496 [2021-06-05 07:57:36,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 236.9ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:57:36,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-06-05 07:57:36,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2331. [2021-06-05 07:57:36,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:36,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-06-05 07:57:36,388 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-06-05 07:57:36,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:36,388 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-06-05 07:57:36,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:36,389 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-06-05 07:57:36,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:36,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:36,391 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] [2021-06-05 07:57:36,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 07:57:36,591 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:36,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:36,592 INFO L82 PathProgramCache]: Analyzing trace with hash 751678088, now seen corresponding path program 24 times [2021-06-05 07:57:36,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:36,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88494056] [2021-06-05 07:57:36,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:36,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:36,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:36,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88494056] [2021-06-05 07:57:36,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88494056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:36,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594359293] [2021-06-05 07:57:36,702 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 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 [2021-06-05 07:57:36,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:57:36,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:36,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:57:36,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:36,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594359293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:36,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:36,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 07:57:36,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013283771] [2021-06-05 07:57:36,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:57:36,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:36,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:57:36,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:57:36,882 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:37,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:37,090 INFO L93 Difference]: Finished difference Result 2981 states and 7747 transitions. [2021-06-05 07:57:37,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:57:37,090 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:57:37,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:37,093 INFO L225 Difference]: With dead ends: 2981 [2021-06-05 07:57:37,093 INFO L226 Difference]: Without dead ends: 2711 [2021-06-05 07:57:37,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 197.5ms TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:57:37,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-06-05 07:57:37,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 2331. [2021-06-05 07:57:37,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:37,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-06-05 07:57:37,116 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-06-05 07:57:37,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:37,117 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-06-05 07:57:37,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:37,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-06-05 07:57:37,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:37,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:37,119 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] [2021-06-05 07:57:37,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 07:57:37,320 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:37,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:37,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1750574424, now seen corresponding path program 25 times [2021-06-05 07:57:37,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:37,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440743745] [2021-06-05 07:57:37,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:37,458 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:37,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:37,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440743745] [2021-06-05 07:57:37,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440743745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:37,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236208541] [2021-06-05 07:57:37,458 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 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 [2021-06-05 07:57:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:37,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:57:37,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:37,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236208541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:37,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:37,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 07:57:37,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137558691] [2021-06-05 07:57:37,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:57:37,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:37,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:57:37,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:37,646 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 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) [2021-06-05 07:57:37,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:37,922 INFO L93 Difference]: Finished difference Result 3116 states and 8017 transitions. [2021-06-05 07:57:37,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:57:37,923 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 [2021-06-05 07:57:37,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:37,925 INFO L225 Difference]: With dead ends: 3116 [2021-06-05 07:57:37,925 INFO L226 Difference]: Without dead ends: 2846 [2021-06-05 07:57:37,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 261.5ms TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:57:37,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-06-05 07:57:37,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 2331. [2021-06-05 07:57:37,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:37,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-06-05 07:57:37,949 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-06-05 07:57:37,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:37,949 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-06-05 07:57:37,949 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) [2021-06-05 07:57:37,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-06-05 07:57:37,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:37,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:37,952 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] [2021-06-05 07:57:38,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 07:57:38,153 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:38,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:38,153 INFO L82 PathProgramCache]: Analyzing trace with hash -128753466, now seen corresponding path program 26 times [2021-06-05 07:57:38,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:38,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445310708] [2021-06-05 07:57:38,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:38,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:38,261 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:38,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:38,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445310708] [2021-06-05 07:57:38,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445310708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:38,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810388319] [2021-06-05 07:57:38,262 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 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 [2021-06-05 07:57:38,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:57:38,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:38,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:57:38,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:38,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810388319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:38,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:38,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 07:57:38,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623539089] [2021-06-05 07:57:38,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:57:38,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:38,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:57:38,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:57:38,500 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:38,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:38,756 INFO L93 Difference]: Finished difference Result 3046 states and 7877 transitions. [2021-06-05 07:57:38,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:57:38,756 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:57:38,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:38,759 INFO L225 Difference]: With dead ends: 3046 [2021-06-05 07:57:38,759 INFO L226 Difference]: Without dead ends: 2776 [2021-06-05 07:57:38,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 234.7ms TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:57:38,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-06-05 07:57:38,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2331. [2021-06-05 07:57:38,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:38,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-06-05 07:57:38,784 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-06-05 07:57:38,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:38,784 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-06-05 07:57:38,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:38,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-06-05 07:57:38,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:38,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:38,787 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] [2021-06-05 07:57:38,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:38,988 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:38,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:38,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1901565846, now seen corresponding path program 27 times [2021-06-05 07:57:38,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:38,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944679126] [2021-06-05 07:57:38,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:38,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:39,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:39,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944679126] [2021-06-05 07:57:39,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944679126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:39,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341345471] [2021-06-05 07:57:39,097 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 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 [2021-06-05 07:57:39,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 07:57:39,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:39,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:57:39,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:39,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341345471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:39,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:39,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 07:57:39,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374598799] [2021-06-05 07:57:39,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:57:39,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:39,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:57:39,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:39,303 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 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) [2021-06-05 07:57:39,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:39,633 INFO L93 Difference]: Finished difference Result 2971 states and 7727 transitions. [2021-06-05 07:57:39,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:57:39,633 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 [2021-06-05 07:57:39,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:39,636 INFO L225 Difference]: With dead ends: 2971 [2021-06-05 07:57:39,637 INFO L226 Difference]: Without dead ends: 2701 [2021-06-05 07:57:39,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 315.7ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:57:39,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-06-05 07:57:39,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2331. [2021-06-05 07:57:39,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:39,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-06-05 07:57:39,669 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-06-05 07:57:39,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:39,670 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-06-05 07:57:39,670 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) [2021-06-05 07:57:39,670 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-06-05 07:57:39,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:39,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:39,673 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] [2021-06-05 07:57:39,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 07:57:39,896 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:39,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:39,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1779161980, now seen corresponding path program 28 times [2021-06-05 07:57:39,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:39,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262706316] [2021-06-05 07:57:39,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:39,987 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:39,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:39,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262706316] [2021-06-05 07:57:39,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262706316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:39,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256466252] [2021-06-05 07:57:39,987 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 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 [2021-06-05 07:57:40,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:57:40,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:40,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:57:40,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:40,181 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:40,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256466252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:40,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:40,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 07:57:40,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594727] [2021-06-05 07:57:40,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:57:40,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:40,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:57:40,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:57:40,183 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:40,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:40,486 INFO L93 Difference]: Finished difference Result 2896 states and 7577 transitions. [2021-06-05 07:57:40,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:57:40,486 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:57:40,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:40,490 INFO L225 Difference]: With dead ends: 2896 [2021-06-05 07:57:40,490 INFO L226 Difference]: Without dead ends: 2626 [2021-06-05 07:57:40,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 249.3ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:57:40,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-06-05 07:57:40,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 2331. [2021-06-05 07:57:40,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:40,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-06-05 07:57:40,521 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-06-05 07:57:40,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:40,521 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-06-05 07:57:40,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:40,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-06-05 07:57:40,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:40,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:40,524 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] [2021-06-05 07:57:40,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 07:57:40,737 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:40,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:40,737 INFO L82 PathProgramCache]: Analyzing trace with hash 800563028, now seen corresponding path program 29 times [2021-06-05 07:57:40,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:40,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113372662] [2021-06-05 07:57:40,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:40,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:40,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113372662] [2021-06-05 07:57:40,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113372662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:40,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80333834] [2021-06-05 07:57:40,843 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 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 [2021-06-05 07:57:40,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:57:40,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:40,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:57:40,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:41,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80333834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:41,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:41,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 07:57:41,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905078663] [2021-06-05 07:57:41,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:57:41,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:41,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:57:41,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:41,028 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 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) [2021-06-05 07:57:41,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:41,431 INFO L93 Difference]: Finished difference Result 3474 states and 9203 transitions. [2021-06-05 07:57:41,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:57:41,432 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 [2021-06-05 07:57:41,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:41,435 INFO L225 Difference]: With dead ends: 3474 [2021-06-05 07:57:41,435 INFO L226 Difference]: Without dead ends: 2851 [2021-06-05 07:57:41,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 357.6ms TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:57:41,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-06-05 07:57:41,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2361. [2021-06-05 07:57:41,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2360 states have (on average 2.730508474576271) internal successors, (6444), 2360 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:41,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 6444 transitions. [2021-06-05 07:57:41,470 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 6444 transitions. Word has length 75 [2021-06-05 07:57:41,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:41,471 INFO L482 AbstractCegarLoop]: Abstraction has 2361 states and 6444 transitions. [2021-06-05 07:57:41,471 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) [2021-06-05 07:57:41,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 6444 transitions. [2021-06-05 07:57:41,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:41,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:41,474 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] [2021-06-05 07:57:41,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:41,697 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:41,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:41,697 INFO L82 PathProgramCache]: Analyzing trace with hash -232084574, now seen corresponding path program 30 times [2021-06-05 07:57:41,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:41,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786661400] [2021-06-05 07:57:41,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:41,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:41,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786661400] [2021-06-05 07:57:41,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786661400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:41,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948169533] [2021-06-05 07:57:41,784 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 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 [2021-06-05 07:57:41,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:57:41,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:41,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:41,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:41,956 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:41,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948169533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:41,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:41,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 07:57:41,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199015121] [2021-06-05 07:57:41,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:57:41,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:41,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:57:41,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:57:41,957 INFO L87 Difference]: Start difference. First operand 2361 states and 6444 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:42,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:42,294 INFO L93 Difference]: Finished difference Result 3678 states and 9871 transitions. [2021-06-05 07:57:42,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:57:42,295 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:57:42,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:42,298 INFO L225 Difference]: With dead ends: 3678 [2021-06-05 07:57:42,298 INFO L226 Difference]: Without dead ends: 3408 [2021-06-05 07:57:42,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 294.0ms TimeCoverageRelationStatistics Valid=340, Invalid=850, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:57:42,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2021-06-05 07:57:42,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 2541. [2021-06-05 07:57:42,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2541 states, 2540 states have (on average 2.7570866141732284) internal successors, (7003), 2540 states have internal predecessors, (7003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:42,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2541 states to 2541 states and 7003 transitions. [2021-06-05 07:57:42,328 INFO L78 Accepts]: Start accepts. Automaton has 2541 states and 7003 transitions. Word has length 75 [2021-06-05 07:57:42,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:42,328 INFO L482 AbstractCegarLoop]: Abstraction has 2541 states and 7003 transitions. [2021-06-05 07:57:42,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:42,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2541 states and 7003 transitions. [2021-06-05 07:57:42,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:42,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:42,330 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] [2021-06-05 07:57:42,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 07:57:42,531 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:42,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:42,532 INFO L82 PathProgramCache]: Analyzing trace with hash -209741324, now seen corresponding path program 31 times [2021-06-05 07:57:42,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:42,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986318324] [2021-06-05 07:57:42,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:42,625 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:42,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:42,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986318324] [2021-06-05 07:57:42,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986318324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:42,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197236201] [2021-06-05 07:57:42,626 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 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 [2021-06-05 07:57:42,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:42,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:57:42,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:42,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197236201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:42,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:42,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 07:57:42,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075043914] [2021-06-05 07:57:42,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:57:42,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:42,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:57:42,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:42,811 INFO L87 Difference]: Start difference. First operand 2541 states and 7003 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) [2021-06-05 07:57:43,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:43,203 INFO L93 Difference]: Finished difference Result 3125 states and 8491 transitions. [2021-06-05 07:57:43,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:57:43,203 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 [2021-06-05 07:57:43,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:43,206 INFO L225 Difference]: With dead ends: 3125 [2021-06-05 07:57:43,206 INFO L226 Difference]: Without dead ends: 2636 [2021-06-05 07:57:43,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 354.2ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:57:43,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2021-06-05 07:57:43,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2486. [2021-06-05 07:57:43,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 2.752112676056338) internal successors, (6839), 2485 states have internal predecessors, (6839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:43,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 6839 transitions. [2021-06-05 07:57:43,234 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 6839 transitions. Word has length 75 [2021-06-05 07:57:43,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:43,234 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 6839 transitions. [2021-06-05 07:57:43,234 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) [2021-06-05 07:57:43,234 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 6839 transitions. [2021-06-05 07:57:43,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:43,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:43,236 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] [2021-06-05 07:57:43,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:43,437 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:43,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:43,438 INFO L82 PathProgramCache]: Analyzing trace with hash 685387182, now seen corresponding path program 32 times [2021-06-05 07:57:43,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:43,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423096246] [2021-06-05 07:57:43,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:43,586 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:43,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:43,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423096246] [2021-06-05 07:57:43,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423096246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:43,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266561920] [2021-06-05 07:57:43,586 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 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 [2021-06-05 07:57:43,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:57:43,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:43,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 07:57:43,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:43,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266561920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:43,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:43,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 07:57:43,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756127896] [2021-06-05 07:57:43,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:57:43,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:43,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:57:43,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:57:43,799 INFO L87 Difference]: Start difference. First operand 2486 states and 6839 transitions. Second operand has 16 states, 16 states have (on average 6.4375) internal successors, (103), 16 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) [2021-06-05 07:57:44,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:44,039 INFO L93 Difference]: Finished difference Result 3591 states and 9369 transitions. [2021-06-05 07:57:44,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:57:44,040 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.4375) internal successors, (103), 16 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 75 [2021-06-05 07:57:44,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:44,043 INFO L225 Difference]: With dead ends: 3591 [2021-06-05 07:57:44,043 INFO L226 Difference]: Without dead ends: 3242 [2021-06-05 07:57:44,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 269.4ms TimeCoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2021-06-05 07:57:44,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2021-06-05 07:57:44,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 2488. [2021-06-05 07:57:44,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.7515078407720144) internal successors, (6843), 2487 states have internal predecessors, (6843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:44,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6843 transitions. [2021-06-05 07:57:44,071 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6843 transitions. Word has length 75 [2021-06-05 07:57:44,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:44,071 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6843 transitions. [2021-06-05 07:57:44,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.4375) internal successors, (103), 16 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) [2021-06-05 07:57:44,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6843 transitions. [2021-06-05 07:57:44,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:44,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:44,075 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] [2021-06-05 07:57:44,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 07:57:44,297 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:44,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:44,297 INFO L82 PathProgramCache]: Analyzing trace with hash -137824918, now seen corresponding path program 33 times [2021-06-05 07:57:44,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:44,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019737453] [2021-06-05 07:57:44,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:44,393 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:44,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:44,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019737453] [2021-06-05 07:57:44,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019737453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:44,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137531077] [2021-06-05 07:57:44,394 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 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 [2021-06-05 07:57:44,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 07:57:44,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:44,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 07:57:44,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:44,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137531077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:44,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:44,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 07:57:44,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498852310] [2021-06-05 07:57:44,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:57:44,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:44,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:57:44,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:57:44,573 INFO L87 Difference]: Start difference. First operand 2488 states and 6843 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:44,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:44,740 INFO L93 Difference]: Finished difference Result 3441 states and 8877 transitions. [2021-06-05 07:57:44,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:57:44,740 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:57:44,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:44,744 INFO L225 Difference]: With dead ends: 3441 [2021-06-05 07:57:44,745 INFO L226 Difference]: Without dead ends: 3156 [2021-06-05 07:57:44,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 155.3ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:57:44,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3156 states. [2021-06-05 07:57:44,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3156 to 2468. [2021-06-05 07:57:44,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2468 states, 2467 states have (on average 2.7576003242805025) internal successors, (6803), 2467 states have internal predecessors, (6803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:44,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 6803 transitions. [2021-06-05 07:57:44,772 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 6803 transitions. Word has length 75 [2021-06-05 07:57:44,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:44,772 INFO L482 AbstractCegarLoop]: Abstraction has 2468 states and 6803 transitions. [2021-06-05 07:57:44,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:44,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 6803 transitions. [2021-06-05 07:57:44,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:44,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:44,774 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] [2021-06-05 07:57:44,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 07:57:44,975 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:44,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:44,975 INFO L82 PathProgramCache]: Analyzing trace with hash -510245734, now seen corresponding path program 34 times [2021-06-05 07:57:44,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:44,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154859291] [2021-06-05 07:57:44,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:45,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:45,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154859291] [2021-06-05 07:57:45,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154859291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:45,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114397841] [2021-06-05 07:57:45,082 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 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 [2021-06-05 07:57:45,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:57:45,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:45,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 07:57:45,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:45,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114397841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:45,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:45,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 07:57:45,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319135859] [2021-06-05 07:57:45,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:57:45,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:45,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:57:45,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:57:45,280 INFO L87 Difference]: Start difference. First operand 2468 states and 6803 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 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) [2021-06-05 07:57:45,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:45,520 INFO L93 Difference]: Finished difference Result 3376 states and 8747 transitions. [2021-06-05 07:57:45,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:57:45,521 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 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 [2021-06-05 07:57:45,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:45,524 INFO L225 Difference]: With dead ends: 3376 [2021-06-05 07:57:45,524 INFO L226 Difference]: Without dead ends: 3091 [2021-06-05 07:57:45,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 230.2ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:57:45,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3091 states. [2021-06-05 07:57:45,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3091 to 2443. [2021-06-05 07:57:45,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2443 states, 2442 states have (on average 2.7653562653562656) internal successors, (6753), 2442 states have internal predecessors, (6753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:45,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 6753 transitions. [2021-06-05 07:57:45,552 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 6753 transitions. Word has length 75 [2021-06-05 07:57:45,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:45,552 INFO L482 AbstractCegarLoop]: Abstraction has 2443 states and 6753 transitions. [2021-06-05 07:57:45,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 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) [2021-06-05 07:57:45,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 6753 transitions. [2021-06-05 07:57:45,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:45,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:45,556 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] [2021-06-05 07:57:45,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 07:57:45,761 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:45,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:45,761 INFO L82 PathProgramCache]: Analyzing trace with hash -328434196, now seen corresponding path program 35 times [2021-06-05 07:57:45,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:45,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993774473] [2021-06-05 07:57:45,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:45,852 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:45,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:45,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993774473] [2021-06-05 07:57:45,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993774473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:45,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851482897] [2021-06-05 07:57:45,853 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 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 [2021-06-05 07:57:45,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:57:45,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:45,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 07:57:45,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:46,078 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:46,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851482897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:46,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:46,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 07:57:46,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487716036] [2021-06-05 07:57:46,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:57:46,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:46,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:57:46,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:57:46,079 INFO L87 Difference]: Start difference. First operand 2443 states and 6753 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:46,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:46,291 INFO L93 Difference]: Finished difference Result 3301 states and 8597 transitions. [2021-06-05 07:57:46,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:57:46,291 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:57:46,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:46,295 INFO L225 Difference]: With dead ends: 3301 [2021-06-05 07:57:46,295 INFO L226 Difference]: Without dead ends: 3016 [2021-06-05 07:57:46,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 191.9ms TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:57:46,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2021-06-05 07:57:46,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 2418. [2021-06-05 07:57:46,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.7732726520479933) internal successors, (6703), 2417 states have internal predecessors, (6703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:46,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 6703 transitions. [2021-06-05 07:57:46,335 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 6703 transitions. Word has length 75 [2021-06-05 07:57:46,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:46,335 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 6703 transitions. [2021-06-05 07:57:46,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:46,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 6703 transitions. [2021-06-05 07:57:46,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:46,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:46,339 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] [2021-06-05 07:57:46,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 07:57:46,553 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:46,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:46,553 INFO L82 PathProgramCache]: Analyzing trace with hash -24508132, now seen corresponding path program 36 times [2021-06-05 07:57:46,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:46,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475893137] [2021-06-05 07:57:46,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:46,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:46,650 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:46,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:46,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475893137] [2021-06-05 07:57:46,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475893137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:46,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984645543] [2021-06-05 07:57:46,651 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 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 [2021-06-05 07:57:46,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:57:46,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:46,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 07:57:46,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:46,828 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:46,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984645543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:46,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:46,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 07:57:46,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030973210] [2021-06-05 07:57:46,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:57:46,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:46,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:57:46,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:57:46,829 INFO L87 Difference]: Start difference. First operand 2418 states and 6703 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 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) [2021-06-05 07:57:47,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:47,103 INFO L93 Difference]: Finished difference Result 3226 states and 8447 transitions. [2021-06-05 07:57:47,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:57:47,104 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 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 [2021-06-05 07:57:47,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:47,106 INFO L225 Difference]: With dead ends: 3226 [2021-06-05 07:57:47,107 INFO L226 Difference]: Without dead ends: 2941 [2021-06-05 07:57:47,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 253.5ms TimeCoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2021-06-05 07:57:47,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2941 states. [2021-06-05 07:57:47,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2941 to 2393. [2021-06-05 07:57:47,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2393 states, 2392 states have (on average 2.7813545150501673) internal successors, (6653), 2392 states have internal predecessors, (6653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:47,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2393 states to 2393 states and 6653 transitions. [2021-06-05 07:57:47,128 INFO L78 Accepts]: Start accepts. Automaton has 2393 states and 6653 transitions. Word has length 75 [2021-06-05 07:57:47,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:47,128 INFO L482 AbstractCegarLoop]: Abstraction has 2393 states and 6653 transitions. [2021-06-05 07:57:47,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 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) [2021-06-05 07:57:47,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2393 states and 6653 transitions. [2021-06-05 07:57:47,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:47,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:47,130 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] [2021-06-05 07:57:47,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:47,333 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:47,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:47,333 INFO L82 PathProgramCache]: Analyzing trace with hash -670670610, now seen corresponding path program 37 times [2021-06-05 07:57:47,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:47,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76547317] [2021-06-05 07:57:47,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:47,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:47,414 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:47,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:47,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76547317] [2021-06-05 07:57:47,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76547317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:47,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127715615] [2021-06-05 07:57:47,414 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 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 [2021-06-05 07:57:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:47,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 07:57:47,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:47,581 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:47,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127715615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:47,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:47,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 07:57:47,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080477477] [2021-06-05 07:57:47,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:57:47,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:47,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:57:47,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:57:47,583 INFO L87 Difference]: Start difference. First operand 2393 states and 6653 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:47,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:47,802 INFO L93 Difference]: Finished difference Result 3151 states and 8297 transitions. [2021-06-05 07:57:47,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:57:47,802 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:57:47,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:47,805 INFO L225 Difference]: With dead ends: 3151 [2021-06-05 07:57:47,805 INFO L226 Difference]: Without dead ends: 2866 [2021-06-05 07:57:47,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 191.1ms TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:57:47,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2866 states. [2021-06-05 07:57:47,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2866 to 2368. [2021-06-05 07:57:47,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 2.7896070975918885) internal successors, (6603), 2367 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) [2021-06-05 07:57:47,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 6603 transitions. [2021-06-05 07:57:47,829 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 6603 transitions. Word has length 75 [2021-06-05 07:57:47,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:47,829 INFO L482 AbstractCegarLoop]: Abstraction has 2368 states and 6603 transitions. [2021-06-05 07:57:47,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:47,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 6603 transitions. [2021-06-05 07:57:47,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:47,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:47,831 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] [2021-06-05 07:57:48,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 07:57:48,031 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:48,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:48,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1917790238, now seen corresponding path program 38 times [2021-06-05 07:57:48,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:48,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91622560] [2021-06-05 07:57:48,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:48,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:48,119 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:48,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:48,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91622560] [2021-06-05 07:57:48,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91622560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:48,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563761695] [2021-06-05 07:57:48,120 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 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 [2021-06-05 07:57:48,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:57:48,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:48,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 07:57:48,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:48,323 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:57:48,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563761695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:48,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:48,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 07:57:48,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573602508] [2021-06-05 07:57:48,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:57:48,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:48,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:57:48,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:57:48,324 INFO L87 Difference]: Start difference. First operand 2368 states and 6603 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 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) [2021-06-05 07:57:48,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:48,632 INFO L93 Difference]: Finished difference Result 3076 states and 8147 transitions. [2021-06-05 07:57:48,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:57:48,633 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 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 [2021-06-05 07:57:48,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:48,636 INFO L225 Difference]: With dead ends: 3076 [2021-06-05 07:57:48,636 INFO L226 Difference]: Without dead ends: 2791 [2021-06-05 07:57:48,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 277.8ms TimeCoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:57:48,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-06-05 07:57:48,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2343. [2021-06-05 07:57:48,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 2.7980358667805296) internal successors, (6553), 2342 states have internal predecessors, (6553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:48,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 6553 transitions. [2021-06-05 07:57:48,661 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 6553 transitions. Word has length 75 [2021-06-05 07:57:48,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:48,661 INFO L482 AbstractCegarLoop]: Abstraction has 2343 states and 6553 transitions. [2021-06-05 07:57:48,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 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) [2021-06-05 07:57:48,661 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 6553 transitions. [2021-06-05 07:57:48,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 07:57:48,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:48,663 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] [2021-06-05 07:57:48,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:48,863 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:48,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:48,864 INFO L82 PathProgramCache]: Analyzing trace with hash 2118606207, now seen corresponding path program 39 times [2021-06-05 07:57:48,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:48,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872023502] [2021-06-05 07:57:48,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:48,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:48,946 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:48,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:48,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872023502] [2021-06-05 07:57:48,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872023502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:48,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575711771] [2021-06-05 07:57:48,946 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 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 [2021-06-05 07:57:49,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 07:57:49,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:49,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:49,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:49,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575711771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:49,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:49,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 07:57:49,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563741728] [2021-06-05 07:57:49,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:57:49,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:49,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:57:49,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:49,100 INFO L87 Difference]: Start difference. First operand 2343 states and 6553 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) [2021-06-05 07:57:49,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:49,451 INFO L93 Difference]: Finished difference Result 3365 states and 9139 transitions. [2021-06-05 07:57:49,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:57:49,451 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 [2021-06-05 07:57:49,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:49,454 INFO L225 Difference]: With dead ends: 3365 [2021-06-05 07:57:49,454 INFO L226 Difference]: Without dead ends: 2756 [2021-06-05 07:57:49,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 309.6ms TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:57:49,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2021-06-05 07:57:49,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 1634. [2021-06-05 07:57:49,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 2.7348438456827924) internal successors, (4466), 1633 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:49,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 4466 transitions. [2021-06-05 07:57:49,475 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 4466 transitions. Word has length 75 [2021-06-05 07:57:49,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:49,475 INFO L482 AbstractCegarLoop]: Abstraction has 1634 states and 4466 transitions. [2021-06-05 07:57:49,475 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) [2021-06-05 07:57:49,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 4466 transitions. [2021-06-05 07:57:49,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:49,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:49,476 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] [2021-06-05 07:57:49,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:49,677 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:49,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:49,677 INFO L82 PathProgramCache]: Analyzing trace with hash 452139800, now seen corresponding path program 40 times [2021-06-05 07:57:49,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:49,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212497928] [2021-06-05 07:57:49,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:49,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:49,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212497928] [2021-06-05 07:57:49,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212497928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:49,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422128630] [2021-06-05 07:57:49,798 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 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 [2021-06-05 07:57:49,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:57:49,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:49,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:57:49,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:50,032 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:50,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422128630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:50,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:50,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 07:57:50,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450793100] [2021-06-05 07:57:50,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:57:50,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:50,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:57:50,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:57:50,033 INFO L87 Difference]: Start difference. First operand 1634 states and 4466 transitions. Second operand has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 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) [2021-06-05 07:57:50,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:50,324 INFO L93 Difference]: Finished difference Result 2524 states and 6566 transitions. [2021-06-05 07:57:50,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:57:50,324 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 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 80 [2021-06-05 07:57:50,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:50,326 INFO L225 Difference]: With dead ends: 2524 [2021-06-05 07:57:50,326 INFO L226 Difference]: Without dead ends: 2190 [2021-06-05 07:57:50,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 299.7ms TimeCoverageRelationStatistics Valid=285, Invalid=837, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:57:50,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2190 states. [2021-06-05 07:57:50,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2190 to 1719. [2021-06-05 07:57:50,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 2.6984866123399303) internal successors, (4636), 1718 states have internal predecessors, (4636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:50,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 4636 transitions. [2021-06-05 07:57:50,342 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 4636 transitions. Word has length 80 [2021-06-05 07:57:50,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:50,342 INFO L482 AbstractCegarLoop]: Abstraction has 1719 states and 4636 transitions. [2021-06-05 07:57:50,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 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) [2021-06-05 07:57:50,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 4636 transitions. [2021-06-05 07:57:50,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:50,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:50,344 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] [2021-06-05 07:57:50,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 07:57:50,549 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:50,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:50,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1173866716, now seen corresponding path program 41 times [2021-06-05 07:57:50,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:50,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466188389] [2021-06-05 07:57:50,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:50,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:50,680 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:50,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:50,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466188389] [2021-06-05 07:57:50,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466188389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:50,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269775580] [2021-06-05 07:57:50,681 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 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 [2021-06-05 07:57:50,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:57:50,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:50,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:50,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:50,853 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:50,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269775580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:50,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:50,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 07:57:50,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115002729] [2021-06-05 07:57:50,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:57:50,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:50,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:57:50,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:50,854 INFO L87 Difference]: Start difference. First operand 1719 states and 4636 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:51,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:51,036 INFO L93 Difference]: Finished difference Result 2946 states and 7347 transitions. [2021-06-05 07:57:51,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:57:51,037 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:57:51,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:51,039 INFO L225 Difference]: With dead ends: 2946 [2021-06-05 07:57:51,039 INFO L226 Difference]: Without dead ends: 2676 [2021-06-05 07:57:51,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 199.7ms TimeCoverageRelationStatistics Valid=196, Invalid=560, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:57:51,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-06-05 07:57:51,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 1863. [2021-06-05 07:57:51,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 2.71374865735768) internal successors, (5053), 1862 states have internal predecessors, (5053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:51,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 5053 transitions. [2021-06-05 07:57:51,059 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 5053 transitions. Word has length 80 [2021-06-05 07:57:51,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:51,059 INFO L482 AbstractCegarLoop]: Abstraction has 1863 states and 5053 transitions. [2021-06-05 07:57:51,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:51,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 5053 transitions. [2021-06-05 07:57:51,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:51,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:51,061 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] [2021-06-05 07:57:51,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:51,261 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:51,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:51,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1794345044, now seen corresponding path program 42 times [2021-06-05 07:57:51,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:51,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381168727] [2021-06-05 07:57:51,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:51,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:51,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381168727] [2021-06-05 07:57:51,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381168727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:51,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797194550] [2021-06-05 07:57:51,378 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 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 [2021-06-05 07:57:51,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:57:51,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:51,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:51,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:51,584 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:51,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797194550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:51,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:51,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 07:57:51,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492865559] [2021-06-05 07:57:51,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:57:51,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:51,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:57:51,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:57:51,585 INFO L87 Difference]: Start difference. First operand 1863 states and 5053 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) [2021-06-05 07:57:51,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:51,842 INFO L93 Difference]: Finished difference Result 2906 states and 7342 transitions. [2021-06-05 07:57:51,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:57:51,842 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 [2021-06-05 07:57:51,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:51,845 INFO L225 Difference]: With dead ends: 2906 [2021-06-05 07:57:51,845 INFO L226 Difference]: Without dead ends: 2636 [2021-06-05 07:57:51,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 263.8ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:57:51,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2021-06-05 07:57:51,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 1938. [2021-06-05 07:57:51,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1937 states have (on average 2.7248322147651005) internal successors, (5278), 1937 states have internal predecessors, (5278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:51,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 5278 transitions. [2021-06-05 07:57:51,866 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 5278 transitions. Word has length 80 [2021-06-05 07:57:51,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:51,866 INFO L482 AbstractCegarLoop]: Abstraction has 1938 states and 5278 transitions. [2021-06-05 07:57:51,866 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) [2021-06-05 07:57:51,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 5278 transitions. [2021-06-05 07:57:51,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:51,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:51,868 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] [2021-06-05 07:57:52,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 07:57:52,073 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:52,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:52,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1340128870, now seen corresponding path program 43 times [2021-06-05 07:57:52,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:52,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512800794] [2021-06-05 07:57:52,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:52,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:52,186 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:52,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:52,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512800794] [2021-06-05 07:57:52,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512800794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:52,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592485327] [2021-06-05 07:57:52,186 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 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 [2021-06-05 07:57:52,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:52,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:52,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:52,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592485327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:52,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:52,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 07:57:52,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688961276] [2021-06-05 07:57:52,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:57:52,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:52,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:57:52,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:52,393 INFO L87 Difference]: Start difference. First operand 1938 states and 5278 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:52,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:52,628 INFO L93 Difference]: Finished difference Result 2956 states and 7517 transitions. [2021-06-05 07:57:52,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:57:52,628 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:57:52,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:52,631 INFO L225 Difference]: With dead ends: 2956 [2021-06-05 07:57:52,631 INFO L226 Difference]: Without dead ends: 2686 [2021-06-05 07:57:52,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 236.2ms TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-06-05 07:57:52,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-06-05 07:57:52,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 2013. [2021-06-05 07:57:52,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2013 states, 2012 states have (on average 2.735089463220676) internal successors, (5503), 2012 states have internal predecessors, (5503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:52,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 5503 transitions. [2021-06-05 07:57:52,653 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 5503 transitions. Word has length 80 [2021-06-05 07:57:52,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:52,654 INFO L482 AbstractCegarLoop]: Abstraction has 2013 states and 5503 transitions. [2021-06-05 07:57:52,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:52,654 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 5503 transitions. [2021-06-05 07:57:52,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:52,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:52,655 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] [2021-06-05 07:57:52,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:52,856 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:52,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:52,856 INFO L82 PathProgramCache]: Analyzing trace with hash -341232534, now seen corresponding path program 44 times [2021-06-05 07:57:52,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:52,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141740351] [2021-06-05 07:57:52,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:52,985 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:52,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:52,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141740351] [2021-06-05 07:57:52,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141740351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:52,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527081604] [2021-06-05 07:57:52,986 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 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 [2021-06-05 07:57:53,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:57:53,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:53,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:53,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:53,164 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:53,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527081604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:53,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:53,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 07:57:53,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466441361] [2021-06-05 07:57:53,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:57:53,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:53,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:57:53,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:57:53,166 INFO L87 Difference]: Start difference. First operand 2013 states and 5503 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) [2021-06-05 07:57:53,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:53,499 INFO L93 Difference]: Finished difference Result 2981 states and 7642 transitions. [2021-06-05 07:57:53,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:57:53,500 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 [2021-06-05 07:57:53,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:53,503 INFO L225 Difference]: With dead ends: 2981 [2021-06-05 07:57:53,504 INFO L226 Difference]: Without dead ends: 2711 [2021-06-05 07:57:53,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 321.3ms TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:57:53,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-06-05 07:57:53,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 2088. [2021-06-05 07:57:53,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2088 states, 2087 states have (on average 2.744609487302348) internal successors, (5728), 2087 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:53,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 5728 transitions. [2021-06-05 07:57:53,533 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 5728 transitions. Word has length 80 [2021-06-05 07:57:53,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:53,533 INFO L482 AbstractCegarLoop]: Abstraction has 2088 states and 5728 transitions. [2021-06-05 07:57:53,533 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) [2021-06-05 07:57:53,533 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 5728 transitions. [2021-06-05 07:57:53,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:53,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:53,535 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] [2021-06-05 07:57:53,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 07:57:53,739 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:53,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:53,739 INFO L82 PathProgramCache]: Analyzing trace with hash 2074406872, now seen corresponding path program 45 times [2021-06-05 07:57:53,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:53,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351738877] [2021-06-05 07:57:53,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:53,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:53,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351738877] [2021-06-05 07:57:53,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351738877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:53,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564116030] [2021-06-05 07:57:53,851 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 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 [2021-06-05 07:57:53,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:57:53,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:53,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:57:53,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:54,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564116030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:54,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:54,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 07:57:54,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598715381] [2021-06-05 07:57:54,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:57:54,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:54,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:57:54,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:54,036 INFO L87 Difference]: Start difference. First operand 2088 states and 5728 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:54,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:54,281 INFO L93 Difference]: Finished difference Result 3006 states and 7767 transitions. [2021-06-05 07:57:54,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:57:54,282 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:57:54,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:54,284 INFO L225 Difference]: With dead ends: 3006 [2021-06-05 07:57:54,285 INFO L226 Difference]: Without dead ends: 2736 [2021-06-05 07:57:54,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 239.6ms TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:57:54,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-06-05 07:57:54,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2163. [2021-06-05 07:57:54,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 2.7534690101757633) internal successors, (5953), 2162 states have internal predecessors, (5953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:54,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 5953 transitions. [2021-06-05 07:57:54,306 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 5953 transitions. Word has length 80 [2021-06-05 07:57:54,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:54,306 INFO L482 AbstractCegarLoop]: Abstraction has 2163 states and 5953 transitions. [2021-06-05 07:57:54,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:54,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 5953 transitions. [2021-06-05 07:57:54,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:54,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:54,308 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] [2021-06-05 07:57:54,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 07:57:54,509 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:54,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:54,509 INFO L82 PathProgramCache]: Analyzing trace with hash -190241112, now seen corresponding path program 46 times [2021-06-05 07:57:54,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:54,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117200879] [2021-06-05 07:57:54,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:54,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:54,621 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:54,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:54,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117200879] [2021-06-05 07:57:54,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117200879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:54,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958961518] [2021-06-05 07:57:54,621 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 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 [2021-06-05 07:57:54,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:57:54,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:54,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:54,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:54,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958961518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:54,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:54,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 07:57:54,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504606567] [2021-06-05 07:57:54,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:57:54,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:54,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:57:54,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:57:54,800 INFO L87 Difference]: Start difference. First operand 2163 states and 5953 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) [2021-06-05 07:57:55,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:55,175 INFO L93 Difference]: Finished difference Result 3031 states and 7892 transitions. [2021-06-05 07:57:55,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:57:55,176 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 [2021-06-05 07:57:55,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:55,179 INFO L225 Difference]: With dead ends: 3031 [2021-06-05 07:57:55,179 INFO L226 Difference]: Without dead ends: 2761 [2021-06-05 07:57:55,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 336.0ms TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:57:55,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2761 states. [2021-06-05 07:57:55,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 2238. [2021-06-05 07:57:55,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2238 states, 2237 states have (on average 2.761734465802414) internal successors, (6178), 2237 states have internal predecessors, (6178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:55,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 6178 transitions. [2021-06-05 07:57:55,203 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 6178 transitions. Word has length 80 [2021-06-05 07:57:55,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:55,203 INFO L482 AbstractCegarLoop]: Abstraction has 2238 states and 6178 transitions. [2021-06-05 07:57:55,203 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) [2021-06-05 07:57:55,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 6178 transitions. [2021-06-05 07:57:55,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:55,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:55,205 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] [2021-06-05 07:57:55,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 07:57:55,406 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:55,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:55,406 INFO L82 PathProgramCache]: Analyzing trace with hash 423998358, now seen corresponding path program 47 times [2021-06-05 07:57:55,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:55,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451636772] [2021-06-05 07:57:55,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:55,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:55,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:55,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451636772] [2021-06-05 07:57:55,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451636772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:55,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673978435] [2021-06-05 07:57:55,511 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 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 [2021-06-05 07:57:55,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:57:55,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:55,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:55,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:55,705 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:55,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673978435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:55,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:55,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 07:57:55,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160306118] [2021-06-05 07:57:55,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:57:55,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:55,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:57:55,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:55,706 INFO L87 Difference]: Start difference. First operand 2238 states and 6178 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:56,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:56,008 INFO L93 Difference]: Finished difference Result 3056 states and 8017 transitions. [2021-06-05 07:57:56,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:57:56,008 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:57:56,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:56,011 INFO L225 Difference]: With dead ends: 3056 [2021-06-05 07:57:56,011 INFO L226 Difference]: Without dead ends: 2786 [2021-06-05 07:57:56,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 270.4ms TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:57:56,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-06-05 07:57:56,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 2313. [2021-06-05 07:57:56,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2312 states have (on average 2.769463667820069) internal successors, (6403), 2312 states have internal predecessors, (6403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:56,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 6403 transitions. [2021-06-05 07:57:56,036 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 6403 transitions. Word has length 80 [2021-06-05 07:57:56,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:56,037 INFO L482 AbstractCegarLoop]: Abstraction has 2313 states and 6403 transitions. [2021-06-05 07:57:56,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:56,037 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 6403 transitions. [2021-06-05 07:57:56,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:56,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:56,038 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] [2021-06-05 07:57:56,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 07:57:56,239 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:56,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:56,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1291243930, now seen corresponding path program 48 times [2021-06-05 07:57:56,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:56,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054328677] [2021-06-05 07:57:56,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:56,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:56,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054328677] [2021-06-05 07:57:56,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054328677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:56,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971063892] [2021-06-05 07:57:56,348 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 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 [2021-06-05 07:57:56,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:57:56,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:56,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:57:56,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:56,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971063892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:56,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:56,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 07:57:56,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939419312] [2021-06-05 07:57:56,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:57:56,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:56,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:57:56,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:57:56,546 INFO L87 Difference]: Start difference. First operand 2313 states and 6403 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) [2021-06-05 07:57:56,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:56,974 INFO L93 Difference]: Finished difference Result 3141 states and 8307 transitions. [2021-06-05 07:57:56,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:57:56,975 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 [2021-06-05 07:57:56,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:56,978 INFO L225 Difference]: With dead ends: 3141 [2021-06-05 07:57:56,978 INFO L226 Difference]: Without dead ends: 2871 [2021-06-05 07:57:56,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 382.3ms TimeCoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:57:56,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2021-06-05 07:57:57,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2388. [2021-06-05 07:57:57,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 2.785085881860075) internal successors, (6648), 2387 states have internal predecessors, (6648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:57,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6648 transitions. [2021-06-05 07:57:57,011 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6648 transitions. Word has length 80 [2021-06-05 07:57:57,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:57,011 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6648 transitions. [2021-06-05 07:57:57,012 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) [2021-06-05 07:57:57,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6648 transitions. [2021-06-05 07:57:57,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:57,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:57,013 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] [2021-06-05 07:57:57,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:57,214 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:57,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:57,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1971075764, now seen corresponding path program 49 times [2021-06-05 07:57:57,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:57,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718372068] [2021-06-05 07:57:57,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:57,309 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:57,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:57,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718372068] [2021-06-05 07:57:57,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718372068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:57,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859248578] [2021-06-05 07:57:57,310 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 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 [2021-06-05 07:57:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:57,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:57:57,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:57,466 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:57,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859248578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:57,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:57,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 07:57:57,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812997055] [2021-06-05 07:57:57,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:57:57,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:57,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:57:57,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:57:57,467 INFO L87 Difference]: Start difference. First operand 2388 states and 6648 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:57,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:57,791 INFO L93 Difference]: Finished difference Result 3908 states and 10481 transitions. [2021-06-05 07:57:57,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:57:57,791 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:57:57,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:57,795 INFO L225 Difference]: With dead ends: 3908 [2021-06-05 07:57:57,795 INFO L226 Difference]: Without dead ends: 3638 [2021-06-05 07:57:57,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 285.3ms TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:57:57,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3638 states. [2021-06-05 07:57:57,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3638 to 2568. [2021-06-05 07:57:57,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 2.8075574600701207) internal successors, (7207), 2567 states have internal predecessors, (7207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:57,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 7207 transitions. [2021-06-05 07:57:57,822 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 7207 transitions. Word has length 80 [2021-06-05 07:57:57,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:57,822 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 7207 transitions. [2021-06-05 07:57:57,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:57,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 7207 transitions. [2021-06-05 07:57:57,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 07:57:57,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:57,824 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] [2021-06-05 07:57:58,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 07:57:58,025 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:58,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:58,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1993419014, now seen corresponding path program 50 times [2021-06-05 07:57:58,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:58,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514870642] [2021-06-05 07:57:58,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:58,133 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:58,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:58,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514870642] [2021-06-05 07:57:58,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514870642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:58,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060853146] [2021-06-05 07:57:58,133 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 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 [2021-06-05 07:57:58,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:57:58,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:58,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:57:58,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:58,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060853146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:58,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:58,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 07:57:58,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775840693] [2021-06-05 07:57:58,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:57:58,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:58,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:57:58,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:57:58,329 INFO L87 Difference]: Start difference. First operand 2568 states and 7207 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) [2021-06-05 07:57:58,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:58,822 INFO L93 Difference]: Finished difference Result 3851 states and 10341 transitions. [2021-06-05 07:57:58,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:57:58,822 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 [2021-06-05 07:57:58,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:58,827 INFO L225 Difference]: With dead ends: 3851 [2021-06-05 07:57:58,827 INFO L226 Difference]: Without dead ends: 3276 [2021-06-05 07:57:58,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 439.0ms TimeCoverageRelationStatistics Valid=405, Invalid=1317, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:57:58,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-06-05 07:57:58,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2603. [2021-06-05 07:57:58,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:58,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 07:57:58,878 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 80 [2021-06-05 07:57:58,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:58,879 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 07:57:58,879 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) [2021-06-05 07:57:58,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 07:57:58,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 07:57:58,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:58,881 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] [2021-06-05 07:57:59,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:59,081 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:59,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:59,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1150498713, now seen corresponding path program 51 times [2021-06-05 07:57:59,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:59,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924266226] [2021-06-05 07:57:59,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:59,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:57:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:59,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:57:59,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924266226] [2021-06-05 07:57:59,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924266226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:59,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799877696] [2021-06-05 07:57:59,210 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 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 [2021-06-05 07:57:59,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:57:59,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:57:59,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:57:59,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:57:59,414 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:57:59,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799877696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:57:59,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:57:59,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 07:57:59,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872043858] [2021-06-05 07:57:59,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:57:59,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:57:59,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:57:59,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:57:59,415 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 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) [2021-06-05 07:57:59,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:57:59,657 INFO L93 Difference]: Finished difference Result 3446 states and 9097 transitions. [2021-06-05 07:57:59,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:57:59,658 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 [2021-06-05 07:57:59,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:57:59,661 INFO L225 Difference]: With dead ends: 3446 [2021-06-05 07:57:59,661 INFO L226 Difference]: Without dead ends: 3176 [2021-06-05 07:57:59,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 257.1ms TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:57:59,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-05 07:57:59,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2603. [2021-06-05 07:57:59,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:57:59,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 07:57:59,690 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-05 07:57:59,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:57:59,691 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 07:57:59,691 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) [2021-06-05 07:57:59,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 07:57:59,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 07:57:59,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:57:59,693 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] [2021-06-05 07:57:59,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:57:59,895 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:57:59,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:57:59,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1817713047, now seen corresponding path program 52 times [2021-06-05 07:57:59,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:57:59,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063450798] [2021-06-05 07:57:59,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:57:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:00,031 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:00,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:00,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063450798] [2021-06-05 07:58:00,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063450798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:00,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027830649] [2021-06-05 07:58:00,031 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 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 [2021-06-05 07:58:00,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:58:00,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:00,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:58:00,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:00,248 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:00,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027830649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:00,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:00,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 07:58:00,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936038713] [2021-06-05 07:58:00,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:58:00,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:00,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:58:00,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:58:00,250 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 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) [2021-06-05 07:58:00,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:00,583 INFO L93 Difference]: Finished difference Result 3641 states and 9487 transitions. [2021-06-05 07:58:00,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:58:00,584 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 [2021-06-05 07:58:00,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:00,588 INFO L225 Difference]: With dead ends: 3641 [2021-06-05 07:58:00,588 INFO L226 Difference]: Without dead ends: 3371 [2021-06-05 07:58:00,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 344.7ms TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:58:00,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3371 states. [2021-06-05 07:58:00,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3371 to 2603. [2021-06-05 07:58:00,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:00,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 07:58:00,625 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-05 07:58:00,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:00,625 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 07:58:00,625 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) [2021-06-05 07:58:00,625 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 07:58:00,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 07:58:00,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:00,628 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] [2021-06-05 07:58:00,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:00,833 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:00,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:00,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1363496873, now seen corresponding path program 53 times [2021-06-05 07:58:00,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:00,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24093817] [2021-06-05 07:58:00,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:00,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:00,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24093817] [2021-06-05 07:58:00,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24093817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:00,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578881710] [2021-06-05 07:58:00,973 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 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 [2021-06-05 07:58:01,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:58:01,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:01,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:58:01,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:01,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578881710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:01,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:01,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 07:58:01,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564128817] [2021-06-05 07:58:01,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:58:01,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:01,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:58:01,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:58:01,161 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 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) [2021-06-05 07:58:01,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:01,426 INFO L93 Difference]: Finished difference Result 3596 states and 9397 transitions. [2021-06-05 07:58:01,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:58:01,426 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 [2021-06-05 07:58:01,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:01,429 INFO L225 Difference]: With dead ends: 3596 [2021-06-05 07:58:01,429 INFO L226 Difference]: Without dead ends: 3326 [2021-06-05 07:58:01,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 276.7ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:58:01,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2021-06-05 07:58:01,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 2603. [2021-06-05 07:58:01,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:01,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 07:58:01,454 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-05 07:58:01,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:01,454 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 07:58:01,454 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) [2021-06-05 07:58:01,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 07:58:01,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 07:58:01,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:01,457 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] [2021-06-05 07:58:01,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:01,657 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:01,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:01,657 INFO L82 PathProgramCache]: Analyzing trace with hash -364600537, now seen corresponding path program 54 times [2021-06-05 07:58:01,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:01,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422913876] [2021-06-05 07:58:01,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:01,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:01,772 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:01,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:01,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422913876] [2021-06-05 07:58:01,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422913876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:01,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808985124] [2021-06-05 07:58:01,773 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 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 [2021-06-05 07:58:01,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:58:01,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:01,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:58:01,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:01,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808985124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:01,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:01,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 07:58:01,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756907982] [2021-06-05 07:58:01,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:58:01,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:01,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:58:01,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:58:01,963 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 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) [2021-06-05 07:58:02,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:02,303 INFO L93 Difference]: Finished difference Result 3546 states and 9297 transitions. [2021-06-05 07:58:02,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:58:02,303 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 [2021-06-05 07:58:02,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:02,307 INFO L225 Difference]: With dead ends: 3546 [2021-06-05 07:58:02,307 INFO L226 Difference]: Without dead ends: 3276 [2021-06-05 07:58:02,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 336.8ms TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 07:58:02,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-06-05 07:58:02,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2603. [2021-06-05 07:58:02,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:02,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 07:58:02,331 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-05 07:58:02,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:02,331 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 07:58:02,331 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) [2021-06-05 07:58:02,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 07:58:02,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 07:58:02,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:02,333 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] [2021-06-05 07:58:02,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 07:58:02,533 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:02,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:02,534 INFO L82 PathProgramCache]: Analyzing trace with hash 2051038869, now seen corresponding path program 55 times [2021-06-05 07:58:02,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:02,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401057115] [2021-06-05 07:58:02,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:02,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:02,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:02,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401057115] [2021-06-05 07:58:02,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401057115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:02,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306049324] [2021-06-05 07:58:02,636 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 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 [2021-06-05 07:58:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:02,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:58:02,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:02,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306049324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:02,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:02,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 07:58:02,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889991810] [2021-06-05 07:58:02,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:58:02,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:02,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:58:02,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:58:02,804 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 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) [2021-06-05 07:58:03,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:03,124 INFO L93 Difference]: Finished difference Result 3496 states and 9197 transitions. [2021-06-05 07:58:03,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:58:03,124 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 [2021-06-05 07:58:03,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:03,127 INFO L225 Difference]: With dead ends: 3496 [2021-06-05 07:58:03,127 INFO L226 Difference]: Without dead ends: 3226 [2021-06-05 07:58:03,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 305.5ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 07:58:03,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-06-05 07:58:03,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2603. [2021-06-05 07:58:03,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:03,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 07:58:03,152 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-05 07:58:03,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:03,152 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 07:58:03,152 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) [2021-06-05 07:58:03,152 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 07:58:03,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 07:58:03,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:03,154 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] [2021-06-05 07:58:03,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:03,355 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:03,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:03,355 INFO L82 PathProgramCache]: Analyzing trace with hash -213609115, now seen corresponding path program 56 times [2021-06-05 07:58:03,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:03,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29794009] [2021-06-05 07:58:03,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:03,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:03,477 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:03,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:03,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29794009] [2021-06-05 07:58:03,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29794009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:03,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731098291] [2021-06-05 07:58:03,478 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 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 [2021-06-05 07:58:03,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:58:03,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:03,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:58:03,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:03,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731098291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:03,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:03,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 07:58:03,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942927615] [2021-06-05 07:58:03,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:58:03,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:03,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:58:03,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:58:03,699 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 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) [2021-06-05 07:58:04,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:04,115 INFO L93 Difference]: Finished difference Result 3446 states and 9097 transitions. [2021-06-05 07:58:04,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:58:04,116 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 [2021-06-05 07:58:04,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:04,118 INFO L225 Difference]: With dead ends: 3446 [2021-06-05 07:58:04,119 INFO L226 Difference]: Without dead ends: 3176 [2021-06-05 07:58:04,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 406.5ms TimeCoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 07:58:04,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-05 07:58:04,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2603. [2021-06-05 07:58:04,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:04,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 07:58:04,141 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-05 07:58:04,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:04,141 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 07:58:04,141 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) [2021-06-05 07:58:04,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 07:58:04,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 07:58:04,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:04,144 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] [2021-06-05 07:58:04,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 07:58:04,366 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:04,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:04,366 INFO L82 PathProgramCache]: Analyzing trace with hash 400630355, now seen corresponding path program 57 times [2021-06-05 07:58:04,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:04,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567939182] [2021-06-05 07:58:04,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:04,478 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:04,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:04,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567939182] [2021-06-05 07:58:04,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567939182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:04,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78277906] [2021-06-05 07:58:04,478 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 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 [2021-06-05 07:58:04,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:58:04,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:04,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:58:04,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:04,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78277906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:04,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:04,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 07:58:04,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131079961] [2021-06-05 07:58:04,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:58:04,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:04,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:58:04,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:58:04,645 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 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) [2021-06-05 07:58:04,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:04,985 INFO L93 Difference]: Finished difference Result 3396 states and 8997 transitions. [2021-06-05 07:58:04,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:58:04,985 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 [2021-06-05 07:58:04,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:04,988 INFO L225 Difference]: With dead ends: 3396 [2021-06-05 07:58:04,989 INFO L226 Difference]: Without dead ends: 3126 [2021-06-05 07:58:04,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 317.7ms TimeCoverageRelationStatistics Valid=413, Invalid=1147, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 07:58:04,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-06-05 07:58:05,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2603. [2021-06-05 07:58:05,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:05,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 07:58:05,025 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-05 07:58:05,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:05,025 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 07:58:05,026 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) [2021-06-05 07:58:05,026 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 07:58:05,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 07:58:05,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:05,028 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] [2021-06-05 07:58:05,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:05,235 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:05,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:05,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1314611933, now seen corresponding path program 58 times [2021-06-05 07:58:05,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:05,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382244278] [2021-06-05 07:58:05,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:05,402 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:05,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:05,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382244278] [2021-06-05 07:58:05,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382244278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:05,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100053486] [2021-06-05 07:58:05,402 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 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 [2021-06-05 07:58:05,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:58:05,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:05,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:58:05,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:05,578 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:05,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100053486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:05,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:05,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 07:58:05,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818660979] [2021-06-05 07:58:05,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:58:05,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:05,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:58:05,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:58:05,579 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 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) [2021-06-05 07:58:06,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:06,006 INFO L93 Difference]: Finished difference Result 3406 states and 9047 transitions. [2021-06-05 07:58:06,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:58:06,007 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 [2021-06-05 07:58:06,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:06,010 INFO L225 Difference]: With dead ends: 3406 [2021-06-05 07:58:06,010 INFO L226 Difference]: Without dead ends: 3136 [2021-06-05 07:58:06,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 411.4ms TimeCoverageRelationStatistics Valid=440, Invalid=1282, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:58:06,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2021-06-05 07:58:06,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 2603. [2021-06-05 07:58:06,030 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) [2021-06-05 07:58:06,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7288 transitions. [2021-06-05 07:58:06,033 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7288 transitions. Word has length 85 [2021-06-05 07:58:06,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:06,034 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7288 transitions. [2021-06-05 07:58:06,034 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) [2021-06-05 07:58:06,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7288 transitions. [2021-06-05 07:58:06,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 07:58:06,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:06,036 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] [2021-06-05 07:58:06,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:06,236 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:06,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:06,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1947707761, now seen corresponding path program 59 times [2021-06-05 07:58:06,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:06,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798153747] [2021-06-05 07:58:06,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:06,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:06,356 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:06,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:06,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798153747] [2021-06-05 07:58:06,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798153747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:06,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664907848] [2021-06-05 07:58:06,356 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 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 [2021-06-05 07:58:06,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:58:06,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:06,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:58:06,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:06,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664907848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:06,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:06,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 07:58:06,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235808473] [2021-06-05 07:58:06,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:58:06,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:06,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:58:06,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:58:06,547 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) [2021-06-05 07:58:06,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:06,934 INFO L93 Difference]: Finished difference Result 4148 states and 11171 transitions. [2021-06-05 07:58:06,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:58:06,934 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 [2021-06-05 07:58:06,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:06,940 INFO L225 Difference]: With dead ends: 4148 [2021-06-05 07:58:06,940 INFO L226 Difference]: Without dead ends: 3878 [2021-06-05 07:58:06,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 347.6ms TimeCoverageRelationStatistics Valid=489, Invalid=1233, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:58:06,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2021-06-05 07:58:06,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 2783. [2021-06-05 07:58:06,979 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) [2021-06-05 07:58:06,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 7847 transitions. [2021-06-05 07:58:06,983 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 7847 transitions. Word has length 85 [2021-06-05 07:58:06,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:06,984 INFO L482 AbstractCegarLoop]: Abstraction has 2783 states and 7847 transitions. [2021-06-05 07:58:06,984 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) [2021-06-05 07:58:06,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 7847 transitions. [2021-06-05 07:58:06,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 07:58:06,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:06,986 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] [2021-06-05 07:58:07,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:07,206 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:07,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:07,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1970051011, now seen corresponding path program 60 times [2021-06-05 07:58:07,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:07,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801638320] [2021-06-05 07:58:07,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:07,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:07,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:07,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801638320] [2021-06-05 07:58:07,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801638320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:07,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808084981] [2021-06-05 07:58:07,326 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 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 [2021-06-05 07:58:07,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:58:07,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:07,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:58:07,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:07,537 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:07,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808084981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:07,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:07,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 07:58:07,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735653841] [2021-06-05 07:58:07,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:58:07,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:07,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:58:07,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:58:07,539 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) [2021-06-05 07:58:08,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:08,039 INFO L93 Difference]: Finished difference Result 4016 states and 10836 transitions. [2021-06-05 07:58:08,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:58:08,040 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 [2021-06-05 07:58:08,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:08,044 INFO L225 Difference]: With dead ends: 4016 [2021-06-05 07:58:08,044 INFO L226 Difference]: Without dead ends: 3441 [2021-06-05 07:58:08,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 464.4ms TimeCoverageRelationStatistics Valid=521, Invalid=1641, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:58:08,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2021-06-05 07:58:08,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 1924. [2021-06-05 07:58:08,063 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) [2021-06-05 07:58:08,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5256 transitions. [2021-06-05 07:58:08,066 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5256 transitions. Word has length 85 [2021-06-05 07:58:08,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:08,066 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 5256 transitions. [2021-06-05 07:58:08,066 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) [2021-06-05 07:58:08,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5256 transitions. [2021-06-05 07:58:08,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 07:58:08,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:08,068 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] [2021-06-05 07:58:08,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:08,291 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:08,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:08,292 INFO L82 PathProgramCache]: Analyzing trace with hash 834350121, now seen corresponding path program 61 times [2021-06-05 07:58:08,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:08,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170903528] [2021-06-05 07:58:08,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:08,435 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:08,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:08,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170903528] [2021-06-05 07:58:08,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170903528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:08,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861545419] [2021-06-05 07:58:08,436 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 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 [2021-06-05 07:58:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:08,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:58:08,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:08,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861545419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:08,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:08,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 21 [2021-06-05 07:58:08,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673434519] [2021-06-05 07:58:08,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:58:08,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:08,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:58:08,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:58:08,673 INFO L87 Difference]: Start difference. First operand 1924 states and 5256 transitions. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:08,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:08,964 INFO L93 Difference]: Finished difference Result 2864 states and 7456 transitions. [2021-06-05 07:58:08,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:58:08,964 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:58:08,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:08,967 INFO L225 Difference]: With dead ends: 2864 [2021-06-05 07:58:08,967 INFO L226 Difference]: Without dead ends: 2530 [2021-06-05 07:58:08,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 333.4ms TimeCoverageRelationStatistics Valid=386, Invalid=1096, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:58:08,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-06-05 07:58:08,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2009. [2021-06-05 07:58:08,985 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) [2021-06-05 07:58:08,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 5426 transitions. [2021-06-05 07:58:08,987 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 5426 transitions. Word has length 90 [2021-06-05 07:58:08,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:08,987 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 5426 transitions. [2021-06-05 07:58:08,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:08,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 5426 transitions. [2021-06-05 07:58:08,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 07:58:08,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:08,989 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] [2021-06-05 07:58:09,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 07:58:09,191 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:09,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:09,192 INFO L82 PathProgramCache]: Analyzing trace with hash -207325971, now seen corresponding path program 62 times [2021-06-05 07:58:09,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:09,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408958429] [2021-06-05 07:58:09,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:09,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:09,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408958429] [2021-06-05 07:58:09,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408958429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:09,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300255748] [2021-06-05 07:58:09,353 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 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 [2021-06-05 07:58:09,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:58:09,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:09,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:58:09,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:09,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300255748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:09,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:09,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 07:58:09,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138134903] [2021-06-05 07:58:09,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:58:09,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:09,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:58:09,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:58:09,556 INFO L87 Difference]: Start difference. First operand 2009 states and 5426 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) [2021-06-05 07:58:09,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:09,782 INFO L93 Difference]: Finished difference Result 3386 states and 8437 transitions. [2021-06-05 07:58:09,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:58:09,782 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 [2021-06-05 07:58:09,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:09,785 INFO L225 Difference]: With dead ends: 3386 [2021-06-05 07:58:09,785 INFO L226 Difference]: Without dead ends: 3116 [2021-06-05 07:58:09,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 282.7ms TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:58:09,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2021-06-05 07:58:09,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 2153. [2021-06-05 07:58:09,803 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) [2021-06-05 07:58:09,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 5843 transitions. [2021-06-05 07:58:09,806 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 5843 transitions. Word has length 90 [2021-06-05 07:58:09,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:09,806 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 5843 transitions. [2021-06-05 07:58:09,806 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) [2021-06-05 07:58:09,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 5843 transitions. [2021-06-05 07:58:09,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 07:58:09,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:09,808 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] [2021-06-05 07:58:10,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:10,008 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:10,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:10,008 INFO L82 PathProgramCache]: Analyzing trace with hash -452403267, now seen corresponding path program 63 times [2021-06-05 07:58:10,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:10,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439063680] [2021-06-05 07:58:10,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:10,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:10,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:10,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439063680] [2021-06-05 07:58:10,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439063680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:10,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433928565] [2021-06-05 07:58:10,158 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 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 [2021-06-05 07:58:10,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 07:58:10,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:10,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:58:10,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:10,397 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:10,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433928565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:10,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:10,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 07:58:10,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683326912] [2021-06-05 07:58:10,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:58:10,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:10,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:58:10,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:58:10,399 INFO L87 Difference]: Start difference. First operand 2153 states and 5843 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:10,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:10,691 INFO L93 Difference]: Finished difference Result 3346 states and 8432 transitions. [2021-06-05 07:58:10,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:58:10,692 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:58:10,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:10,694 INFO L225 Difference]: With dead ends: 3346 [2021-06-05 07:58:10,694 INFO L226 Difference]: Without dead ends: 3076 [2021-06-05 07:58:10,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 341.9ms TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:58:10,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2021-06-05 07:58:10,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 2228. [2021-06-05 07:58:10,712 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) [2021-06-05 07:58:10,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 6068 transitions. [2021-06-05 07:58:10,715 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 6068 transitions. Word has length 90 [2021-06-05 07:58:10,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:10,715 INFO L482 AbstractCegarLoop]: Abstraction has 2228 states and 6068 transitions. [2021-06-05 07:58:10,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:10,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 6068 transitions. [2021-06-05 07:58:10,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 07:58:10,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:10,717 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] [2021-06-05 07:58:10,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:10,917 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:10,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:10,918 INFO L82 PathProgramCache]: Analyzing trace with hash -829253589, now seen corresponding path program 64 times [2021-06-05 07:58:10,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:10,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546350984] [2021-06-05 07:58:10,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:10,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:11,050 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:11,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:11,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546350984] [2021-06-05 07:58:11,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546350984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:11,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883282334] [2021-06-05 07:58:11,051 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 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 [2021-06-05 07:58:11,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:58:11,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:11,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:58:11,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:11,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883282334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:11,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:11,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 07:58:11,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710527207] [2021-06-05 07:58:11,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:58:11,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:11,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:58:11,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:58:11,285 INFO L87 Difference]: Start difference. First operand 2228 states and 6068 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) [2021-06-05 07:58:11,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:11,539 INFO L93 Difference]: Finished difference Result 3396 states and 8607 transitions. [2021-06-05 07:58:11,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:58:11,539 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 [2021-06-05 07:58:11,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:11,542 INFO L225 Difference]: With dead ends: 3396 [2021-06-05 07:58:11,542 INFO L226 Difference]: Without dead ends: 3126 [2021-06-05 07:58:11,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 277.5ms TimeCoverageRelationStatistics Valid=294, Invalid=896, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:58:11,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-06-05 07:58:11,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2303. [2021-06-05 07:58:11,561 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) [2021-06-05 07:58:11,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 6293 transitions. [2021-06-05 07:58:11,564 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 6293 transitions. Word has length 90 [2021-06-05 07:58:11,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:11,564 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 6293 transitions. [2021-06-05 07:58:11,564 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) [2021-06-05 07:58:11,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 6293 transitions. [2021-06-05 07:58:11,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 07:58:11,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:11,566 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] [2021-06-05 07:58:11,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 07:58:11,767 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:11,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:11,767 INFO L82 PathProgramCache]: Analyzing trace with hash 497501947, now seen corresponding path program 65 times [2021-06-05 07:58:11,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:11,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84708673] [2021-06-05 07:58:11,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:11,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:11,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:11,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84708673] [2021-06-05 07:58:11,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84708673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:11,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524889470] [2021-06-05 07:58:11,896 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 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 [2021-06-05 07:58:11,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 07:58:11,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:11,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:58:11,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:12,103 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:12,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524889470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:12,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:12,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 07:58:12,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594385217] [2021-06-05 07:58:12,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:58:12,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:12,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:58:12,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:58:12,105 INFO L87 Difference]: Start difference. First operand 2303 states and 6293 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:12,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:12,484 INFO L93 Difference]: Finished difference Result 3421 states and 8732 transitions. [2021-06-05 07:58:12,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:58:12,485 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:58:12,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:12,488 INFO L225 Difference]: With dead ends: 3421 [2021-06-05 07:58:12,488 INFO L226 Difference]: Without dead ends: 3151 [2021-06-05 07:58:12,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 384.7ms TimeCoverageRelationStatistics Valid=355, Invalid=1127, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:58:12,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-05 07:58:12,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2378. [2021-06-05 07:58:12,512 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) [2021-06-05 07:58:12,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6518 transitions. [2021-06-05 07:58:12,514 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6518 transitions. Word has length 90 [2021-06-05 07:58:12,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:12,514 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6518 transitions. [2021-06-05 07:58:12,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:12,515 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6518 transitions. [2021-06-05 07:58:12,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 07:58:12,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:12,516 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] [2021-06-05 07:58:12,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:12,717 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:12,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:12,717 INFO L82 PathProgramCache]: Analyzing trace with hash 951718121, now seen corresponding path program 66 times [2021-06-05 07:58:12,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:12,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534894013] [2021-06-05 07:58:12,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:12,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:12,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:12,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534894013] [2021-06-05 07:58:12,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534894013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:12,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354853750] [2021-06-05 07:58:12,833 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 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 [2021-06-05 07:58:12,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 07:58:12,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:12,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:58:12,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:13,022 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:13,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354853750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:13,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:13,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 07:58:13,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557997996] [2021-06-05 07:58:13,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:58:13,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:13,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:58:13,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:58:13,023 INFO L87 Difference]: Start difference. First operand 2378 states and 6518 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) [2021-06-05 07:58:13,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:13,323 INFO L93 Difference]: Finished difference Result 3446 states and 8857 transitions. [2021-06-05 07:58:13,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:58:13,323 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 [2021-06-05 07:58:13,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:13,326 INFO L225 Difference]: With dead ends: 3446 [2021-06-05 07:58:13,326 INFO L226 Difference]: Without dead ends: 3176 [2021-06-05 07:58:13,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 298.9ms TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:58:13,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-05 07:58:13,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2453. [2021-06-05 07:58:13,348 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) [2021-06-05 07:58:13,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 6743 transitions. [2021-06-05 07:58:13,350 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 6743 transitions. Word has length 90 [2021-06-05 07:58:13,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:13,351 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 6743 transitions. [2021-06-05 07:58:13,351 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) [2021-06-05 07:58:13,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 6743 transitions. [2021-06-05 07:58:13,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 07:58:13,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:13,352 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] [2021-06-05 07:58:13,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 07:58:13,553 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:13,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:13,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1950614457, now seen corresponding path program 67 times [2021-06-05 07:58:13,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:13,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946950460] [2021-06-05 07:58:13,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:13,673 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:13,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:13,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946950460] [2021-06-05 07:58:13,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946950460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:13,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840792209] [2021-06-05 07:58:13,674 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 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 [2021-06-05 07:58:13,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:13,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:58:13,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:13,889 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:13,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840792209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:13,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:13,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 07:58:13,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967432024] [2021-06-05 07:58:13,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:58:13,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:13,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:58:13,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:58:13,891 INFO L87 Difference]: Start difference. First operand 2453 states and 6743 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:14,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:14,287 INFO L93 Difference]: Finished difference Result 3471 states and 8982 transitions. [2021-06-05 07:58:14,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:58:14,288 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:58:14,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:14,291 INFO L225 Difference]: With dead ends: 3471 [2021-06-05 07:58:14,291 INFO L226 Difference]: Without dead ends: 3201 [2021-06-05 07:58:14,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 390.3ms TimeCoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:58:14,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2021-06-05 07:58:14,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 2528. [2021-06-05 07:58:14,313 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) [2021-06-05 07:58:14,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 6968 transitions. [2021-06-05 07:58:14,316 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 6968 transitions. Word has length 90 [2021-06-05 07:58:14,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:14,316 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 6968 transitions. [2021-06-05 07:58:14,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:14,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 6968 transitions. [2021-06-05 07:58:14,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 07:58:14,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:14,318 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] [2021-06-05 07:58:14,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 07:58:14,520 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:14,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:14,520 INFO L82 PathProgramCache]: Analyzing trace with hash 71286567, now seen corresponding path program 68 times [2021-06-05 07:58:14,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:14,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426781964] [2021-06-05 07:58:14,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:14,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:14,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426781964] [2021-06-05 07:58:14,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426781964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:14,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128784381] [2021-06-05 07:58:14,647 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 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 [2021-06-05 07:58:14,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:58:14,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:14,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:58:14,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:14,830 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:14,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128784381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:14,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:14,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 07:58:14,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880356721] [2021-06-05 07:58:14,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:58:14,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:14,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:58:14,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:58:14,832 INFO L87 Difference]: Start difference. First operand 2528 states and 6968 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) [2021-06-05 07:58:15,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:15,159 INFO L93 Difference]: Finished difference Result 3496 states and 9107 transitions. [2021-06-05 07:58:15,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:58:15,160 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 [2021-06-05 07:58:15,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:15,162 INFO L225 Difference]: With dead ends: 3496 [2021-06-05 07:58:15,162 INFO L226 Difference]: Without dead ends: 3226 [2021-06-05 07:58:15,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 308.9ms TimeCoverageRelationStatistics Valid=366, Invalid=1116, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:58:15,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-06-05 07:58:15,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2603. [2021-06-05 07:58:15,184 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) [2021-06-05 07:58:15,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7193 transitions. [2021-06-05 07:58:15,187 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7193 transitions. Word has length 90 [2021-06-05 07:58:15,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:15,187 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7193 transitions. [2021-06-05 07:58:15,187 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) [2021-06-05 07:58:15,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7193 transitions. [2021-06-05 07:58:15,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 07:58:15,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:15,189 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] [2021-06-05 07:58:15,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:15,390 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:15,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:15,390 INFO L82 PathProgramCache]: Analyzing trace with hash 2101605879, now seen corresponding path program 69 times [2021-06-05 07:58:15,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:15,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225290309] [2021-06-05 07:58:15,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:15,503 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:15,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:15,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225290309] [2021-06-05 07:58:15,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225290309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:15,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929349086] [2021-06-05 07:58:15,504 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 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 [2021-06-05 07:58:15,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 07:58:15,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:15,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:58:15,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:15,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929349086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:15,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:15,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 07:58:15,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531940454] [2021-06-05 07:58:15,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:58:15,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:15,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:58:15,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:58:15,714 INFO L87 Difference]: Start difference. First operand 2603 states and 7193 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:16,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:16,140 INFO L93 Difference]: Finished difference Result 3521 states and 9232 transitions. [2021-06-05 07:58:16,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:58:16,141 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:58:16,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:16,144 INFO L225 Difference]: With dead ends: 3521 [2021-06-05 07:58:16,144 INFO L226 Difference]: Without dead ends: 3251 [2021-06-05 07:58:16,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 400.4ms TimeCoverageRelationStatistics Valid=376, Invalid=1264, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:58:16,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3251 states. [2021-06-05 07:58:16,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3251 to 2678. [2021-06-05 07:58:16,171 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) [2021-06-05 07:58:16,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7418 transitions. [2021-06-05 07:58:16,175 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7418 transitions. Word has length 90 [2021-06-05 07:58:16,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:16,175 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7418 transitions. [2021-06-05 07:58:16,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:16,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7418 transitions. [2021-06-05 07:58:16,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 07:58:16,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:16,177 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] [2021-06-05 07:58:16,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:16,379 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:16,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:16,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1579121947, now seen corresponding path program 70 times [2021-06-05 07:58:16,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:16,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243043543] [2021-06-05 07:58:16,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:16,486 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:16,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:16,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243043543] [2021-06-05 07:58:16,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243043543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:16,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443192781] [2021-06-05 07:58:16,486 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 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 [2021-06-05 07:58:16,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:58:16,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:16,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:58:16,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:16,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443192781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:16,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:16,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 07:58:16,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175193959] [2021-06-05 07:58:16,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:58:16,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:16,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:58:16,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:58:16,671 INFO L87 Difference]: Start difference. First operand 2678 states and 7418 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) [2021-06-05 07:58:17,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:17,035 INFO L93 Difference]: Finished difference Result 3591 states and 9477 transitions. [2021-06-05 07:58:17,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:58:17,035 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 [2021-06-05 07:58:17,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:17,039 INFO L225 Difference]: With dead ends: 3591 [2021-06-05 07:58:17,039 INFO L226 Difference]: Without dead ends: 3321 [2021-06-05 07:58:17,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 344.8ms TimeCoverageRelationStatistics Valid=426, Invalid=1214, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:58:17,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-06-05 07:58:17,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2753. [2021-06-05 07:58:17,089 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) [2021-06-05 07:58:17,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7658 transitions. [2021-06-05 07:58:17,093 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7658 transitions. Word has length 90 [2021-06-05 07:58:17,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:17,093 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7658 transitions. [2021-06-05 07:58:17,093 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) [2021-06-05 07:58:17,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7658 transitions. [2021-06-05 07:58:17,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 07:58:17,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:17,095 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] [2021-06-05 07:58:17,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:17,296 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:17,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:17,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1000603061, now seen corresponding path program 71 times [2021-06-05 07:58:17,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:17,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855448187] [2021-06-05 07:58:17,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:17,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:17,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855448187] [2021-06-05 07:58:17,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855448187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:17,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597994880] [2021-06-05 07:58:17,450 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 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 [2021-06-05 07:58:17,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 07:58:17,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:17,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:58:17,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:17,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597994880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:17,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:17,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 07:58:17,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809881052] [2021-06-05 07:58:17,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:58:17,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:17,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:58:17,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:58:17,679 INFO L87 Difference]: Start difference. First operand 2753 states and 7658 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:18,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:18,235 INFO L93 Difference]: Finished difference Result 4169 states and 11103 transitions. [2021-06-05 07:58:18,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:58:18,235 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:58:18,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:18,239 INFO L225 Difference]: With dead ends: 4169 [2021-06-05 07:58:18,239 INFO L226 Difference]: Without dead ends: 3546 [2021-06-05 07:58:18,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 514.9ms TimeCoverageRelationStatistics Valid=534, Invalid=1628, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:58:18,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2021-06-05 07:58:18,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 2828. [2021-06-05 07:58:18,263 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) [2021-06-05 07:58:18,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7888 transitions. [2021-06-05 07:58:18,266 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7888 transitions. Word has length 90 [2021-06-05 07:58:18,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:18,267 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7888 transitions. [2021-06-05 07:58:18,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:58:18,267 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7888 transitions. [2021-06-05 07:58:18,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 07:58:18,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:18,269 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] [2021-06-05 07:58:18,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:18,469 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:18,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:18,469 INFO L82 PathProgramCache]: Analyzing trace with hash -32044541, now seen corresponding path program 72 times [2021-06-05 07:58:18,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:18,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203232074] [2021-06-05 07:58:18,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:18,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:18,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203232074] [2021-06-05 07:58:18,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203232074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:18,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116205956] [2021-06-05 07:58:18,592 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 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 [2021-06-05 07:58:18,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 07:58:18,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:18,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:58:18,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:18,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116205956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:18,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:18,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 07:58:18,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728925111] [2021-06-05 07:58:18,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:58:18,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:18,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:58:18,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:58:18,800 INFO L87 Difference]: Start difference. First operand 2828 states and 7888 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) [2021-06-05 07:58:19,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:19,210 INFO L93 Difference]: Finished difference Result 4398 states and 11821 transitions. [2021-06-05 07:58:19,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:58:19,210 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 [2021-06-05 07:58:19,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:19,214 INFO L225 Difference]: With dead ends: 4398 [2021-06-05 07:58:19,214 INFO L226 Difference]: Without dead ends: 4128 [2021-06-05 07:58:19,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 369.9ms TimeCoverageRelationStatistics Valid=503, Invalid=1303, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:58:19,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2021-06-05 07:58:19,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 3008. [2021-06-05 07:58:19,240 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) [2021-06-05 07:58:19,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 8447 transitions. [2021-06-05 07:58:19,244 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 8447 transitions. Word has length 90 [2021-06-05 07:58:19,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:19,244 INFO L482 AbstractCegarLoop]: Abstraction has 3008 states and 8447 transitions. [2021-06-05 07:58:19,244 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) [2021-06-05 07:58:19,244 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 8447 transitions. [2021-06-05 07:58:19,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 07:58:19,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:19,246 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] [2021-06-05 07:58:19,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:19,446 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:19,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:19,447 INFO L82 PathProgramCache]: Analyzing trace with hash -9701291, now seen corresponding path program 73 times [2021-06-05 07:58:19,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:19,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827277986] [2021-06-05 07:58:19,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:19,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:19,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827277986] [2021-06-05 07:58:19,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827277986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:19,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911974080] [2021-06-05 07:58:19,558 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 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 [2021-06-05 07:58:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:19,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:58:19,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:19,732 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:19,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911974080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:19,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:19,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 07:58:19,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47973313] [2021-06-05 07:58:19,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:58:19,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:19,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:58:19,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:58:19,733 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) [2021-06-05 07:58:20,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:20,235 INFO L93 Difference]: Finished difference Result 3885 states and 10521 transitions. [2021-06-05 07:58:20,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:58:20,235 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 [2021-06-05 07:58:20,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:20,239 INFO L225 Difference]: With dead ends: 3885 [2021-06-05 07:58:20,239 INFO L226 Difference]: Without dead ends: 3306 [2021-06-05 07:58:20,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 467.4ms TimeCoverageRelationStatistics Valid=579, Invalid=1491, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:58:20,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-06-05 07:58:20,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 2113. [2021-06-05 07:58:20,261 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) [2021-06-05 07:58:20,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 5778 transitions. [2021-06-05 07:58:20,264 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 5778 transitions. Word has length 90 [2021-06-05 07:58:20,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:20,264 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 5778 transitions. [2021-06-05 07:58:20,264 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) [2021-06-05 07:58:20,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 5778 transitions. [2021-06-05 07:58:20,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 07:58:20,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:20,265 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] [2021-06-05 07:58:20,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-05 07:58:20,466 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:20,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:20,466 INFO L82 PathProgramCache]: Analyzing trace with hash -567911574, now seen corresponding path program 74 times [2021-06-05 07:58:20,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:20,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224929049] [2021-06-05 07:58:20,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:20,612 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:20,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:20,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224929049] [2021-06-05 07:58:20,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224929049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:20,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568013850] [2021-06-05 07:58:20,612 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 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 [2021-06-05 07:58:20,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:58:20,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:20,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:58:20,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:20,800 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:20,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568013850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:20,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:20,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 07:58:20,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536202248] [2021-06-05 07:58:20,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:58:20,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:20,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:58:20,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:58:20,802 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) [2021-06-05 07:58:21,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:21,064 INFO L93 Difference]: Finished difference Result 3131 states and 8017 transitions. [2021-06-05 07:58:21,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:58:21,065 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 [2021-06-05 07:58:21,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:21,071 INFO L225 Difference]: With dead ends: 3131 [2021-06-05 07:58:21,071 INFO L226 Difference]: Without dead ends: 2861 [2021-06-05 07:58:21,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 288.3ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:58:21,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-06-05 07:58:21,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2188. [2021-06-05 07:58:21,123 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) [2021-06-05 07:58:21,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 6003 transitions. [2021-06-05 07:58:21,126 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 6003 transitions. Word has length 95 [2021-06-05 07:58:21,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:21,126 INFO L482 AbstractCegarLoop]: Abstraction has 2188 states and 6003 transitions. [2021-06-05 07:58:21,126 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) [2021-06-05 07:58:21,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 6003 transitions. [2021-06-05 07:58:21,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 07:58:21,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:21,128 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] [2021-06-05 07:58:21,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:21,328 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:21,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:21,329 INFO L82 PathProgramCache]: Analyzing trace with hash -812988870, now seen corresponding path program 75 times [2021-06-05 07:58:21,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:21,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795036979] [2021-06-05 07:58:21,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:21,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:21,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795036979] [2021-06-05 07:58:21,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795036979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:21,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702562467] [2021-06-05 07:58:21,477 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 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 [2021-06-05 07:58:21,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 07:58:21,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:21,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:58:21,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:21,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702562467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:21,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:21,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 07:58:21,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818096549] [2021-06-05 07:58:21,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:58:21,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:21,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:58:21,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:58:21,676 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) [2021-06-05 07:58:21,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:21,998 INFO L93 Difference]: Finished difference Result 3451 states and 8732 transitions. [2021-06-05 07:58:21,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:58:21,998 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 [2021-06-05 07:58:21,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:22,002 INFO L225 Difference]: With dead ends: 3451 [2021-06-05 07:58:22,002 INFO L226 Difference]: Without dead ends: 3181 [2021-06-05 07:58:22,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 341.9ms TimeCoverageRelationStatistics Valid=355, Invalid=1127, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:58:22,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-06-05 07:58:22,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 2263. [2021-06-05 07:58:22,024 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) [2021-06-05 07:58:22,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6228 transitions. [2021-06-05 07:58:22,027 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6228 transitions. Word has length 95 [2021-06-05 07:58:22,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:22,027 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6228 transitions. [2021-06-05 07:58:22,027 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) [2021-06-05 07:58:22,028 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6228 transitions. [2021-06-05 07:58:22,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 07:58:22,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:22,029 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] [2021-06-05 07:58:22,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:22,230 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:22,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:22,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1189839192, now seen corresponding path program 76 times [2021-06-05 07:58:22,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:22,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20731554] [2021-06-05 07:58:22,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:22,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:22,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20731554] [2021-06-05 07:58:22,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20731554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:22,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166037582] [2021-06-05 07:58:22,359 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 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 [2021-06-05 07:58:22,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:58:22,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:22,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:58:22,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:22,531 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:22,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166037582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:22,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:22,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 07:58:22,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078511897] [2021-06-05 07:58:22,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:58:22,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:22,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:58:22,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:58:22,532 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) [2021-06-05 07:58:22,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:22,834 INFO L93 Difference]: Finished difference Result 3481 states and 8867 transitions. [2021-06-05 07:58:22,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:58:22,835 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 [2021-06-05 07:58:22,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:22,838 INFO L225 Difference]: With dead ends: 3481 [2021-06-05 07:58:22,838 INFO L226 Difference]: Without dead ends: 3211 [2021-06-05 07:58:22,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 308.3ms TimeCoverageRelationStatistics Valid=361, Invalid=1121, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:58:22,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-06-05 07:58:22,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 2338. [2021-06-05 07:58:22,858 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) [2021-06-05 07:58:22,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6453 transitions. [2021-06-05 07:58:22,861 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6453 transitions. Word has length 95 [2021-06-05 07:58:22,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:22,861 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6453 transitions. [2021-06-05 07:58:22,861 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) [2021-06-05 07:58:22,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6453 transitions. [2021-06-05 07:58:22,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 07:58:22,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:22,863 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] [2021-06-05 07:58:23,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 07:58:23,063 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:23,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:23,064 INFO L82 PathProgramCache]: Analyzing trace with hash 136916344, now seen corresponding path program 77 times [2021-06-05 07:58:23,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:23,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371103580] [2021-06-05 07:58:23,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:23,223 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:23,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:23,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371103580] [2021-06-05 07:58:23,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371103580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:23,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796845360] [2021-06-05 07:58:23,224 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 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 [2021-06-05 07:58:23,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 07:58:23,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:23,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:58:23,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:23,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796845360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:23,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:23,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 07:58:23,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231854377] [2021-06-05 07:58:23,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:58:23,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:23,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:58:23,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:58:23,424 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) [2021-06-05 07:58:23,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:23,803 INFO L93 Difference]: Finished difference Result 3506 states and 8992 transitions. [2021-06-05 07:58:23,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:58:23,804 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 [2021-06-05 07:58:23,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:23,807 INFO L225 Difference]: With dead ends: 3506 [2021-06-05 07:58:23,807 INFO L226 Difference]: Without dead ends: 3236 [2021-06-05 07:58:23,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 400.0ms TimeCoverageRelationStatistics Valid=383, Invalid=1257, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:58:23,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-06-05 07:58:23,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 2413. [2021-06-05 07:58:23,827 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) [2021-06-05 07:58:23,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6678 transitions. [2021-06-05 07:58:23,830 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6678 transitions. Word has length 95 [2021-06-05 07:58:23,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:23,830 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6678 transitions. [2021-06-05 07:58:23,830 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) [2021-06-05 07:58:23,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6678 transitions. [2021-06-05 07:58:23,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 07:58:23,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:23,831 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] [2021-06-05 07:58:24,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:24,032 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:24,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:24,032 INFO L82 PathProgramCache]: Analyzing trace with hash 591132518, now seen corresponding path program 78 times [2021-06-05 07:58:24,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:24,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423705489] [2021-06-05 07:58:24,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:24,169 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:24,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:24,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423705489] [2021-06-05 07:58:24,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423705489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:24,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282960224] [2021-06-05 07:58:24,170 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 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 [2021-06-05 07:58:24,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 07:58:24,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:24,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:58:24,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:24,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282960224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:24,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:24,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 07:58:24,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292357117] [2021-06-05 07:58:24,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:58:24,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:24,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:58:24,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:58:24,384 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) [2021-06-05 07:58:24,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:24,732 INFO L93 Difference]: Finished difference Result 3531 states and 9117 transitions. [2021-06-05 07:58:24,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:58:24,732 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 [2021-06-05 07:58:24,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:24,736 INFO L225 Difference]: With dead ends: 3531 [2021-06-05 07:58:24,736 INFO L226 Difference]: Without dead ends: 3261 [2021-06-05 07:58:24,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 350.6ms TimeCoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:58:24,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3261 states. [2021-06-05 07:58:24,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3261 to 2488. [2021-06-05 07:58:24,762 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) [2021-06-05 07:58:24,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6903 transitions. [2021-06-05 07:58:24,765 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6903 transitions. Word has length 95 [2021-06-05 07:58:24,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:24,765 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6903 transitions. [2021-06-05 07:58:24,765 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) [2021-06-05 07:58:24,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6903 transitions. [2021-06-05 07:58:24,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 07:58:24,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:24,767 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] [2021-06-05 07:58:24,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:24,968 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:24,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:24,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1590028854, now seen corresponding path program 79 times [2021-06-05 07:58:24,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:24,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635536382] [2021-06-05 07:58:24,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:25,120 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:25,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:25,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635536382] [2021-06-05 07:58:25,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635536382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:25,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904193172] [2021-06-05 07:58:25,120 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 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 [2021-06-05 07:58:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:25,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:58:25,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:25,332 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:25,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904193172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:25,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:25,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 07:58:25,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213911743] [2021-06-05 07:58:25,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:58:25,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:25,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:58:25,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:58:25,334 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) [2021-06-05 07:58:25,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:25,850 INFO L93 Difference]: Finished difference Result 3556 states and 9242 transitions. [2021-06-05 07:58:25,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:58:25,850 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 [2021-06-05 07:58:25,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:25,854 INFO L225 Difference]: With dead ends: 3556 [2021-06-05 07:58:25,854 INFO L226 Difference]: Without dead ends: 3286 [2021-06-05 07:58:25,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 485.3ms TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:58:25,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-06-05 07:58:25,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 2563. [2021-06-05 07:58:25,877 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) [2021-06-05 07:58:25,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7128 transitions. [2021-06-05 07:58:25,880 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7128 transitions. Word has length 95 [2021-06-05 07:58:25,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:25,880 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7128 transitions. [2021-06-05 07:58:25,880 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) [2021-06-05 07:58:25,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7128 transitions. [2021-06-05 07:58:25,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 07:58:25,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:25,882 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] [2021-06-05 07:58:26,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:26,083 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:26,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:26,083 INFO L82 PathProgramCache]: Analyzing trace with hash -289299036, now seen corresponding path program 80 times [2021-06-05 07:58:26,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:26,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487534004] [2021-06-05 07:58:26,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:26,213 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:26,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:26,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487534004] [2021-06-05 07:58:26,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487534004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:26,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971738799] [2021-06-05 07:58:26,214 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 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 [2021-06-05 07:58:26,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:58:26,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:26,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:58:26,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:26,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971738799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:26,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:26,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 07:58:26,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784891328] [2021-06-05 07:58:26,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:58:26,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:26,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:58:26,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:58:26,399 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) [2021-06-05 07:58:26,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:26,785 INFO L93 Difference]: Finished difference Result 3581 states and 9367 transitions. [2021-06-05 07:58:26,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:58:26,786 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 [2021-06-05 07:58:26,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:26,789 INFO L225 Difference]: With dead ends: 3581 [2021-06-05 07:58:26,789 INFO L226 Difference]: Without dead ends: 3311 [2021-06-05 07:58:26,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 368.5ms TimeCoverageRelationStatistics Valid=461, Invalid=1345, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:58:26,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2021-06-05 07:58:26,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 2638. [2021-06-05 07:58:26,813 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) [2021-06-05 07:58:26,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7353 transitions. [2021-06-05 07:58:26,816 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7353 transitions. Word has length 95 [2021-06-05 07:58:26,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:26,816 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7353 transitions. [2021-06-05 07:58:26,816 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) [2021-06-05 07:58:26,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7353 transitions. [2021-06-05 07:58:26,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 07:58:26,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:26,818 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] [2021-06-05 07:58:27,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-06-05 07:58:27,019 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:27,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:27,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1741020276, now seen corresponding path program 81 times [2021-06-05 07:58:27,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:27,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300310514] [2021-06-05 07:58:27,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:27,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:27,136 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:27,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:27,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300310514] [2021-06-05 07:58:27,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300310514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:27,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576647183] [2021-06-05 07:58:27,137 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 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 [2021-06-05 07:58:27,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 07:58:27,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:27,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:58:27,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:27,344 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:27,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576647183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:27,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:27,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 07:58:27,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574348066] [2021-06-05 07:58:27,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:58:27,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:27,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:58:27,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:58:27,345 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) [2021-06-05 07:58:27,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:27,827 INFO L93 Difference]: Finished difference Result 3606 states and 9492 transitions. [2021-06-05 07:58:27,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:58:27,828 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 [2021-06-05 07:58:27,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:27,831 INFO L225 Difference]: With dead ends: 3606 [2021-06-05 07:58:27,831 INFO L226 Difference]: Without dead ends: 3336 [2021-06-05 07:58:27,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 455.6ms TimeCoverageRelationStatistics Valid=466, Invalid=1514, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:58:27,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-06-05 07:58:27,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2713. [2021-06-05 07:58:27,854 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) [2021-06-05 07:58:27,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7578 transitions. [2021-06-05 07:58:27,857 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7578 transitions. Word has length 95 [2021-06-05 07:58:27,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:27,857 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7578 transitions. [2021-06-05 07:58:27,858 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) [2021-06-05 07:58:27,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7578 transitions. [2021-06-05 07:58:27,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 07:58:27,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:27,859 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] [2021-06-05 07:58:28,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:28,060 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:28,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:28,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1939707550, now seen corresponding path program 82 times [2021-06-05 07:58:28,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:28,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55597612] [2021-06-05 07:58:28,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:28,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:28,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:28,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55597612] [2021-06-05 07:58:28,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55597612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:28,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064994526] [2021-06-05 07:58:28,199 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 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 [2021-06-05 07:58:28,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:58:28,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:28,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:58:28,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:28,405 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:28,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064994526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:28,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:28,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 07:58:28,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257478749] [2021-06-05 07:58:28,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:58:28,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:28,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:58:28,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:58:28,406 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) [2021-06-05 07:58:28,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:28,805 INFO L93 Difference]: Finished difference Result 3631 states and 9617 transitions. [2021-06-05 07:58:28,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:58:28,806 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 [2021-06-05 07:58:28,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:28,810 INFO L225 Difference]: With dead ends: 3631 [2021-06-05 07:58:28,810 INFO L226 Difference]: Without dead ends: 3361 [2021-06-05 07:58:28,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 383.6ms TimeCoverageRelationStatistics Valid=535, Invalid=1445, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:58:28,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3361 states. [2021-06-05 07:58:28,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3361 to 2788. [2021-06-05 07:58:28,837 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) [2021-06-05 07:58:28,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7803 transitions. [2021-06-05 07:58:28,840 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7803 transitions. Word has length 95 [2021-06-05 07:58:28,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:28,840 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7803 transitions. [2021-06-05 07:58:28,840 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) [2021-06-05 07:58:28,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7803 transitions. [2021-06-05 07:58:28,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 07:58:28,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:28,842 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] [2021-06-05 07:58:29,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 07:58:29,043 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:29,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:29,043 INFO L82 PathProgramCache]: Analyzing trace with hash 640017458, now seen corresponding path program 83 times [2021-06-05 07:58:29,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:29,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725081269] [2021-06-05 07:58:29,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:29,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:29,173 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:29,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:29,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725081269] [2021-06-05 07:58:29,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725081269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:29,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371621680] [2021-06-05 07:58:29,173 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 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 [2021-06-05 07:58:29,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 07:58:29,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:29,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:58:29,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:29,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371621680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:29,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:29,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 07:58:29,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148298703] [2021-06-05 07:58:29,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:58:29,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:29,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:58:29,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:58:29,355 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) [2021-06-05 07:58:29,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:29,885 INFO L93 Difference]: Finished difference Result 3716 states and 9907 transitions. [2021-06-05 07:58:29,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:58:29,885 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 [2021-06-05 07:58:29,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:29,888 INFO L225 Difference]: With dead ends: 3716 [2021-06-05 07:58:29,888 INFO L226 Difference]: Without dead ends: 3446 [2021-06-05 07:58:29,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 488.9ms TimeCoverageRelationStatistics Valid=563, Invalid=1599, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:58:29,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-06-05 07:58:29,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2863. [2021-06-05 07:58:29,913 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) [2021-06-05 07:58:29,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 8048 transitions. [2021-06-05 07:58:29,917 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 8048 transitions. Word has length 95 [2021-06-05 07:58:29,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:29,917 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 8048 transitions. [2021-06-05 07:58:29,917 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) [2021-06-05 07:58:29,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 8048 transitions. [2021-06-05 07:58:29,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 07:58:29,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:29,919 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] [2021-06-05 07:58:30,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-06-05 07:58:30,120 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:30,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:30,121 INFO L82 PathProgramCache]: Analyzing trace with hash -392630144, now seen corresponding path program 84 times [2021-06-05 07:58:30,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:30,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001144053] [2021-06-05 07:58:30,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:30,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:30,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001144053] [2021-06-05 07:58:30,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001144053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:30,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275959830] [2021-06-05 07:58:30,240 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 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 [2021-06-05 07:58:30,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 07:58:30,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:30,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:58:30,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:30,411 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:30,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275959830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:30,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:30,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 07:58:30,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467542373] [2021-06-05 07:58:30,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:58:30,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:30,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:58:30,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:58:30,412 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) [2021-06-05 07:58:30,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:30,839 INFO L93 Difference]: Finished difference Result 4458 states and 12031 transitions. [2021-06-05 07:58:30,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:58:30,839 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 [2021-06-05 07:58:30,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:30,844 INFO L225 Difference]: With dead ends: 4458 [2021-06-05 07:58:30,844 INFO L226 Difference]: Without dead ends: 4188 [2021-06-05 07:58:30,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 385.6ms TimeCoverageRelationStatistics Valid=626, Invalid=1536, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:58:30,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2021-06-05 07:58:30,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 3043. [2021-06-05 07:58:30,874 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) [2021-06-05 07:58:30,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 8607 transitions. [2021-06-05 07:58:30,878 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 8607 transitions. Word has length 95 [2021-06-05 07:58:30,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:30,878 INFO L482 AbstractCegarLoop]: Abstraction has 3043 states and 8607 transitions. [2021-06-05 07:58:30,878 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) [2021-06-05 07:58:30,879 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 8607 transitions. [2021-06-05 07:58:30,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 07:58:30,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:30,880 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] [2021-06-05 07:58:31,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:31,081 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:31,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:31,081 INFO L82 PathProgramCache]: Analyzing trace with hash -370286894, now seen corresponding path program 85 times [2021-06-05 07:58:31,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:31,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220322977] [2021-06-05 07:58:31,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:31,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:31,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220322977] [2021-06-05 07:58:31,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220322977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:31,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995866216] [2021-06-05 07:58:31,198 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 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 [2021-06-05 07:58:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:31,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:58:31,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:31,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995866216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:31,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:31,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 07:58:31,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127118347] [2021-06-05 07:58:31,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:58:31,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:31,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:58:31,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:58:31,371 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) [2021-06-05 07:58:31,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:31,907 INFO L93 Difference]: Finished difference Result 3920 states and 10681 transitions. [2021-06-05 07:58:31,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:58:31,907 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 [2021-06-05 07:58:31,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:31,911 INFO L225 Difference]: With dead ends: 3920 [2021-06-05 07:58:31,911 INFO L226 Difference]: Without dead ends: 3431 [2021-06-05 07:58:31,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 499.2ms TimeCoverageRelationStatistics Valid=658, Invalid=1694, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:58:31,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2021-06-05 07:58:31,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 2034. [2021-06-05 07:58:31,930 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) [2021-06-05 07:58:31,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5566 transitions. [2021-06-05 07:58:31,932 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5566 transitions. Word has length 95 [2021-06-05 07:58:31,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:31,932 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 5566 transitions. [2021-06-05 07:58:31,932 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) [2021-06-05 07:58:31,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5566 transitions. [2021-06-05 07:58:31,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:58:31,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:31,934 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] [2021-06-05 07:58:32,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:32,134 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:32,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:32,135 INFO L82 PathProgramCache]: Analyzing trace with hash -2121147398, now seen corresponding path program 86 times [2021-06-05 07:58:32,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:32,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999464172] [2021-06-05 07:58:32,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:32,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:32,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:32,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999464172] [2021-06-05 07:58:32,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999464172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:32,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269375606] [2021-06-05 07:58:32,316 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 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 [2021-06-05 07:58:32,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:58:32,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:32,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:58:32,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:32,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269375606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:32,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:32,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 07:58:32,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609528614] [2021-06-05 07:58:32,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:32,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:32,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:32,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:32,526 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) [2021-06-05 07:58:32,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:32,864 INFO L93 Difference]: Finished difference Result 3024 states and 7866 transitions. [2021-06-05 07:58:32,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:58:32,864 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 [2021-06-05 07:58:32,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:32,867 INFO L225 Difference]: With dead ends: 3024 [2021-06-05 07:58:32,867 INFO L226 Difference]: Without dead ends: 2690 [2021-06-05 07:58:32,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 392.6ms TimeCoverageRelationStatistics Valid=445, Invalid=1277, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:58:32,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2021-06-05 07:58:32,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2119. [2021-06-05 07:58:32,885 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) [2021-06-05 07:58:32,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 5736 transitions. [2021-06-05 07:58:32,887 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 5736 transitions. Word has length 100 [2021-06-05 07:58:32,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:32,887 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 5736 transitions. [2021-06-05 07:58:32,887 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) [2021-06-05 07:58:32,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 5736 transitions. [2021-06-05 07:58:32,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:58:32,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:32,889 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] [2021-06-05 07:58:33,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:33,099 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:33,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:33,099 INFO L82 PathProgramCache]: Analyzing trace with hash 93978558, now seen corresponding path program 87 times [2021-06-05 07:58:33,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:33,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206142387] [2021-06-05 07:58:33,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:33,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:33,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:33,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206142387] [2021-06-05 07:58:33,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206142387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:33,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054870903] [2021-06-05 07:58:33,250 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 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 [2021-06-05 07:58:33,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 07:58:33,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:33,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:58:33,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:33,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054870903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:33,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:33,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 07:58:33,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152784935] [2021-06-05 07:58:33,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:58:33,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:33,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:58:33,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:58:33,445 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) [2021-06-05 07:58:33,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:33,704 INFO L93 Difference]: Finished difference Result 3646 states and 9047 transitions. [2021-06-05 07:58:33,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:58:33,705 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 [2021-06-05 07:58:33,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:33,709 INFO L225 Difference]: With dead ends: 3646 [2021-06-05 07:58:33,709 INFO L226 Difference]: Without dead ends: 3376 [2021-06-05 07:58:33,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 293.0ms TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:58:33,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2021-06-05 07:58:33,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 2263. [2021-06-05 07:58:33,733 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) [2021-06-05 07:58:33,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6153 transitions. [2021-06-05 07:58:33,735 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6153 transitions. Word has length 100 [2021-06-05 07:58:33,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:33,735 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6153 transitions. [2021-06-05 07:58:33,736 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) [2021-06-05 07:58:33,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6153 transitions. [2021-06-05 07:58:33,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:58:33,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:33,737 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] [2021-06-05 07:58:33,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 07:58:33,938 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:33,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:33,938 INFO L82 PathProgramCache]: Analyzing trace with hash 903030414, now seen corresponding path program 88 times [2021-06-05 07:58:33,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:33,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492713027] [2021-06-05 07:58:33,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:33,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:34,096 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:34,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:34,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492713027] [2021-06-05 07:58:34,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492713027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:34,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357482371] [2021-06-05 07:58:34,097 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 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 [2021-06-05 07:58:34,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:58:34,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:34,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:58:34,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:34,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357482371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:34,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:34,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 07:58:34,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471552276] [2021-06-05 07:58:34,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:58:34,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:34,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:58:34,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:58:34,300 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) [2021-06-05 07:58:34,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:34,637 INFO L93 Difference]: Finished difference Result 3606 states and 9042 transitions. [2021-06-05 07:58:34,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:58:34,637 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 [2021-06-05 07:58:34,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:34,640 INFO L225 Difference]: With dead ends: 3606 [2021-06-05 07:58:34,640 INFO L226 Difference]: Without dead ends: 3336 [2021-06-05 07:58:34,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 363.7ms TimeCoverageRelationStatistics Valid=389, Invalid=1171, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 07:58:34,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-06-05 07:58:34,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2338. [2021-06-05 07:58:34,662 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) [2021-06-05 07:58:34,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6378 transitions. [2021-06-05 07:58:34,665 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6378 transitions. Word has length 100 [2021-06-05 07:58:34,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:34,665 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6378 transitions. [2021-06-05 07:58:34,665 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) [2021-06-05 07:58:34,665 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6378 transitions. [2021-06-05 07:58:34,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:58:34,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:34,667 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] [2021-06-05 07:58:34,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 07:58:34,868 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:34,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:34,868 INFO L82 PathProgramCache]: Analyzing trace with hash -488919684, now seen corresponding path program 89 times [2021-06-05 07:58:34,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:34,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42520713] [2021-06-05 07:58:34,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:35,021 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:35,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:35,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42520713] [2021-06-05 07:58:35,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42520713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:35,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8745509] [2021-06-05 07:58:35,022 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 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 [2021-06-05 07:58:35,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 07:58:35,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:35,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:58:35,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:35,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8745509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:35,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:35,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 07:58:35,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958016772] [2021-06-05 07:58:35,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:58:35,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:35,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:58:35,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:58:35,205 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) [2021-06-05 07:58:35,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:35,515 INFO L93 Difference]: Finished difference Result 3656 states and 9217 transitions. [2021-06-05 07:58:35,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:58:35,515 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 [2021-06-05 07:58:35,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:35,519 INFO L225 Difference]: With dead ends: 3656 [2021-06-05 07:58:35,519 INFO L226 Difference]: Without dead ends: 3386 [2021-06-05 07:58:35,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 323.7ms TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 07:58:35,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-06-05 07:58:35,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 2413. [2021-06-05 07:58:35,542 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) [2021-06-05 07:58:35,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6603 transitions. [2021-06-05 07:58:35,545 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6603 transitions. Word has length 100 [2021-06-05 07:58:35,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:35,545 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6603 transitions. [2021-06-05 07:58:35,545 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) [2021-06-05 07:58:35,545 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6603 transitions. [2021-06-05 07:58:35,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:58:35,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:35,547 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] [2021-06-05 07:58:35,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 07:58:35,747 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:35,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:35,747 INFO L82 PathProgramCache]: Analyzing trace with hash -733996980, now seen corresponding path program 90 times [2021-06-05 07:58:35,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:35,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85065582] [2021-06-05 07:58:35,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:35,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:35,906 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:35,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:35,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85065582] [2021-06-05 07:58:35,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85065582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:35,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897742122] [2021-06-05 07:58:35,907 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 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 [2021-06-05 07:58:35,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 07:58:35,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:35,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:58:35,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:36,101 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:36,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897742122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:36,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:36,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 07:58:36,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558815804] [2021-06-05 07:58:36,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:58:36,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:36,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:58:36,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:58:36,103 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) [2021-06-05 07:58:36,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:36,485 INFO L93 Difference]: Finished difference Result 3681 states and 9342 transitions. [2021-06-05 07:58:36,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:58:36,486 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 [2021-06-05 07:58:36,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:36,489 INFO L225 Difference]: With dead ends: 3681 [2021-06-05 07:58:36,489 INFO L226 Difference]: Without dead ends: 3411 [2021-06-05 07:58:36,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 404.0ms TimeCoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:58:36,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2021-06-05 07:58:36,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 2488. [2021-06-05 07:58:36,512 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) [2021-06-05 07:58:36,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6828 transitions. [2021-06-05 07:58:36,515 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6828 transitions. Word has length 100 [2021-06-05 07:58:36,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:36,515 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6828 transitions. [2021-06-05 07:58:36,515 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) [2021-06-05 07:58:36,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6828 transitions. [2021-06-05 07:58:36,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:58:36,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:36,517 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] [2021-06-05 07:58:36,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 07:58:36,719 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:36,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:36,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1110847302, now seen corresponding path program 91 times [2021-06-05 07:58:36,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:36,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826795327] [2021-06-05 07:58:36,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:36,873 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:36,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:36,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826795327] [2021-06-05 07:58:36,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826795327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:36,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118654069] [2021-06-05 07:58:36,873 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 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 [2021-06-05 07:58:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:36,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:58:36,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:37,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118654069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:37,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:37,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 07:58:37,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988814649] [2021-06-05 07:58:37,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:58:37,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:37,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:58:37,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:58:37,070 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) [2021-06-05 07:58:37,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:37,403 INFO L93 Difference]: Finished difference Result 3706 states and 9467 transitions. [2021-06-05 07:58:37,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:58:37,404 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 [2021-06-05 07:58:37,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:37,407 INFO L225 Difference]: With dead ends: 3706 [2021-06-05 07:58:37,407 INFO L226 Difference]: Without dead ends: 3436 [2021-06-05 07:58:37,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 347.4ms TimeCoverageRelationStatistics Valid=372, Invalid=1188, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 07:58:37,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2021-06-05 07:58:37,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 2563. [2021-06-05 07:58:37,430 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) [2021-06-05 07:58:37,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7053 transitions. [2021-06-05 07:58:37,433 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7053 transitions. Word has length 100 [2021-06-05 07:58:37,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:37,433 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7053 transitions. [2021-06-05 07:58:37,433 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) [2021-06-05 07:58:37,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7053 transitions. [2021-06-05 07:58:37,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:58:37,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:37,435 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] [2021-06-05 07:58:37,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 07:58:37,636 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:37,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:37,636 INFO L82 PathProgramCache]: Analyzing trace with hash 215908234, now seen corresponding path program 92 times [2021-06-05 07:58:37,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:37,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142897999] [2021-06-05 07:58:37,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:37,777 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:37,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:37,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142897999] [2021-06-05 07:58:37,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142897999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:37,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687469819] [2021-06-05 07:58:37,777 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 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 [2021-06-05 07:58:37,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:58:37,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:37,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:58:37,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:37,987 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:37,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687469819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:37,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:37,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 07:58:37,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737945975] [2021-06-05 07:58:37,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:58:37,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:37,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:58:37,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:58:37,988 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) [2021-06-05 07:58:38,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:38,417 INFO L93 Difference]: Finished difference Result 3731 states and 9592 transitions. [2021-06-05 07:58:38,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:58:38,417 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 [2021-06-05 07:58:38,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:38,421 INFO L225 Difference]: With dead ends: 3731 [2021-06-05 07:58:38,421 INFO L226 Difference]: Without dead ends: 3461 [2021-06-05 07:58:38,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 428.2ms TimeCoverageRelationStatistics Valid=443, Invalid=1449, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:58:38,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3461 states. [2021-06-05 07:58:38,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3461 to 2638. [2021-06-05 07:58:38,444 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) [2021-06-05 07:58:38,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7278 transitions. [2021-06-05 07:58:38,447 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7278 transitions. Word has length 100 [2021-06-05 07:58:38,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:38,447 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7278 transitions. [2021-06-05 07:58:38,448 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) [2021-06-05 07:58:38,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7278 transitions. [2021-06-05 07:58:38,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:58:38,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:38,449 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] [2021-06-05 07:58:38,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 07:58:38,652 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:38,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:38,652 INFO L82 PathProgramCache]: Analyzing trace with hash 670124408, now seen corresponding path program 93 times [2021-06-05 07:58:38,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:38,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289977848] [2021-06-05 07:58:38,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:38,780 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:38,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:38,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289977848] [2021-06-05 07:58:38,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289977848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:38,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857142899] [2021-06-05 07:58:38,780 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 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 [2021-06-05 07:58:38,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 07:58:38,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:38,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:58:38,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:38,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857142899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:38,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:38,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 07:58:38,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331861276] [2021-06-05 07:58:38,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:58:38,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:38,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:58:38,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:58:38,956 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) [2021-06-05 07:58:39,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:39,345 INFO L93 Difference]: Finished difference Result 3756 states and 9717 transitions. [2021-06-05 07:58:39,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:58:39,346 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 [2021-06-05 07:58:39,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:39,349 INFO L225 Difference]: With dead ends: 3756 [2021-06-05 07:58:39,350 INFO L226 Difference]: Without dead ends: 3486 [2021-06-05 07:58:39,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 376.2ms TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:58:39,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3486 states. [2021-06-05 07:58:39,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3486 to 2713. [2021-06-05 07:58:39,376 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) [2021-06-05 07:58:39,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7503 transitions. [2021-06-05 07:58:39,380 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7503 transitions. Word has length 100 [2021-06-05 07:58:39,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:39,380 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7503 transitions. [2021-06-05 07:58:39,380 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) [2021-06-05 07:58:39,380 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7503 transitions. [2021-06-05 07:58:39,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:58:39,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:39,382 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] [2021-06-05 07:58:39,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 07:58:39,582 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:39,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:39,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1669020744, now seen corresponding path program 94 times [2021-06-05 07:58:39,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:39,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239860895] [2021-06-05 07:58:39,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:39,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:39,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:39,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239860895] [2021-06-05 07:58:39,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239860895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:39,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514572441] [2021-06-05 07:58:39,718 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 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 [2021-06-05 07:58:39,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:58:39,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:39,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:58:39,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:39,904 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:39,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514572441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:39,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:39,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 07:58:39,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487927176] [2021-06-05 07:58:39,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:58:39,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:39,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:58:39,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:58:39,905 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) [2021-06-05 07:58:40,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:40,393 INFO L93 Difference]: Finished difference Result 3781 states and 9842 transitions. [2021-06-05 07:58:40,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:58:40,393 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 [2021-06-05 07:58:40,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:40,397 INFO L225 Difference]: With dead ends: 3781 [2021-06-05 07:58:40,397 INFO L226 Difference]: Without dead ends: 3511 [2021-06-05 07:58:40,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 467.4ms TimeCoverageRelationStatistics Valid=494, Invalid=1576, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:58:40,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2021-06-05 07:58:40,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2788. [2021-06-05 07:58:40,421 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) [2021-06-05 07:58:40,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7728 transitions. [2021-06-05 07:58:40,424 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7728 transitions. Word has length 100 [2021-06-05 07:58:40,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:40,424 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7728 transitions. [2021-06-05 07:58:40,424 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) [2021-06-05 07:58:40,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7728 transitions. [2021-06-05 07:58:40,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:58:40,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:40,426 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] [2021-06-05 07:58:40,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:40,627 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:40,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:40,627 INFO L82 PathProgramCache]: Analyzing trace with hash -210307146, now seen corresponding path program 95 times [2021-06-05 07:58:40,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:40,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409133912] [2021-06-05 07:58:40,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:40,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:40,751 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:40,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:40,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409133912] [2021-06-05 07:58:40,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409133912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:40,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719332354] [2021-06-05 07:58:40,751 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 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 [2021-06-05 07:58:40,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 07:58:40,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:40,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:58:40,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:40,926 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:40,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719332354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:40,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:40,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 07:58:40,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362560224] [2021-06-05 07:58:40,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:58:40,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:40,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:58:40,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:58:40,927 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) [2021-06-05 07:58:41,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:41,347 INFO L93 Difference]: Finished difference Result 3806 states and 9967 transitions. [2021-06-05 07:58:41,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:58:41,347 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 [2021-06-05 07:58:41,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:41,350 INFO L225 Difference]: With dead ends: 3806 [2021-06-05 07:58:41,350 INFO L226 Difference]: Without dead ends: 3536 [2021-06-05 07:58:41,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 377.8ms TimeCoverageRelationStatistics Valid=474, Invalid=1418, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:58:41,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3536 states. [2021-06-05 07:58:41,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3536 to 2863. [2021-06-05 07:58:41,375 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) [2021-06-05 07:58:41,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7953 transitions. [2021-06-05 07:58:41,379 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7953 transitions. Word has length 100 [2021-06-05 07:58:41,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:41,379 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7953 transitions. [2021-06-05 07:58:41,379 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) [2021-06-05 07:58:41,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7953 transitions. [2021-06-05 07:58:41,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:58:41,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:41,381 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] [2021-06-05 07:58:41,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 07:58:41,583 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:41,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:41,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1820012166, now seen corresponding path program 96 times [2021-06-05 07:58:41,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:41,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996635530] [2021-06-05 07:58:41,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:41,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:41,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:41,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996635530] [2021-06-05 07:58:41,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996635530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:41,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882470380] [2021-06-05 07:58:41,720 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 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 [2021-06-05 07:58:41,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 07:58:41,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:41,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:58:41,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:41,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882470380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:41,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:41,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 07:58:41,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031561269] [2021-06-05 07:58:41,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:58:41,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:41,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:58:41,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:58:41,910 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) [2021-06-05 07:58:42,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:42,407 INFO L93 Difference]: Finished difference Result 3831 states and 10092 transitions. [2021-06-05 07:58:42,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:58:42,407 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 [2021-06-05 07:58:42,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:42,411 INFO L225 Difference]: With dead ends: 3831 [2021-06-05 07:58:42,411 INFO L226 Difference]: Without dead ends: 3561 [2021-06-05 07:58:42,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 467.9ms TimeCoverageRelationStatistics Valid=476, Invalid=1594, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:58:42,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-06-05 07:58:42,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2938. [2021-06-05 07:58:42,441 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) [2021-06-05 07:58:42,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8178 transitions. [2021-06-05 07:58:42,444 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8178 transitions. Word has length 100 [2021-06-05 07:58:42,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:42,444 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8178 transitions. [2021-06-05 07:58:42,445 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) [2021-06-05 07:58:42,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8178 transitions. [2021-06-05 07:58:42,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:58:42,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:42,447 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] [2021-06-05 07:58:42,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:42,647 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:42,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:42,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1860715660, now seen corresponding path program 97 times [2021-06-05 07:58:42,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:42,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747679494] [2021-06-05 07:58:42,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:42,766 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:42,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:42,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747679494] [2021-06-05 07:58:42,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747679494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:42,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872735756] [2021-06-05 07:58:42,767 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 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 [2021-06-05 07:58:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:42,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:58:42,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:42,941 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:42,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872735756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:42,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:42,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 07:58:42,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551550697] [2021-06-05 07:58:42,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:58:42,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:42,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:58:42,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:58:42,942 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) [2021-06-05 07:58:43,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:43,381 INFO L93 Difference]: Finished difference Result 3856 states and 10217 transitions. [2021-06-05 07:58:43,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:58:43,382 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 [2021-06-05 07:58:43,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:43,385 INFO L225 Difference]: With dead ends: 3856 [2021-06-05 07:58:43,386 INFO L226 Difference]: Without dead ends: 3586 [2021-06-05 07:58:43,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 401.9ms TimeCoverageRelationStatistics Valid=549, Invalid=1521, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:58:43,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-06-05 07:58:43,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 3013. [2021-06-05 07:58:43,429 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) [2021-06-05 07:58:43,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8403 transitions. [2021-06-05 07:58:43,433 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8403 transitions. Word has length 100 [2021-06-05 07:58:43,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:43,433 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8403 transitions. [2021-06-05 07:58:43,433 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) [2021-06-05 07:58:43,433 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8403 transitions. [2021-06-05 07:58:43,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:58:43,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:43,435 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] [2021-06-05 07:58:43,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-05 07:58:43,635 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:43,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:43,636 INFO L82 PathProgramCache]: Analyzing trace with hash 719009348, now seen corresponding path program 98 times [2021-06-05 07:58:43,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:43,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715218405] [2021-06-05 07:58:43,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:43,757 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:43,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:43,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715218405] [2021-06-05 07:58:43,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715218405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:43,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420736926] [2021-06-05 07:58:43,757 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 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 [2021-06-05 07:58:43,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:58:43,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:43,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:58:43,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:43,962 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:43,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420736926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:43,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:43,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 07:58:43,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603010515] [2021-06-05 07:58:43,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:58:43,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:43,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:58:43,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:58:43,963 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) [2021-06-05 07:58:44,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:44,550 INFO L93 Difference]: Finished difference Result 3941 states and 10507 transitions. [2021-06-05 07:58:44,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 07:58:44,550 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 [2021-06-05 07:58:44,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:44,554 INFO L225 Difference]: With dead ends: 3941 [2021-06-05 07:58:44,555 INFO L226 Difference]: Without dead ends: 3671 [2021-06-05 07:58:44,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 540.6ms TimeCoverageRelationStatistics Valid=644, Invalid=1806, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:58:44,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2021-06-05 07:58:44,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 3088. [2021-06-05 07:58:44,585 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) [2021-06-05 07:58:44,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8648 transitions. [2021-06-05 07:58:44,589 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8648 transitions. Word has length 100 [2021-06-05 07:58:44,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:44,589 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8648 transitions. [2021-06-05 07:58:44,589 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) [2021-06-05 07:58:44,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8648 transitions. [2021-06-05 07:58:44,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:58:44,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:44,591 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] [2021-06-05 07:58:44,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:44,792 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:44,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:44,792 INFO L82 PathProgramCache]: Analyzing trace with hash -313638254, now seen corresponding path program 99 times [2021-06-05 07:58:44,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:44,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029671090] [2021-06-05 07:58:44,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:44,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:44,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:44,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029671090] [2021-06-05 07:58:44,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029671090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:44,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025780708] [2021-06-05 07:58:44,936 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 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 [2021-06-05 07:58:45,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 07:58:45,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:45,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:58:45,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:45,133 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:45,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025780708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:45,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:45,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 07:58:45,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615192335] [2021-06-05 07:58:45,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:58:45,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:45,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:58:45,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:58:45,134 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) [2021-06-05 07:58:45,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:45,604 INFO L93 Difference]: Finished difference Result 4708 states and 12681 transitions. [2021-06-05 07:58:45,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:58:45,604 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 [2021-06-05 07:58:45,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:45,608 INFO L225 Difference]: With dead ends: 4708 [2021-06-05 07:58:45,608 INFO L226 Difference]: Without dead ends: 4438 [2021-06-05 07:58:45,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 446.3ms TimeCoverageRelationStatistics Valid=641, Invalid=1615, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:58:45,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2021-06-05 07:58:45,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 3268. [2021-06-05 07:58:45,636 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) [2021-06-05 07:58:45,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3268 states to 3268 states and 9207 transitions. [2021-06-05 07:58:45,662 INFO L78 Accepts]: Start accepts. Automaton has 3268 states and 9207 transitions. Word has length 100 [2021-06-05 07:58:45,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:45,662 INFO L482 AbstractCegarLoop]: Abstraction has 3268 states and 9207 transitions. [2021-06-05 07:58:45,662 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) [2021-06-05 07:58:45,662 INFO L276 IsEmpty]: Start isEmpty. Operand 3268 states and 9207 transitions. [2021-06-05 07:58:45,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 07:58:45,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:45,664 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] [2021-06-05 07:58:45,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 07:58:45,865 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:45,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:45,865 INFO L82 PathProgramCache]: Analyzing trace with hash -291295004, now seen corresponding path program 100 times [2021-06-05 07:58:45,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:45,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354062325] [2021-06-05 07:58:45,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:45,984 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:45,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:45,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354062325] [2021-06-05 07:58:45,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354062325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:45,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723628900] [2021-06-05 07:58:45,984 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 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 [2021-06-05 07:58:46,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:58:46,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:46,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:58:46,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:46,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723628900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:46,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:46,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 07:58:46,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769456577] [2021-06-05 07:58:46,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:58:46,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:46,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:58:46,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:58:46,178 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) [2021-06-05 07:58:46,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:46,851 INFO L93 Difference]: Finished difference Result 4651 states and 12541 transitions. [2021-06-05 07:58:46,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 07:58:46,852 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 [2021-06-05 07:58:46,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:46,856 INFO L225 Difference]: With dead ends: 4651 [2021-06-05 07:58:46,856 INFO L226 Difference]: Without dead ends: 4076 [2021-06-05 07:58:46,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 629.7ms TimeCoverageRelationStatistics Valid=804, Invalid=2276, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:58:46,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-05 07:58:46,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-06-05 07:58:46,884 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) [2021-06-05 07:58:46,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 07:58:46,888 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 100 [2021-06-05 07:58:46,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:46,888 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 07:58:46,888 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) [2021-06-05 07:58:46,889 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 07:58:46,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 07:58:46,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:46,891 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] [2021-06-05 07:58:47,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 07:58:47,093 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:47,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:47,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1356878341, now seen corresponding path program 101 times [2021-06-05 07:58:47,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:47,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244039677] [2021-06-05 07:58:47,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:47,290 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:47,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:47,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244039677] [2021-06-05 07:58:47,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244039677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:47,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659108604] [2021-06-05 07:58:47,290 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 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 [2021-06-05 07:58:47,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 07:58:47,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:47,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:58:47,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:47,499 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:47,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659108604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:47,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:47,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 07:58:47,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282377104] [2021-06-05 07:58:47,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:58:47,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:47,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:58:47,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:58:47,501 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) [2021-06-05 07:58:47,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:47,823 INFO L93 Difference]: Finished difference Result 4346 states and 11497 transitions. [2021-06-05 07:58:47,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:58:47,823 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 [2021-06-05 07:58:47,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:47,828 INFO L225 Difference]: With dead ends: 4346 [2021-06-05 07:58:47,828 INFO L226 Difference]: Without dead ends: 4076 [2021-06-05 07:58:47,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 382.3ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:58:47,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-05 07:58:47,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-06-05 07:58:47,860 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) [2021-06-05 07:58:47,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 07:58:47,888 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 07:58:47,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:47,888 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 07:58:47,888 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) [2021-06-05 07:58:47,888 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 07:58:47,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 07:58:47,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:47,891 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] [2021-06-05 07:58:48,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 07:58:48,091 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:48,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:48,091 INFO L82 PathProgramCache]: Analyzing trace with hash -547826485, now seen corresponding path program 102 times [2021-06-05 07:58:48,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:48,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187426545] [2021-06-05 07:58:48,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:48,272 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:48,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:48,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187426545] [2021-06-05 07:58:48,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187426545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:48,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228105103] [2021-06-05 07:58:48,273 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 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 [2021-06-05 07:58:48,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 07:58:48,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:48,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:58:48,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:48,490 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:48,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228105103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:48,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:48,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 07:58:48,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081283977] [2021-06-05 07:58:48,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:48,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:48,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:48,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:48,491 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) [2021-06-05 07:58:48,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:48,868 INFO L93 Difference]: Finished difference Result 4641 states and 12087 transitions. [2021-06-05 07:58:48,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:58:48,869 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 [2021-06-05 07:58:48,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:48,873 INFO L225 Difference]: With dead ends: 4641 [2021-06-05 07:58:48,873 INFO L226 Difference]: Without dead ends: 4371 [2021-06-05 07:58:48,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 418.1ms TimeCoverageRelationStatistics Valid=465, Invalid=1427, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:58:48,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2021-06-05 07:58:48,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 3303. [2021-06-05 07:58:48,902 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) [2021-06-05 07:58:48,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 07:58:48,906 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 07:58:48,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:48,906 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 07:58:48,907 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) [2021-06-05 07:58:48,907 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 07:58:48,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 07:58:48,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:48,909 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] [2021-06-05 07:58:49,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:49,109 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:49,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:49,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1939776583, now seen corresponding path program 103 times [2021-06-05 07:58:49,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:49,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926806400] [2021-06-05 07:58:49,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:49,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:49,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926806400] [2021-06-05 07:58:49,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926806400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:49,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621263267] [2021-06-05 07:58:49,269 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 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 [2021-06-05 07:58:49,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:49,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:58:49,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:49,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621263267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:49,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:49,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 07:58:49,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390193482] [2021-06-05 07:58:49,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:58:49,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:49,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:58:49,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:58:49,465 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) [2021-06-05 07:58:49,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:49,809 INFO L93 Difference]: Finished difference Result 4596 states and 11997 transitions. [2021-06-05 07:58:49,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:58:49,809 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 [2021-06-05 07:58:49,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:49,813 INFO L225 Difference]: With dead ends: 4596 [2021-06-05 07:58:49,813 INFO L226 Difference]: Without dead ends: 4326 [2021-06-05 07:58:49,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 379.8ms TimeCoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:58:49,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-06-05 07:58:49,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3303. [2021-06-05 07:58:49,841 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) [2021-06-05 07:58:49,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 07:58:49,845 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 07:58:49,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:49,846 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 07:58:49,846 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) [2021-06-05 07:58:49,846 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 07:58:49,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 07:58:49,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:49,848 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] [2021-06-05 07:58:50,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 07:58:50,048 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:50,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:50,049 INFO L82 PathProgramCache]: Analyzing trace with hash 2110113417, now seen corresponding path program 104 times [2021-06-05 07:58:50,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:50,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114952263] [2021-06-05 07:58:50,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:50,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:50,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:50,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114952263] [2021-06-05 07:58:50,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114952263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:50,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413950875] [2021-06-05 07:58:50,228 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 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 [2021-06-05 07:58:50,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:58:50,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:50,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:58:50,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:50,449 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:50,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413950875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:50,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:50,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 07:58:50,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314254730] [2021-06-05 07:58:50,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:50,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:50,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:50,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:50,450 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) [2021-06-05 07:58:50,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:50,874 INFO L93 Difference]: Finished difference Result 4546 states and 11897 transitions. [2021-06-05 07:58:50,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:58:50,874 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 [2021-06-05 07:58:50,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:50,878 INFO L225 Difference]: With dead ends: 4546 [2021-06-05 07:58:50,878 INFO L226 Difference]: Without dead ends: 4276 [2021-06-05 07:58:50,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 476.4ms TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:58:50,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2021-06-05 07:58:50,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 3303. [2021-06-05 07:58:50,907 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) [2021-06-05 07:58:50,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 07:58:50,911 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 07:58:50,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:50,911 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 07:58:50,911 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) [2021-06-05 07:58:50,911 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 07:58:50,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 07:58:50,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:50,913 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] [2021-06-05 07:58:51,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:51,114 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:51,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:51,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1733263095, now seen corresponding path program 105 times [2021-06-05 07:58:51,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:51,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366154837] [2021-06-05 07:58:51,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:51,258 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:51,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:51,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366154837] [2021-06-05 07:58:51,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366154837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:51,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190905737] [2021-06-05 07:58:51,259 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 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 [2021-06-05 07:58:51,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 07:58:51,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:51,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:58:51,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:51,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190905737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:51,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:51,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 07:58:51,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600850783] [2021-06-05 07:58:51,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:58:51,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:51,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:58:51,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:58:51,462 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) [2021-06-05 07:58:51,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:51,871 INFO L93 Difference]: Finished difference Result 4496 states and 11797 transitions. [2021-06-05 07:58:51,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:58:51,871 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 [2021-06-05 07:58:51,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:51,875 INFO L225 Difference]: With dead ends: 4496 [2021-06-05 07:58:51,876 INFO L226 Difference]: Without dead ends: 4226 [2021-06-05 07:58:51,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 404.2ms TimeCoverageRelationStatistics Valid=506, Invalid=1564, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:58:51,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-05 07:58:51,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3303. [2021-06-05 07:58:51,903 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) [2021-06-05 07:58:51,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 07:58:51,907 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 07:58:51,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:51,907 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 07:58:51,907 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) [2021-06-05 07:58:51,907 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 07:58:51,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 07:58:51,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:51,910 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] [2021-06-05 07:58:52,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 07:58:52,111 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:52,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:52,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1234948665, now seen corresponding path program 106 times [2021-06-05 07:58:52,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:52,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204508605] [2021-06-05 07:58:52,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:52,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:52,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204508605] [2021-06-05 07:58:52,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204508605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:52,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249057754] [2021-06-05 07:58:52,262 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 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 [2021-06-05 07:58:52,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:58:52,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:52,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:58:52,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:52,491 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:52,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249057754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:52,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:52,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 07:58:52,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126327308] [2021-06-05 07:58:52,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:52,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:52,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:52,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:52,492 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) [2021-06-05 07:58:52,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:52,958 INFO L93 Difference]: Finished difference Result 4446 states and 11697 transitions. [2021-06-05 07:58:52,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:58:52,959 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 [2021-06-05 07:58:52,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:52,963 INFO L225 Difference]: With dead ends: 4446 [2021-06-05 07:58:52,963 INFO L226 Difference]: Without dead ends: 4176 [2021-06-05 07:58:52,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 479.4ms TimeCoverageRelationStatistics Valid=531, Invalid=1725, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:58:52,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-05 07:58:52,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3303. [2021-06-05 07:58:52,990 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) [2021-06-05 07:58:52,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 07:58:52,994 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 07:58:52,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:52,994 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 07:58:52,994 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) [2021-06-05 07:58:52,994 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 07:58:52,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 07:58:52,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:52,996 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] [2021-06-05 07:58:53,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 07:58:53,197 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:53,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:53,197 INFO L82 PathProgramCache]: Analyzing trace with hash -780732491, now seen corresponding path program 107 times [2021-06-05 07:58:53,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:53,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237584266] [2021-06-05 07:58:53,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:53,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:53,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237584266] [2021-06-05 07:58:53,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237584266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:53,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726322074] [2021-06-05 07:58:53,345 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 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 [2021-06-05 07:58:53,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 07:58:53,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:53,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:58:53,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:53,541 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:53,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726322074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:53,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:53,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 07:58:53,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836049936] [2021-06-05 07:58:53,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:58:53,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:53,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:58:53,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:58:53,542 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) [2021-06-05 07:58:53,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:53,970 INFO L93 Difference]: Finished difference Result 4396 states and 11597 transitions. [2021-06-05 07:58:53,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:58:53,970 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 [2021-06-05 07:58:53,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:53,974 INFO L225 Difference]: With dead ends: 4396 [2021-06-05 07:58:53,974 INFO L226 Difference]: Without dead ends: 4126 [2021-06-05 07:58:53,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 413.0ms TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:58:53,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-05 07:58:54,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 3303. [2021-06-05 07:58:54,002 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) [2021-06-05 07:58:54,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 07:58:54,006 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 07:58:54,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:54,006 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 07:58:54,006 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) [2021-06-05 07:58:54,006 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 07:58:54,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 07:58:54,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:54,008 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] [2021-06-05 07:58:54,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-06-05 07:58:54,209 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:54,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:54,209 INFO L82 PathProgramCache]: Analyzing trace with hash 218163845, now seen corresponding path program 108 times [2021-06-05 07:58:54,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:54,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593652697] [2021-06-05 07:58:54,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:54,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:54,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593652697] [2021-06-05 07:58:54,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593652697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:54,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406591756] [2021-06-05 07:58:54,354 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 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 [2021-06-05 07:58:54,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 07:58:54,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:54,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:58:54,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:54,584 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:54,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406591756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:54,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:54,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 07:58:54,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244164708] [2021-06-05 07:58:54,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:54,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:54,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:54,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:54,585 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) [2021-06-05 07:58:55,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:55,113 INFO L93 Difference]: Finished difference Result 4346 states and 11497 transitions. [2021-06-05 07:58:55,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:58:55,113 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 [2021-06-05 07:58:55,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:55,117 INFO L225 Difference]: With dead ends: 4346 [2021-06-05 07:58:55,117 INFO L226 Difference]: Without dead ends: 4076 [2021-06-05 07:58:55,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 512.4ms TimeCoverageRelationStatistics Valid=588, Invalid=1862, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:58:55,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-05 07:58:55,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-06-05 07:58:55,145 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) [2021-06-05 07:58:55,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 07:58:55,150 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 07:58:55,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:55,150 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 07:58:55,150 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) [2021-06-05 07:58:55,150 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 07:58:55,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 07:58:55,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:55,152 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] [2021-06-05 07:58:55,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:55,353 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:55,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:55,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1661164045, now seen corresponding path program 109 times [2021-06-05 07:58:55,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:55,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96859342] [2021-06-05 07:58:55,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:55,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:55,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:55,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96859342] [2021-06-05 07:58:55,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96859342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:55,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008616700] [2021-06-05 07:58:55,486 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 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 [2021-06-05 07:58:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:55,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:58:55,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:55,689 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:55,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008616700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:55,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:55,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 07:58:55,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181087677] [2021-06-05 07:58:55,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:58:55,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:55,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:58:55,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:58:55,690 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) [2021-06-05 07:58:56,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:56,148 INFO L93 Difference]: Finished difference Result 4296 states and 11397 transitions. [2021-06-05 07:58:56,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:58:56,148 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 [2021-06-05 07:58:56,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:56,152 INFO L225 Difference]: With dead ends: 4296 [2021-06-05 07:58:56,152 INFO L226 Difference]: Without dead ends: 4026 [2021-06-05 07:58:56,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 435.0ms TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:58:56,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-06-05 07:58:56,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 3303. [2021-06-05 07:58:56,179 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) [2021-06-05 07:58:56,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 07:58:56,183 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 07:58:56,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:56,183 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 07:58:56,183 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) [2021-06-05 07:58:56,183 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 07:58:56,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 07:58:56,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:56,185 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] [2021-06-05 07:58:56,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:56,386 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:56,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:56,386 INFO L82 PathProgramCache]: Analyzing trace with hash 369155267, now seen corresponding path program 110 times [2021-06-05 07:58:56,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:56,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375136435] [2021-06-05 07:58:56,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:56,537 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:56,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:56,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375136435] [2021-06-05 07:58:56,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375136435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:56,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684427199] [2021-06-05 07:58:56,537 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 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 [2021-06-05 07:58:56,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:58:56,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:56,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:58:56,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:56,771 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:56,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684427199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:56,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:56,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 07:58:56,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336747365] [2021-06-05 07:58:56,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:56,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:56,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:56,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:56,772 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) [2021-06-05 07:58:57,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:57,335 INFO L93 Difference]: Finished difference Result 4246 states and 11297 transitions. [2021-06-05 07:58:57,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 07:58:57,336 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 [2021-06-05 07:58:57,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:57,339 INFO L225 Difference]: With dead ends: 4246 [2021-06-05 07:58:57,339 INFO L226 Difference]: Without dead ends: 3976 [2021-06-05 07:58:57,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 544.0ms TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:58:57,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3976 states. [2021-06-05 07:58:57,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3976 to 3303. [2021-06-05 07:58:57,364 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) [2021-06-05 07:58:57,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 07:58:57,368 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 07:58:57,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:57,368 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 07:58:57,369 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) [2021-06-05 07:58:57,369 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 07:58:57,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 07:58:57,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:57,371 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] [2021-06-05 07:58:57,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:58:57,571 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:57,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:57,572 INFO L82 PathProgramCache]: Analyzing trace with hash 983394737, now seen corresponding path program 111 times [2021-06-05 07:58:57,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:57,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294108959] [2021-06-05 07:58:57,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:57,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:57,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294108959] [2021-06-05 07:58:57,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294108959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:57,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773007601] [2021-06-05 07:58:57,703 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 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 [2021-06-05 07:58:57,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 07:58:57,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:57,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:58:57,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:57,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773007601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:57,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:57,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 07:58:57,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860096453] [2021-06-05 07:58:57,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:58:57,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:57,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:58:57,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:58:57,898 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) [2021-06-05 07:58:58,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:58,378 INFO L93 Difference]: Finished difference Result 4196 states and 11197 transitions. [2021-06-05 07:58:58,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:58:58,379 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 [2021-06-05 07:58:58,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:58,383 INFO L225 Difference]: With dead ends: 4196 [2021-06-05 07:58:58,383 INFO L226 Difference]: Without dead ends: 3926 [2021-06-05 07:58:58,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 457.5ms TimeCoverageRelationStatistics Valid=719, Invalid=1933, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:58:58,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-06-05 07:58:58,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3303. [2021-06-05 07:58:58,411 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) [2021-06-05 07:58:58,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 07:58:58,415 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 07:58:58,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:58,415 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 07:58:58,415 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) [2021-06-05 07:58:58,415 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 07:58:58,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 07:58:58,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:58,417 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] [2021-06-05 07:58:58,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 07:58:58,621 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:58,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:58,621 INFO L82 PathProgramCache]: Analyzing trace with hash -731847551, now seen corresponding path program 112 times [2021-06-05 07:58:58,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:58,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017563403] [2021-06-05 07:58:58,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:58,753 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:58,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:58,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017563403] [2021-06-05 07:58:58,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017563403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:58,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455671384] [2021-06-05 07:58:58,754 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 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 [2021-06-05 07:58:58,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:58:58,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:58:58,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:58:58,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:58:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:58,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455671384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:58,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:58:58,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 07:58:58,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165460689] [2021-06-05 07:58:58,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:58:58,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:58:58,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:58:58,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:58:58,975 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) [2021-06-05 07:58:59,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:58:59,598 INFO L93 Difference]: Finished difference Result 4206 states and 11247 transitions. [2021-06-05 07:58:59,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:58:59,598 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 [2021-06-05 07:58:59,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:58:59,602 INFO L225 Difference]: With dead ends: 4206 [2021-06-05 07:58:59,602 INFO L226 Difference]: Without dead ends: 3936 [2021-06-05 07:58:59,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 582.0ms TimeCoverageRelationStatistics Valid=750, Invalid=2112, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:58:59,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3936 states. [2021-06-05 07:58:59,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3936 to 3303. [2021-06-05 07:58:59,628 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) [2021-06-05 07:58:59,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9288 transitions. [2021-06-05 07:58:59,632 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9288 transitions. Word has length 105 [2021-06-05 07:58:59,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:58:59,632 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9288 transitions. [2021-06-05 07:58:59,632 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) [2021-06-05 07:58:59,632 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9288 transitions. [2021-06-05 07:58:59,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 07:58:59,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:58:59,634 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] [2021-06-05 07:58:59,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 07:58:59,835 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:58:59,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:58:59,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1764495153, now seen corresponding path program 113 times [2021-06-05 07:58:59,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:58:59,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428481538] [2021-06-05 07:58:59,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:58:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:58:59,965 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:58:59,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:58:59,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428481538] [2021-06-05 07:58:59,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428481538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:58:59,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871921270] [2021-06-05 07:58:59,965 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 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 [2021-06-05 07:59:00,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 07:59:00,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:00,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:59:00,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:00,152 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:00,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871921270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:00,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:00,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 07:59:00,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727653360] [2021-06-05 07:59:00,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:59:00,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:00,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:59:00,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:59:00,153 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) [2021-06-05 07:59:00,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:00,681 INFO L93 Difference]: Finished difference Result 4948 states and 13371 transitions. [2021-06-05 07:59:00,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:59:00,681 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 [2021-06-05 07:59:00,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:00,685 INFO L225 Difference]: With dead ends: 4948 [2021-06-05 07:59:00,685 INFO L226 Difference]: Without dead ends: 4678 [2021-06-05 07:59:00,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 483.0ms TimeCoverageRelationStatistics Valid=823, Invalid=2039, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:59:00,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4678 states. [2021-06-05 07:59:00,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4678 to 3483. [2021-06-05 07:59:00,717 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) [2021-06-05 07:59:00,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 9847 transitions. [2021-06-05 07:59:00,721 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 9847 transitions. Word has length 105 [2021-06-05 07:59:00,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:00,722 INFO L482 AbstractCegarLoop]: Abstraction has 3483 states and 9847 transitions. [2021-06-05 07:59:00,722 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) [2021-06-05 07:59:00,722 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 9847 transitions. [2021-06-05 07:59:00,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 07:59:00,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:00,724 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] [2021-06-05 07:59:00,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 07:59:00,924 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:00,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:00,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1742151903, now seen corresponding path program 114 times [2021-06-05 07:59:00,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:00,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602074373] [2021-06-05 07:59:00,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:00,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:01,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:01,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602074373] [2021-06-05 07:59:01,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602074373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:01,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544226694] [2021-06-05 07:59:01,055 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 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 [2021-06-05 07:59:01,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 07:59:01,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:01,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:59:01,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:01,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544226694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:01,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:01,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 07:59:01,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788152206] [2021-06-05 07:59:01,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:59:01,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:01,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:59:01,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:59:01,279 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) [2021-06-05 07:59:01,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:01,957 INFO L93 Difference]: Finished difference Result 4816 states and 13036 transitions. [2021-06-05 07:59:01,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 07:59:01,957 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 [2021-06-05 07:59:01,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:01,961 INFO L225 Difference]: With dead ends: 4816 [2021-06-05 07:59:01,961 INFO L226 Difference]: Without dead ends: 4241 [2021-06-05 07:59:01,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 640.8ms TimeCoverageRelationStatistics Valid=830, Invalid=2592, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:59:01,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4241 states. [2021-06-05 07:59:01,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4241 to 2324. [2021-06-05 07:59:01,982 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) [2021-06-05 07:59:01,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 6356 transitions. [2021-06-05 07:59:01,985 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 6356 transitions. Word has length 105 [2021-06-05 07:59:01,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:01,985 INFO L482 AbstractCegarLoop]: Abstraction has 2324 states and 6356 transitions. [2021-06-05 07:59:01,985 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) [2021-06-05 07:59:01,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 6356 transitions. [2021-06-05 07:59:01,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:59:01,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:01,987 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] [2021-06-05 07:59:02,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 07:59:02,187 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:02,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:02,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1657780875, now seen corresponding path program 115 times [2021-06-05 07:59:02,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:02,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448723794] [2021-06-05 07:59:02,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:02,366 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:02,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:02,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448723794] [2021-06-05 07:59:02,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448723794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:02,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138472099] [2021-06-05 07:59:02,366 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 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 [2021-06-05 07:59:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:02,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:59:02,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:02,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138472099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:02,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:02,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 25 [2021-06-05 07:59:02,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731868259] [2021-06-05 07:59:02,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:59:02,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:02,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:59:02,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:59:02,605 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) [2021-06-05 07:59:03,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:03,009 INFO L93 Difference]: Finished difference Result 3364 states and 8756 transitions. [2021-06-05 07:59:03,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:59:03,010 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 [2021-06-05 07:59:03,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:03,013 INFO L225 Difference]: With dead ends: 3364 [2021-06-05 07:59:03,013 INFO L226 Difference]: Without dead ends: 3030 [2021-06-05 07:59:03,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 446.8ms TimeCoverageRelationStatistics Valid=572, Invalid=1590, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:59:03,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-06-05 07:59:03,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 2409. [2021-06-05 07:59:03,035 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) [2021-06-05 07:59:03,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 6526 transitions. [2021-06-05 07:59:03,038 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 6526 transitions. Word has length 110 [2021-06-05 07:59:03,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:03,038 INFO L482 AbstractCegarLoop]: Abstraction has 2409 states and 6526 transitions. [2021-06-05 07:59:03,038 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) [2021-06-05 07:59:03,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 6526 transitions. [2021-06-05 07:59:03,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:59:03,040 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:03,040 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] [2021-06-05 07:59:03,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:03,241 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:03,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:03,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1067386545, now seen corresponding path program 116 times [2021-06-05 07:59:03,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:03,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098828263] [2021-06-05 07:59:03,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:03,440 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:03,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:03,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098828263] [2021-06-05 07:59:03,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098828263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:03,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185831759] [2021-06-05 07:59:03,441 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 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 [2021-06-05 07:59:03,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:59:03,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:03,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:59:03,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:03,654 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:03,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185831759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:03,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:03,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 07:59:03,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701002692] [2021-06-05 07:59:03,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:59:03,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:03,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:59:03,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:59:03,656 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) [2021-06-05 07:59:04,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:04,018 INFO L93 Difference]: Finished difference Result 4086 states and 10137 transitions. [2021-06-05 07:59:04,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:59:04,019 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 [2021-06-05 07:59:04,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:04,022 INFO L225 Difference]: With dead ends: 4086 [2021-06-05 07:59:04,022 INFO L226 Difference]: Without dead ends: 3816 [2021-06-05 07:59:04,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 407.9ms TimeCoverageRelationStatistics Valid=446, Invalid=1194, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:59:04,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2021-06-05 07:59:04,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 2553. [2021-06-05 07:59:04,044 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) [2021-06-05 07:59:04,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 6943 transitions. [2021-06-05 07:59:04,047 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 6943 transitions. Word has length 110 [2021-06-05 07:59:04,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:04,047 INFO L482 AbstractCegarLoop]: Abstraction has 2553 states and 6943 transitions. [2021-06-05 07:59:04,047 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) [2021-06-05 07:59:04,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 6943 transitions. [2021-06-05 07:59:04,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:59:04,049 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:04,050 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] [2021-06-05 07:59:04,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:04,253 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:04,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:04,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1447830497, now seen corresponding path program 117 times [2021-06-05 07:59:04,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:04,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806696173] [2021-06-05 07:59:04,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:04,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:04,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806696173] [2021-06-05 07:59:04,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806696173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:04,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939967470] [2021-06-05 07:59:04,439 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 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 [2021-06-05 07:59:04,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 07:59:04,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:04,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:59:04,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:04,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939967470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:04,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:04,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 07:59:04,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018378333] [2021-06-05 07:59:04,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:59:04,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:04,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:59:04,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:59:04,666 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) [2021-06-05 07:59:05,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:05,043 INFO L93 Difference]: Finished difference Result 4046 states and 10132 transitions. [2021-06-05 07:59:05,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:59:05,043 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 [2021-06-05 07:59:05,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:05,047 INFO L225 Difference]: With dead ends: 4046 [2021-06-05 07:59:05,047 INFO L226 Difference]: Without dead ends: 3776 [2021-06-05 07:59:05,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 443.0ms TimeCoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:59:05,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2021-06-05 07:59:05,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 2628. [2021-06-05 07:59:05,077 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) [2021-06-05 07:59:05,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2628 states to 2628 states and 7168 transitions. [2021-06-05 07:59:05,081 INFO L78 Accepts]: Start accepts. Automaton has 2628 states and 7168 transitions. Word has length 110 [2021-06-05 07:59:05,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:05,081 INFO L482 AbstractCegarLoop]: Abstraction has 2628 states and 7168 transitions. [2021-06-05 07:59:05,082 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) [2021-06-05 07:59:05,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2628 states and 7168 transitions. [2021-06-05 07:59:05,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:59:05,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:05,084 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] [2021-06-05 07:59:05,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 07:59:05,289 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:05,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:05,289 INFO L82 PathProgramCache]: Analyzing trace with hash -823455347, now seen corresponding path program 118 times [2021-06-05 07:59:05,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:05,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321902347] [2021-06-05 07:59:05,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:05,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:05,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321902347] [2021-06-05 07:59:05,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321902347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:05,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33834569] [2021-06-05 07:59:05,465 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 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 [2021-06-05 07:59:05,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:59:05,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:05,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:59:05,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:05,705 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:05,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33834569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:05,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:05,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 07:59:05,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261600309] [2021-06-05 07:59:05,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:59:05,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:05,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:59:05,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:59:05,706 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) [2021-06-05 07:59:06,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:06,047 INFO L93 Difference]: Finished difference Result 4096 states and 10307 transitions. [2021-06-05 07:59:06,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:59:06,047 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 [2021-06-05 07:59:06,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:06,051 INFO L225 Difference]: With dead ends: 4096 [2021-06-05 07:59:06,051 INFO L226 Difference]: Without dead ends: 3826 [2021-06-05 07:59:06,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 393.2ms TimeCoverageRelationStatistics Valid=454, Invalid=1352, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:59:06,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3826 states. [2021-06-05 07:59:06,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3826 to 2703. [2021-06-05 07:59:06,075 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) [2021-06-05 07:59:06,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2703 states to 2703 states and 7393 transitions. [2021-06-05 07:59:06,079 INFO L78 Accepts]: Start accepts. Automaton has 2703 states and 7393 transitions. Word has length 110 [2021-06-05 07:59:06,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:06,079 INFO L482 AbstractCegarLoop]: Abstraction has 2703 states and 7393 transitions. [2021-06-05 07:59:06,079 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) [2021-06-05 07:59:06,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2703 states and 7393 transitions. [2021-06-05 07:59:06,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:59:06,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:06,081 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] [2021-06-05 07:59:06,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:06,282 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:06,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:06,282 INFO L82 PathProgramCache]: Analyzing trace with hash -14403491, now seen corresponding path program 119 times [2021-06-05 07:59:06,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:06,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548384144] [2021-06-05 07:59:06,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:06,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:06,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548384144] [2021-06-05 07:59:06,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548384144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:06,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309067402] [2021-06-05 07:59:06,457 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 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 [2021-06-05 07:59:06,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 07:59:06,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:06,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:59:06,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:06,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309067402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:06,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:06,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 07:59:06,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775823151] [2021-06-05 07:59:06,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:59:06,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:06,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:59:06,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:59:06,681 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) [2021-06-05 07:59:07,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:07,127 INFO L93 Difference]: Finished difference Result 4121 states and 10432 transitions. [2021-06-05 07:59:07,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:59:07,128 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 [2021-06-05 07:59:07,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:07,131 INFO L225 Difference]: With dead ends: 4121 [2021-06-05 07:59:07,131 INFO L226 Difference]: Without dead ends: 3851 [2021-06-05 07:59:07,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 476.4ms TimeCoverageRelationStatistics Valid=523, Invalid=1639, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:59:07,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3851 states. [2021-06-05 07:59:07,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3851 to 2778. [2021-06-05 07:59:07,156 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) [2021-06-05 07:59:07,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2778 states to 2778 states and 7618 transitions. [2021-06-05 07:59:07,159 INFO L78 Accepts]: Start accepts. Automaton has 2778 states and 7618 transitions. Word has length 110 [2021-06-05 07:59:07,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:07,159 INFO L482 AbstractCegarLoop]: Abstraction has 2778 states and 7618 transitions. [2021-06-05 07:59:07,159 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) [2021-06-05 07:59:07,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2778 states and 7618 transitions. [2021-06-05 07:59:07,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:59:07,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:07,161 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] [2021-06-05 07:59:07,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:07,362 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:07,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:07,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1406353589, now seen corresponding path program 120 times [2021-06-05 07:59:07,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:07,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219453336] [2021-06-05 07:59:07,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:07,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:07,525 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:07,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:07,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219453336] [2021-06-05 07:59:07,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219453336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:07,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571096493] [2021-06-05 07:59:07,526 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 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 [2021-06-05 07:59:07,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 07:59:07,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:07,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:59:07,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:07,755 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:07,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571096493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:07,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:07,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 07:59:07,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613987868] [2021-06-05 07:59:07,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:59:07,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:07,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:59:07,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:59:07,756 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) [2021-06-05 07:59:08,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:08,136 INFO L93 Difference]: Finished difference Result 4146 states and 10557 transitions. [2021-06-05 07:59:08,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:59:08,136 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 [2021-06-05 07:59:08,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:08,140 INFO L225 Difference]: With dead ends: 4146 [2021-06-05 07:59:08,140 INFO L226 Difference]: Without dead ends: 3876 [2021-06-05 07:59:08,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 407.5ms TimeCoverageRelationStatistics Valid=478, Invalid=1502, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:59:08,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3876 states. [2021-06-05 07:59:08,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3876 to 2853. [2021-06-05 07:59:08,166 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) [2021-06-05 07:59:08,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 7843 transitions. [2021-06-05 07:59:08,170 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 7843 transitions. Word has length 110 [2021-06-05 07:59:08,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:08,170 INFO L482 AbstractCegarLoop]: Abstraction has 2853 states and 7843 transitions. [2021-06-05 07:59:08,170 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) [2021-06-05 07:59:08,170 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 7843 transitions. [2021-06-05 07:59:08,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:59:08,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:08,172 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] [2021-06-05 07:59:08,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:08,376 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:08,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:08,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1651430885, now seen corresponding path program 121 times [2021-06-05 07:59:08,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:08,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923123540] [2021-06-05 07:59:08,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:08,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:08,542 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:08,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:08,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923123540] [2021-06-05 07:59:08,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923123540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:08,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642366108] [2021-06-05 07:59:08,543 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 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 [2021-06-05 07:59:08,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:08,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:59:08,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:08,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642366108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:08,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:08,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 07:59:08,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148651616] [2021-06-05 07:59:08,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:59:08,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:08,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:59:08,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:59:08,773 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) [2021-06-05 07:59:09,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:09,268 INFO L93 Difference]: Finished difference Result 4171 states and 10682 transitions. [2021-06-05 07:59:09,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:59:09,268 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 [2021-06-05 07:59:09,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:09,272 INFO L225 Difference]: With dead ends: 4171 [2021-06-05 07:59:09,272 INFO L226 Difference]: Without dead ends: 3901 [2021-06-05 07:59:09,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 511.2ms TimeCoverageRelationStatistics Valid=555, Invalid=1797, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:59:09,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3901 states. [2021-06-05 07:59:09,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3901 to 2928. [2021-06-05 07:59:09,299 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) [2021-06-05 07:59:09,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 8068 transitions. [2021-06-05 07:59:09,302 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 8068 transitions. Word has length 110 [2021-06-05 07:59:09,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:09,302 INFO L482 AbstractCegarLoop]: Abstraction has 2928 states and 8068 transitions. [2021-06-05 07:59:09,303 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) [2021-06-05 07:59:09,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 8068 transitions. [2021-06-05 07:59:09,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:59:09,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:09,305 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] [2021-06-05 07:59:09,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 07:59:09,509 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:09,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:09,509 INFO L82 PathProgramCache]: Analyzing trace with hash -2028281207, now seen corresponding path program 122 times [2021-06-05 07:59:09,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:09,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323567123] [2021-06-05 07:59:09,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:09,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:09,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323567123] [2021-06-05 07:59:09,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323567123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:09,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133847948] [2021-06-05 07:59:09,669 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 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 [2021-06-05 07:59:09,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:59:09,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:09,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:59:09,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:09,872 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:09,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133847948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:09,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:09,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 07:59:09,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452023736] [2021-06-05 07:59:09,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:59:09,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:09,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:59:09,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:59:09,873 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) [2021-06-05 07:59:10,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:10,296 INFO L93 Difference]: Finished difference Result 4196 states and 10807 transitions. [2021-06-05 07:59:10,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:59:10,296 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 [2021-06-05 07:59:10,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:10,300 INFO L225 Difference]: With dead ends: 4196 [2021-06-05 07:59:10,300 INFO L226 Difference]: Without dead ends: 3926 [2021-06-05 07:59:10,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 439.7ms TimeCoverageRelationStatistics Valid=518, Invalid=1644, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:59:10,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-06-05 07:59:10,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3003. [2021-06-05 07:59:10,326 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) [2021-06-05 07:59:10,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 8293 transitions. [2021-06-05 07:59:10,330 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 8293 transitions. Word has length 110 [2021-06-05 07:59:10,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:10,330 INFO L482 AbstractCegarLoop]: Abstraction has 3003 states and 8293 transitions. [2021-06-05 07:59:10,330 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) [2021-06-05 07:59:10,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 8293 transitions. [2021-06-05 07:59:10,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:59:10,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:10,332 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] [2021-06-05 07:59:10,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 07:59:10,533 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:10,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:10,533 INFO L82 PathProgramCache]: Analyzing trace with hash -701525671, now seen corresponding path program 123 times [2021-06-05 07:59:10,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:10,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055771524] [2021-06-05 07:59:10,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:10,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:10,690 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:10,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:10,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055771524] [2021-06-05 07:59:10,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055771524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:10,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682104353] [2021-06-05 07:59:10,690 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 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 [2021-06-05 07:59:10,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 07:59:10,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:10,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 07:59:10,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:10,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682104353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:10,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:10,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 07:59:10,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993006780] [2021-06-05 07:59:10,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:59:10,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:10,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:59:10,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:59:10,909 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) [2021-06-05 07:59:11,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:11,414 INFO L93 Difference]: Finished difference Result 4221 states and 10932 transitions. [2021-06-05 07:59:11,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:59:11,414 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 [2021-06-05 07:59:11,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:11,418 INFO L225 Difference]: With dead ends: 4221 [2021-06-05 07:59:11,418 INFO L226 Difference]: Without dead ends: 3951 [2021-06-05 07:59:11,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 507.5ms TimeCoverageRelationStatistics Valid=528, Invalid=1824, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:59:11,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3951 states. [2021-06-05 07:59:11,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3951 to 3078. [2021-06-05 07:59:11,447 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) [2021-06-05 07:59:11,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3078 states to 3078 states and 8518 transitions. [2021-06-05 07:59:11,450 INFO L78 Accepts]: Start accepts. Automaton has 3078 states and 8518 transitions. Word has length 110 [2021-06-05 07:59:11,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:11,451 INFO L482 AbstractCegarLoop]: Abstraction has 3078 states and 8518 transitions. [2021-06-05 07:59:11,451 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) [2021-06-05 07:59:11,451 INFO L276 IsEmpty]: Start isEmpty. Operand 3078 states and 8518 transitions. [2021-06-05 07:59:11,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:59:11,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:11,453 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] [2021-06-05 07:59:11,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 07:59:11,653 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:11,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:11,653 INFO L82 PathProgramCache]: Analyzing trace with hash -247309497, now seen corresponding path program 124 times [2021-06-05 07:59:11,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:11,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290532378] [2021-06-05 07:59:11,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:11,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:11,800 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:11,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:11,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290532378] [2021-06-05 07:59:11,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290532378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:11,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006308803] [2021-06-05 07:59:11,800 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 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 [2021-06-05 07:59:11,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:59:11,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:11,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:59:11,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:12,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006308803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:12,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:12,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 07:59:12,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359132004] [2021-06-05 07:59:12,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:59:12,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:12,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:59:12,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:59:12,015 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) [2021-06-05 07:59:12,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:12,468 INFO L93 Difference]: Finished difference Result 4246 states and 11057 transitions. [2021-06-05 07:59:12,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:59:12,468 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 [2021-06-05 07:59:12,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:12,472 INFO L225 Difference]: With dead ends: 4246 [2021-06-05 07:59:12,472 INFO L226 Difference]: Without dead ends: 3976 [2021-06-05 07:59:12,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 457.4ms TimeCoverageRelationStatistics Valid=574, Invalid=1778, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:59:12,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3976 states. [2021-06-05 07:59:12,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3976 to 3153. [2021-06-05 07:59:12,501 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) [2021-06-05 07:59:12,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 8743 transitions. [2021-06-05 07:59:12,505 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 8743 transitions. Word has length 110 [2021-06-05 07:59:12,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:12,505 INFO L482 AbstractCegarLoop]: Abstraction has 3153 states and 8743 transitions. [2021-06-05 07:59:12,505 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) [2021-06-05 07:59:12,505 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 8743 transitions. [2021-06-05 07:59:12,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:59:12,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:12,507 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] [2021-06-05 07:59:12,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 07:59:12,707 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:12,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:12,708 INFO L82 PathProgramCache]: Analyzing trace with hash 751586839, now seen corresponding path program 125 times [2021-06-05 07:59:12,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:12,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17707434] [2021-06-05 07:59:12,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:12,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:12,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:12,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17707434] [2021-06-05 07:59:12,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17707434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:12,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394987279] [2021-06-05 07:59:12,860 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 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 [2021-06-05 07:59:12,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 07:59:12,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:12,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:59:12,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:13,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394987279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:13,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:13,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 07:59:13,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267048070] [2021-06-05 07:59:13,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:59:13,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:13,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:59:13,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:59:13,107 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) [2021-06-05 07:59:13,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:13,697 INFO L93 Difference]: Finished difference Result 4271 states and 11182 transitions. [2021-06-05 07:59:13,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 07:59:13,698 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 [2021-06-05 07:59:13,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:13,702 INFO L225 Difference]: With dead ends: 4271 [2021-06-05 07:59:13,702 INFO L226 Difference]: Without dead ends: 4001 [2021-06-05 07:59:13,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 582.1ms TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:59:13,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-06-05 07:59:13,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 3228. [2021-06-05 07:59:13,731 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) [2021-06-05 07:59:13,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3228 states to 3228 states and 8968 transitions. [2021-06-05 07:59:13,735 INFO L78 Accepts]: Start accepts. Automaton has 3228 states and 8968 transitions. Word has length 110 [2021-06-05 07:59:13,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:13,735 INFO L482 AbstractCegarLoop]: Abstraction has 3228 states and 8968 transitions. [2021-06-05 07:59:13,735 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) [2021-06-05 07:59:13,735 INFO L276 IsEmpty]: Start isEmpty. Operand 3228 states and 8968 transitions. [2021-06-05 07:59:13,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:59:13,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:13,737 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] [2021-06-05 07:59:13,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 07:59:13,945 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:13,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:13,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1127741051, now seen corresponding path program 126 times [2021-06-05 07:59:13,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:13,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936378663] [2021-06-05 07:59:13,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:14,112 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:14,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:14,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936378663] [2021-06-05 07:59:14,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936378663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:14,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582293723] [2021-06-05 07:59:14,113 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 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 [2021-06-05 07:59:14,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 07:59:14,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:14,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:59:14,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:14,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582293723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:14,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:14,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 07:59:14,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468380748] [2021-06-05 07:59:14,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:59:14,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:14,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:59:14,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:59:14,325 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) [2021-06-05 07:59:14,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:14,815 INFO L93 Difference]: Finished difference Result 4296 states and 11307 transitions. [2021-06-05 07:59:14,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:59:14,815 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 [2021-06-05 07:59:14,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:14,819 INFO L225 Difference]: With dead ends: 4296 [2021-06-05 07:59:14,819 INFO L226 Difference]: Without dead ends: 4026 [2021-06-05 07:59:14,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 490.8ms TimeCoverageRelationStatistics Valid=646, Invalid=1904, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:59:14,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-06-05 07:59:14,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 3303. [2021-06-05 07:59:14,850 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) [2021-06-05 07:59:14,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9193 transitions. [2021-06-05 07:59:14,853 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9193 transitions. Word has length 110 [2021-06-05 07:59:14,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:14,854 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9193 transitions. [2021-06-05 07:59:14,854 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) [2021-06-05 07:59:14,854 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9193 transitions. [2021-06-05 07:59:14,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:59:14,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:14,856 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] [2021-06-05 07:59:15,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:15,057 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:15,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:15,057 INFO L82 PathProgramCache]: Analyzing trace with hash 902578261, now seen corresponding path program 127 times [2021-06-05 07:59:15,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:15,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896767408] [2021-06-05 07:59:15,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:15,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:15,205 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:15,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:15,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896767408] [2021-06-05 07:59:15,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896767408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:15,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225759834] [2021-06-05 07:59:15,206 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 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 [2021-06-05 07:59:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:15,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:59:15,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:15,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225759834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:15,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:15,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 07:59:15,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028111094] [2021-06-05 07:59:15,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:59:15,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:15,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:59:15,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:59:15,417 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) [2021-06-05 07:59:16,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:16,054 INFO L93 Difference]: Finished difference Result 4321 states and 11432 transitions. [2021-06-05 07:59:16,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:59:16,055 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 [2021-06-05 07:59:16,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:16,059 INFO L225 Difference]: With dead ends: 4321 [2021-06-05 07:59:16,059 INFO L226 Difference]: Without dead ends: 4051 [2021-06-05 07:59:16,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 621.3ms TimeCoverageRelationStatistics Valid=747, Invalid=2223, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:59:16,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-05 07:59:16,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 3378. [2021-06-05 07:59:16,090 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) [2021-06-05 07:59:16,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 9418 transitions. [2021-06-05 07:59:16,094 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 9418 transitions. Word has length 110 [2021-06-05 07:59:16,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:16,095 INFO L482 AbstractCegarLoop]: Abstraction has 3378 states and 9418 transitions. [2021-06-05 07:59:16,095 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) [2021-06-05 07:59:16,095 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 9418 transitions. [2021-06-05 07:59:16,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:59:16,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:16,098 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] [2021-06-05 07:59:16,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 07:59:16,305 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:16,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:16,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1516817731, now seen corresponding path program 128 times [2021-06-05 07:59:16,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:16,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863038843] [2021-06-05 07:59:16,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:16,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:16,447 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:16,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:16,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863038843] [2021-06-05 07:59:16,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863038843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:16,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917708998] [2021-06-05 07:59:16,447 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 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 [2021-06-05 07:59:16,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:59:16,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:16,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:59:16,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:16,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917708998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:16,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:16,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 07:59:16,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395636015] [2021-06-05 07:59:16,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:59:16,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:16,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:59:16,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:59:16,665 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) [2021-06-05 07:59:17,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:17,177 INFO L93 Difference]: Finished difference Result 4391 states and 11677 transitions. [2021-06-05 07:59:17,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:59:17,177 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 [2021-06-05 07:59:17,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:17,182 INFO L225 Difference]: With dead ends: 4391 [2021-06-05 07:59:17,182 INFO L226 Difference]: Without dead ends: 4121 [2021-06-05 07:59:17,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 500.8ms TimeCoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:59:17,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4121 states. [2021-06-05 07:59:17,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4121 to 3453. [2021-06-05 07:59:17,215 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) [2021-06-05 07:59:17,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 9658 transitions. [2021-06-05 07:59:17,219 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 9658 transitions. Word has length 110 [2021-06-05 07:59:17,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:17,219 INFO L482 AbstractCegarLoop]: Abstraction has 3453 states and 9658 transitions. [2021-06-05 07:59:17,219 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) [2021-06-05 07:59:17,219 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 9658 transitions. [2021-06-05 07:59:17,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:59:17,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:17,222 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] [2021-06-05 07:59:17,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:17,423 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:17,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:17,423 INFO L82 PathProgramCache]: Analyzing trace with hash -198424557, now seen corresponding path program 129 times [2021-06-05 07:59:17,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:17,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066229543] [2021-06-05 07:59:17,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:17,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:17,585 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:17,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:17,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066229543] [2021-06-05 07:59:17,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066229543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:17,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898114532] [2021-06-05 07:59:17,586 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 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 [2021-06-05 07:59:17,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 07:59:17,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:17,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:59:17,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:17,800 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:17,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898114532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:17,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:17,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 07:59:17,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281636632] [2021-06-05 07:59:17,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:59:17,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:17,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:59:17,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:59:17,805 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) [2021-06-05 07:59:18,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:18,491 INFO L93 Difference]: Finished difference Result 4969 states and 13303 transitions. [2021-06-05 07:59:18,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 07:59:18,491 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 [2021-06-05 07:59:18,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:18,496 INFO L225 Difference]: With dead ends: 4969 [2021-06-05 07:59:18,496 INFO L226 Difference]: Without dead ends: 4346 [2021-06-05 07:59:18,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 646.0ms TimeCoverageRelationStatistics Valid=737, Invalid=2455, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:59:18,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4346 states. [2021-06-05 07:59:18,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4346 to 3528. [2021-06-05 07:59:18,529 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) [2021-06-05 07:59:18,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9888 transitions. [2021-06-05 07:59:18,534 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9888 transitions. Word has length 110 [2021-06-05 07:59:18,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:18,534 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9888 transitions. [2021-06-05 07:59:18,534 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) [2021-06-05 07:59:18,534 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9888 transitions. [2021-06-05 07:59:18,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:59:18,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:18,537 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] [2021-06-05 07:59:18,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:18,741 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:18,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:18,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1231072159, now seen corresponding path program 130 times [2021-06-05 07:59:18,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:18,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489500982] [2021-06-05 07:59:18,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:18,940 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:18,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:18,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489500982] [2021-06-05 07:59:18,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489500982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:18,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074644421] [2021-06-05 07:59:18,940 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 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 [2021-06-05 07:59:19,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:59:19,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:19,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:59:19,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:19,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074644421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:19,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:19,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 07:59:19,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268285494] [2021-06-05 07:59:19,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:59:19,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:19,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:59:19,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:59:19,165 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) [2021-06-05 07:59:19,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:19,795 INFO L93 Difference]: Finished difference Result 5198 states and 14021 transitions. [2021-06-05 07:59:19,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:59:19,795 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 [2021-06-05 07:59:19,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:19,800 INFO L225 Difference]: With dead ends: 5198 [2021-06-05 07:59:19,800 INFO L226 Difference]: Without dead ends: 4928 [2021-06-05 07:59:19,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 584.5ms TimeCoverageRelationStatistics Valid=839, Invalid=2131, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:59:19,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2021-06-05 07:59:19,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 3708. [2021-06-05 07:59:19,831 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) [2021-06-05 07:59:19,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 10447 transitions. [2021-06-05 07:59:19,835 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 10447 transitions. Word has length 110 [2021-06-05 07:59:19,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:19,835 INFO L482 AbstractCegarLoop]: Abstraction has 3708 states and 10447 transitions. [2021-06-05 07:59:19,835 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) [2021-06-05 07:59:19,835 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 10447 transitions. [2021-06-05 07:59:19,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 07:59:19,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:19,838 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] [2021-06-05 07:59:20,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:20,038 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:20,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:20,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1208728909, now seen corresponding path program 131 times [2021-06-05 07:59:20,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:20,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657850276] [2021-06-05 07:59:20,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:20,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:20,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:20,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657850276] [2021-06-05 07:59:20,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657850276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:20,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078673024] [2021-06-05 07:59:20,198 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 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 [2021-06-05 07:59:20,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 07:59:20,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:20,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:59:20,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:20,405 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:20,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078673024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:20,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:20,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 07:59:20,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702560478] [2021-06-05 07:59:20,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:59:20,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:20,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:59:20,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:59:20,406 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) [2021-06-05 07:59:21,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:21,212 INFO L93 Difference]: Finished difference Result 5021 states and 13521 transitions. [2021-06-05 07:59:21,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:59:21,212 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 [2021-06-05 07:59:21,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:21,216 INFO L225 Difference]: With dead ends: 5021 [2021-06-05 07:59:21,216 INFO L226 Difference]: Without dead ends: 4446 [2021-06-05 07:59:21,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 766.6ms TimeCoverageRelationStatistics Valid=997, Invalid=2785, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 07:59:21,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4446 states. [2021-06-05 07:59:21,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4446 to 2603. [2021-06-05 07:59:21,240 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) [2021-06-05 07:59:21,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7118 transitions. [2021-06-05 07:59:21,243 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7118 transitions. Word has length 110 [2021-06-05 07:59:21,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:21,244 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7118 transitions. [2021-06-05 07:59:21,244 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) [2021-06-05 07:59:21,244 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7118 transitions. [2021-06-05 07:59:21,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:59:21,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:21,245 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] [2021-06-05 07:59:21,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:21,446 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:21,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:21,446 INFO L82 PathProgramCache]: Analyzing trace with hash -207372468, now seen corresponding path program 132 times [2021-06-05 07:59:21,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:21,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371340752] [2021-06-05 07:59:21,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:21,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:21,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:21,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371340752] [2021-06-05 07:59:21,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371340752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:21,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041345307] [2021-06-05 07:59:21,662 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 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 [2021-06-05 07:59:21,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 07:59:21,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:21,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:59:21,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:21,928 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:21,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041345307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:21,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:21,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 07:59:21,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242468746] [2021-06-05 07:59:21,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:59:21,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:21,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:59:21,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:59:21,929 INFO L87 Difference]: Start difference. First operand 2603 states and 7118 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) [2021-06-05 07:59:22,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:22,331 INFO L93 Difference]: Finished difference Result 3821 states and 9757 transitions. [2021-06-05 07:59:22,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:59:22,332 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 [2021-06-05 07:59:22,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:22,335 INFO L225 Difference]: With dead ends: 3821 [2021-06-05 07:59:22,335 INFO L226 Difference]: Without dead ends: 3551 [2021-06-05 07:59:22,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 467.4ms TimeCoverageRelationStatistics Valid=508, Invalid=1472, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:59:22,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2021-06-05 07:59:22,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 2678. [2021-06-05 07:59:22,360 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) [2021-06-05 07:59:22,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7343 transitions. [2021-06-05 07:59:22,363 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7343 transitions. Word has length 115 [2021-06-05 07:59:22,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:22,363 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7343 transitions. [2021-06-05 07:59:22,363 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) [2021-06-05 07:59:22,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7343 transitions. [2021-06-05 07:59:22,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:59:22,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:22,365 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] [2021-06-05 07:59:22,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 07:59:22,565 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:22,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:22,566 INFO L82 PathProgramCache]: Analyzing trace with hash -587816420, now seen corresponding path program 133 times [2021-06-05 07:59:22,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:22,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454914930] [2021-06-05 07:59:22,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:22,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:22,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454914930] [2021-06-05 07:59:22,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454914930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:22,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215055745] [2021-06-05 07:59:22,775 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 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 [2021-06-05 07:59:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:22,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:59:22,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:23,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215055745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:23,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:23,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 07:59:23,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283990333] [2021-06-05 07:59:23,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:23,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:23,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:23,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:23,009 INFO L87 Difference]: Start difference. First operand 2678 states and 7343 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:23,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:23,431 INFO L93 Difference]: Finished difference Result 4241 states and 10672 transitions. [2021-06-05 07:59:23,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:59:23,432 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:59:23,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:23,435 INFO L225 Difference]: With dead ends: 4241 [2021-06-05 07:59:23,435 INFO L226 Difference]: Without dead ends: 3971 [2021-06-05 07:59:23,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 494.3ms TimeCoverageRelationStatistics Valid=560, Invalid=1696, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:59:23,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2021-06-05 07:59:23,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 2753. [2021-06-05 07:59:23,459 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) [2021-06-05 07:59:23,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7568 transitions. [2021-06-05 07:59:23,462 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7568 transitions. Word has length 115 [2021-06-05 07:59:23,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:23,463 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7568 transitions. [2021-06-05 07:59:23,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:23,463 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7568 transitions. [2021-06-05 07:59:23,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:59:23,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:23,465 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] [2021-06-05 07:59:23,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 07:59:23,665 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:23,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:23,665 INFO L82 PathProgramCache]: Analyzing trace with hash 36558730, now seen corresponding path program 134 times [2021-06-05 07:59:23,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:23,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983333436] [2021-06-05 07:59:23,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:23,846 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:23,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:23,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983333436] [2021-06-05 07:59:23,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983333436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:23,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608997021] [2021-06-05 07:59:23,847 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 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 [2021-06-05 07:59:23,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:59:23,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:23,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:59:23,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:24,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608997021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:24,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:24,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 07:59:24,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928569116] [2021-06-05 07:59:24,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:59:24,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:24,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:59:24,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:59:24,062 INFO L87 Difference]: Start difference. First operand 2753 states and 7568 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) [2021-06-05 07:59:24,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:24,455 INFO L93 Difference]: Finished difference Result 4271 states and 10807 transitions. [2021-06-05 07:59:24,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:59:24,456 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 [2021-06-05 07:59:24,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:24,460 INFO L225 Difference]: With dead ends: 4271 [2021-06-05 07:59:24,460 INFO L226 Difference]: Without dead ends: 4001 [2021-06-05 07:59:24,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 438.5ms TimeCoverageRelationStatistics Valid=560, Invalid=1696, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:59:24,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-06-05 07:59:24,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 2828. [2021-06-05 07:59:24,484 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) [2021-06-05 07:59:24,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7793 transitions. [2021-06-05 07:59:24,488 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7793 transitions. Word has length 115 [2021-06-05 07:59:24,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:24,488 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7793 transitions. [2021-06-05 07:59:24,488 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) [2021-06-05 07:59:24,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7793 transitions. [2021-06-05 07:59:24,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:59:24,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:24,490 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] [2021-06-05 07:59:24,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 07:59:24,690 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:24,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:24,691 INFO L82 PathProgramCache]: Analyzing trace with hash 845610586, now seen corresponding path program 135 times [2021-06-05 07:59:24,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:24,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865545641] [2021-06-05 07:59:24,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:24,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:24,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865545641] [2021-06-05 07:59:24,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865545641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:24,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54433772] [2021-06-05 07:59:24,877 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 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 [2021-06-05 07:59:24,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 07:59:24,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:24,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 07:59:24,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:25,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54433772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:25,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:25,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 07:59:25,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320554691] [2021-06-05 07:59:25,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:25,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:25,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:25,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:25,111 INFO L87 Difference]: Start difference. First operand 2828 states and 7793 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:25,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:25,604 INFO L93 Difference]: Finished difference Result 4296 states and 10932 transitions. [2021-06-05 07:59:25,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:59:25,604 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:59:25,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:25,607 INFO L225 Difference]: With dead ends: 4296 [2021-06-05 07:59:25,607 INFO L226 Difference]: Without dead ends: 4026 [2021-06-05 07:59:25,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 529.3ms TimeCoverageRelationStatistics Valid=577, Invalid=1873, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:59:25,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-06-05 07:59:25,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 2903. [2021-06-05 07:59:25,632 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) [2021-06-05 07:59:25,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 8018 transitions. [2021-06-05 07:59:25,636 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 8018 transitions. Word has length 115 [2021-06-05 07:59:25,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:25,636 INFO L482 AbstractCegarLoop]: Abstraction has 2903 states and 8018 transitions. [2021-06-05 07:59:25,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:25,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 8018 transitions. [2021-06-05 07:59:25,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:59:25,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:25,638 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] [2021-06-05 07:59:25,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 07:59:25,839 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:25,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:25,839 INFO L82 PathProgramCache]: Analyzing trace with hash -546339512, now seen corresponding path program 136 times [2021-06-05 07:59:25,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:25,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498046052] [2021-06-05 07:59:25,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:26,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:26,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498046052] [2021-06-05 07:59:26,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498046052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:26,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723788681] [2021-06-05 07:59:26,021 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 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 [2021-06-05 07:59:26,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:59:26,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:26,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:59:26,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:26,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723788681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:26,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:26,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 07:59:26,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209462023] [2021-06-05 07:59:26,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:59:26,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:26,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:59:26,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:59:26,271 INFO L87 Difference]: Start difference. First operand 2903 states and 8018 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) [2021-06-05 07:59:26,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:26,706 INFO L93 Difference]: Finished difference Result 4321 states and 11057 transitions. [2021-06-05 07:59:26,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:59:26,706 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 [2021-06-05 07:59:26,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:26,710 INFO L225 Difference]: With dead ends: 4321 [2021-06-05 07:59:26,710 INFO L226 Difference]: Without dead ends: 4051 [2021-06-05 07:59:26,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 459.8ms TimeCoverageRelationStatistics Valid=597, Invalid=1853, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:59:26,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-05 07:59:26,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 2978. [2021-06-05 07:59:26,737 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) [2021-06-05 07:59:26,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 8243 transitions. [2021-06-05 07:59:26,740 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 8243 transitions. Word has length 115 [2021-06-05 07:59:26,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:26,740 INFO L482 AbstractCegarLoop]: Abstraction has 2978 states and 8243 transitions. [2021-06-05 07:59:26,740 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) [2021-06-05 07:59:26,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 8243 transitions. [2021-06-05 07:59:26,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:59:26,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:26,743 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] [2021-06-05 07:59:26,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:26,943 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:26,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:26,943 INFO L82 PathProgramCache]: Analyzing trace with hash -791416808, now seen corresponding path program 137 times [2021-06-05 07:59:26,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:26,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662272386] [2021-06-05 07:59:26,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:27,132 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:27,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:27,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662272386] [2021-06-05 07:59:27,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662272386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:27,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699381188] [2021-06-05 07:59:27,133 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 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 [2021-06-05 07:59:27,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 07:59:27,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:27,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:59:27,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:27,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699381188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:27,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:27,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 07:59:27,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423899835] [2021-06-05 07:59:27,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:27,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:27,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:27,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:27,389 INFO L87 Difference]: Start difference. First operand 2978 states and 8243 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:27,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:27,949 INFO L93 Difference]: Finished difference Result 4346 states and 11182 transitions. [2021-06-05 07:59:27,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:59:27,950 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:59:27,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:27,953 INFO L225 Difference]: With dead ends: 4346 [2021-06-05 07:59:27,953 INFO L226 Difference]: Without dead ends: 4076 [2021-06-05 07:59:27,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 596.7ms TimeCoverageRelationStatistics Valid=622, Invalid=2030, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:59:27,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-05 07:59:27,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3053. [2021-06-05 07:59:27,979 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) [2021-06-05 07:59:27,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 8468 transitions. [2021-06-05 07:59:27,983 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 8468 transitions. Word has length 115 [2021-06-05 07:59:27,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:27,983 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 8468 transitions. [2021-06-05 07:59:27,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:27,983 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 8468 transitions. [2021-06-05 07:59:27,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:59:27,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:27,985 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] [2021-06-05 07:59:28,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 07:59:28,186 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:28,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:28,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1168267130, now seen corresponding path program 138 times [2021-06-05 07:59:28,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:28,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625031407] [2021-06-05 07:59:28,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:28,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:28,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625031407] [2021-06-05 07:59:28,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625031407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:28,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69394719] [2021-06-05 07:59:28,358 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 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 [2021-06-05 07:59:28,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 07:59:28,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:28,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:59:28,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:28,573 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:28,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69394719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:28,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:28,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 07:59:28,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651267030] [2021-06-05 07:59:28,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:59:28,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:28,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:59:28,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:59:28,574 INFO L87 Difference]: Start difference. First operand 3053 states and 8468 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) [2021-06-05 07:59:29,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:29,031 INFO L93 Difference]: Finished difference Result 4371 states and 11307 transitions. [2021-06-05 07:59:29,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:59:29,032 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 [2021-06-05 07:59:29,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:29,036 INFO L225 Difference]: With dead ends: 4371 [2021-06-05 07:59:29,036 INFO L226 Difference]: Without dead ends: 4101 [2021-06-05 07:59:29,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 480.2ms TimeCoverageRelationStatistics Valid=650, Invalid=2002, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:59:29,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4101 states. [2021-06-05 07:59:29,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4101 to 3128. [2021-06-05 07:59:29,062 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) [2021-06-05 07:59:29,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 8693 transitions. [2021-06-05 07:59:29,066 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 8693 transitions. Word has length 115 [2021-06-05 07:59:29,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:29,066 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 8693 transitions. [2021-06-05 07:59:29,066 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) [2021-06-05 07:59:29,066 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 8693 transitions. [2021-06-05 07:59:29,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:59:29,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:29,068 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] [2021-06-05 07:59:29,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-06-05 07:59:29,273 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:29,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:29,273 INFO L82 PathProgramCache]: Analyzing trace with hash 158488406, now seen corresponding path program 139 times [2021-06-05 07:59:29,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:29,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140233980] [2021-06-05 07:59:29,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:29,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:29,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140233980] [2021-06-05 07:59:29,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140233980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:29,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478488598] [2021-06-05 07:59:29,467 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 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 [2021-06-05 07:59:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:29,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:59:29,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:29,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478488598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:29,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:29,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 07:59:29,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000501159] [2021-06-05 07:59:29,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:29,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:29,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:29,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:29,689 INFO L87 Difference]: Start difference. First operand 3128 states and 8693 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:30,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:30,276 INFO L93 Difference]: Finished difference Result 4396 states and 11432 transitions. [2021-06-05 07:59:30,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 07:59:30,277 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:59:30,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:30,281 INFO L225 Difference]: With dead ends: 4396 [2021-06-05 07:59:30,281 INFO L226 Difference]: Without dead ends: 4126 [2021-06-05 07:59:30,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 602.2ms TimeCoverageRelationStatistics Valid=677, Invalid=2185, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:59:30,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-05 07:59:30,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 3203. [2021-06-05 07:59:30,313 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) [2021-06-05 07:59:30,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8918 transitions. [2021-06-05 07:59:30,319 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8918 transitions. Word has length 115 [2021-06-05 07:59:30,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:30,319 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8918 transitions. [2021-06-05 07:59:30,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:30,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8918 transitions. [2021-06-05 07:59:30,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:59:30,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:30,323 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] [2021-06-05 07:59:30,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:30,544 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:30,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:30,545 INFO L82 PathProgramCache]: Analyzing trace with hash 612704580, now seen corresponding path program 140 times [2021-06-05 07:59:30,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:30,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554563582] [2021-06-05 07:59:30,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:30,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:30,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554563582] [2021-06-05 07:59:30,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554563582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:30,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183236521] [2021-06-05 07:59:30,701 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 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 [2021-06-05 07:59:30,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:59:30,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:30,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:59:30,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:30,905 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:30,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183236521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:30,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:30,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 07:59:30,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541376754] [2021-06-05 07:59:30,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:59:30,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:30,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:59:30,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:59:30,907 INFO L87 Difference]: Start difference. First operand 3203 states and 8918 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) [2021-06-05 07:59:31,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:31,405 INFO L93 Difference]: Finished difference Result 4421 states and 11557 transitions. [2021-06-05 07:59:31,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:59:31,405 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 [2021-06-05 07:59:31,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:31,409 INFO L225 Difference]: With dead ends: 4421 [2021-06-05 07:59:31,409 INFO L226 Difference]: Without dead ends: 4151 [2021-06-05 07:59:31,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 497.1ms TimeCoverageRelationStatistics Valid=719, Invalid=2143, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:59:31,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-06-05 07:59:31,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3278. [2021-06-05 07:59:31,440 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) [2021-06-05 07:59:31,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 9143 transitions. [2021-06-05 07:59:31,444 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 9143 transitions. Word has length 115 [2021-06-05 07:59:31,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:31,444 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 9143 transitions. [2021-06-05 07:59:31,444 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) [2021-06-05 07:59:31,444 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 9143 transitions. [2021-06-05 07:59:31,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:59:31,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:31,446 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] [2021-06-05 07:59:31,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable152 [2021-06-05 07:59:31,647 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:31,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:31,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1611600916, now seen corresponding path program 141 times [2021-06-05 07:59:31,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:31,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348891965] [2021-06-05 07:59:31,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:31,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:31,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348891965] [2021-06-05 07:59:31,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348891965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:31,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034550728] [2021-06-05 07:59:31,809 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 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 [2021-06-05 07:59:31,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 07:59:31,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:31,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:59:31,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:32,057 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:32,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034550728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:32,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:32,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 07:59:32,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553202783] [2021-06-05 07:59:32,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:32,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:32,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:32,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:32,058 INFO L87 Difference]: Start difference. First operand 3278 states and 9143 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:32,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:32,684 INFO L93 Difference]: Finished difference Result 4446 states and 11682 transitions. [2021-06-05 07:59:32,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:59:32,685 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:59:32,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:32,689 INFO L225 Difference]: With dead ends: 4446 [2021-06-05 07:59:32,689 INFO L226 Difference]: Without dead ends: 4176 [2021-06-05 07:59:32,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 618.5ms TimeCoverageRelationStatistics Valid=715, Invalid=2365, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:59:32,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-05 07:59:32,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3353. [2021-06-05 07:59:32,721 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) [2021-06-05 07:59:32,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9368 transitions. [2021-06-05 07:59:32,725 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9368 transitions. Word has length 115 [2021-06-05 07:59:32,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:32,725 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9368 transitions. [2021-06-05 07:59:32,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:32,725 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9368 transitions. [2021-06-05 07:59:32,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:59:32,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:32,728 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] [2021-06-05 07:59:32,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:32,928 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:32,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:32,928 INFO L82 PathProgramCache]: Analyzing trace with hash -267726974, now seen corresponding path program 142 times [2021-06-05 07:59:32,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:32,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197593065] [2021-06-05 07:59:32,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:32,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:33,082 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:33,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:33,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197593065] [2021-06-05 07:59:33,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197593065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:33,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57575063] [2021-06-05 07:59:33,082 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 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 [2021-06-05 07:59:33,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:59:33,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:33,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:59:33,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:33,285 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:33,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57575063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:33,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:33,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 07:59:33,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865690895] [2021-06-05 07:59:33,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:59:33,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:33,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:59:33,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:59:33,286 INFO L87 Difference]: Start difference. First operand 3353 states and 9368 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) [2021-06-05 07:59:33,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:33,820 INFO L93 Difference]: Finished difference Result 4471 states and 11807 transitions. [2021-06-05 07:59:33,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:59:33,820 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 [2021-06-05 07:59:33,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:33,824 INFO L225 Difference]: With dead ends: 4471 [2021-06-05 07:59:33,825 INFO L226 Difference]: Without dead ends: 4201 [2021-06-05 07:59:33,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 520.3ms TimeCoverageRelationStatistics Valid=804, Invalid=2276, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:59:33,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-06-05 07:59:33,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 3428. [2021-06-05 07:59:33,857 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) [2021-06-05 07:59:33,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9593 transitions. [2021-06-05 07:59:33,861 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9593 transitions. Word has length 115 [2021-06-05 07:59:33,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:33,862 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9593 transitions. [2021-06-05 07:59:33,862 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) [2021-06-05 07:59:33,862 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9593 transitions. [2021-06-05 07:59:33,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:59:33,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:33,864 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] [2021-06-05 07:59:34,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:34,065 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:34,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:34,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1762592338, now seen corresponding path program 143 times [2021-06-05 07:59:34,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:34,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414241828] [2021-06-05 07:59:34,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:34,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:34,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414241828] [2021-06-05 07:59:34,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414241828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:34,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314195818] [2021-06-05 07:59:34,223 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 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 [2021-06-05 07:59:34,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 07:59:34,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:34,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:59:34,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:34,470 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:34,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314195818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:34,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:34,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 07:59:34,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052676359] [2021-06-05 07:59:34,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:34,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:34,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:34,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:34,471 INFO L87 Difference]: Start difference. First operand 3428 states and 9593 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:35,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:35,136 INFO L93 Difference]: Finished difference Result 4496 states and 11932 transitions. [2021-06-05 07:59:35,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 07:59:35,136 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:59:35,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:35,140 INFO L225 Difference]: With dead ends: 4496 [2021-06-05 07:59:35,140 INFO L226 Difference]: Without dead ends: 4226 [2021-06-05 07:59:35,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 649.0ms TimeCoverageRelationStatistics Valid=835, Invalid=2471, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 07:59:35,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-05 07:59:35,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3503. [2021-06-05 07:59:35,172 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) [2021-06-05 07:59:35,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9818 transitions. [2021-06-05 07:59:35,176 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9818 transitions. Word has length 115 [2021-06-05 07:59:35,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:35,177 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9818 transitions. [2021-06-05 07:59:35,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:35,177 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9818 transitions. [2021-06-05 07:59:35,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:59:35,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:35,179 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] [2021-06-05 07:59:35,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:35,381 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:35,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:35,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1918135488, now seen corresponding path program 144 times [2021-06-05 07:59:35,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:35,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022602198] [2021-06-05 07:59:35,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:35,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:35,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:35,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022602198] [2021-06-05 07:59:35,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022602198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:35,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719843530] [2021-06-05 07:59:35,543 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 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 [2021-06-05 07:59:35,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 07:59:35,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:35,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:59:35,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:35,752 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:35,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719843530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:35,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:35,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 07:59:35,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443182469] [2021-06-05 07:59:35,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:59:35,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:35,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:59:35,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:59:35,753 INFO L87 Difference]: Start difference. First operand 3503 states and 9818 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) [2021-06-05 07:59:36,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:36,316 INFO L93 Difference]: Finished difference Result 4566 states and 12177 transitions. [2021-06-05 07:59:36,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 07:59:36,316 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 [2021-06-05 07:59:36,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:36,321 INFO L225 Difference]: With dead ends: 4566 [2021-06-05 07:59:36,321 INFO L226 Difference]: Without dead ends: 4296 [2021-06-05 07:59:36,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 550.8ms TimeCoverageRelationStatistics Valid=905, Invalid=2401, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 07:59:36,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2021-06-05 07:59:36,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 3578. [2021-06-05 07:59:36,376 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) [2021-06-05 07:59:36,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 10058 transitions. [2021-06-05 07:59:36,380 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 10058 transitions. Word has length 115 [2021-06-05 07:59:36,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:36,380 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 10058 transitions. [2021-06-05 07:59:36,380 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) [2021-06-05 07:59:36,380 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 10058 transitions. [2021-06-05 07:59:36,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:59:36,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:36,383 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] [2021-06-05 07:59:36,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 07:59:36,583 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:36,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:36,584 INFO L82 PathProgramCache]: Analyzing trace with hash 661589520, now seen corresponding path program 145 times [2021-06-05 07:59:36,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:36,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330751576] [2021-06-05 07:59:36,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:36,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:36,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:36,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330751576] [2021-06-05 07:59:36,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330751576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:36,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512455543] [2021-06-05 07:59:36,743 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 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 [2021-06-05 07:59:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:36,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:59:36,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:36,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512455543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:36,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:36,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 07:59:36,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114725210] [2021-06-05 07:59:36,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:36,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:37,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:37,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:37,000 INFO L87 Difference]: Start difference. First operand 3578 states and 10058 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:37,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:37,800 INFO L93 Difference]: Finished difference Result 5144 states and 13803 transitions. [2021-06-05 07:59:37,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 07:59:37,800 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:59:37,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:37,805 INFO L225 Difference]: With dead ends: 5144 [2021-06-05 07:59:37,805 INFO L226 Difference]: Without dead ends: 4521 [2021-06-05 07:59:37,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 758.7ms TimeCoverageRelationStatistics Valid=961, Invalid=2821, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 07:59:37,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2021-06-05 07:59:37,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 3653. [2021-06-05 07:59:37,834 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) [2021-06-05 07:59:37,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10288 transitions. [2021-06-05 07:59:37,838 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10288 transitions. Word has length 115 [2021-06-05 07:59:37,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:37,838 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10288 transitions. [2021-06-05 07:59:37,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:59:37,839 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10288 transitions. [2021-06-05 07:59:37,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:59:37,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:37,841 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] [2021-06-05 07:59:38,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 07:59:38,042 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:38,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:38,042 INFO L82 PathProgramCache]: Analyzing trace with hash -371058082, now seen corresponding path program 146 times [2021-06-05 07:59:38,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:38,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158710879] [2021-06-05 07:59:38,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:38,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:38,265 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:38,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:38,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158710879] [2021-06-05 07:59:38,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158710879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:38,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789685966] [2021-06-05 07:59:38,265 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 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 [2021-06-05 07:59:38,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:59:38,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:38,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:59:38,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:38,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789685966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:38,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:38,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 07:59:38,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938807593] [2021-06-05 07:59:38,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:59:38,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:38,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:59:38,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:59:38,506 INFO L87 Difference]: Start difference. First operand 3653 states and 10288 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) [2021-06-05 07:59:39,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:39,134 INFO L93 Difference]: Finished difference Result 5348 states and 14471 transitions. [2021-06-05 07:59:39,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 07:59:39,134 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 [2021-06-05 07:59:39,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:39,139 INFO L225 Difference]: With dead ends: 5348 [2021-06-05 07:59:39,139 INFO L226 Difference]: Without dead ends: 5078 [2021-06-05 07:59:39,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 605.5ms TimeCoverageRelationStatistics Valid=1023, Invalid=2517, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 07:59:39,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5078 states. [2021-06-05 07:59:39,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5078 to 3833. [2021-06-05 07:59:39,170 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) [2021-06-05 07:59:39,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 10847 transitions. [2021-06-05 07:59:39,174 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 10847 transitions. Word has length 115 [2021-06-05 07:59:39,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:39,174 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 10847 transitions. [2021-06-05 07:59:39,174 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) [2021-06-05 07:59:39,174 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 10847 transitions. [2021-06-05 07:59:39,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 07:59:39,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:39,177 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] [2021-06-05 07:59:39,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 07:59:39,377 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:39,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:39,378 INFO L82 PathProgramCache]: Analyzing trace with hash -348714832, now seen corresponding path program 147 times [2021-06-05 07:59:39,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:39,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151550308] [2021-06-05 07:59:39,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:39,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:39,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151550308] [2021-06-05 07:59:39,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151550308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:39,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666241963] [2021-06-05 07:59:39,528 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 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 [2021-06-05 07:59:39,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 07:59:39,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:39,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:59:39,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:39,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666241963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:39,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:39,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 07:59:39,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715894966] [2021-06-05 07:59:39,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:39,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:39,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:39,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:39,750 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) [2021-06-05 07:59:40,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:40,541 INFO L93 Difference]: Finished difference Result 5216 states and 14136 transitions. [2021-06-05 07:59:40,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 07:59:40,541 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 [2021-06-05 07:59:40,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:40,546 INFO L225 Difference]: With dead ends: 5216 [2021-06-05 07:59:40,546 INFO L226 Difference]: Without dead ends: 4641 [2021-06-05 07:59:40,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 749.0ms TimeCoverageRelationStatistics Valid=1013, Invalid=3147, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 07:59:40,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2021-06-05 07:59:40,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 2524. [2021-06-05 07:59:40,571 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) [2021-06-05 07:59:40,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 6906 transitions. [2021-06-05 07:59:40,574 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 6906 transitions. Word has length 115 [2021-06-05 07:59:40,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:40,574 INFO L482 AbstractCegarLoop]: Abstraction has 2524 states and 6906 transitions. [2021-06-05 07:59:40,574 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) [2021-06-05 07:59:40,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 6906 transitions. [2021-06-05 07:59:40,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:59:40,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:40,576 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] [2021-06-05 07:59:40,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 07:59:40,776 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:40,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:40,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1146705884, now seen corresponding path program 148 times [2021-06-05 07:59:40,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:40,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773036055] [2021-06-05 07:59:40,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:40,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:40,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773036055] [2021-06-05 07:59:40,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773036055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:40,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824618528] [2021-06-05 07:59:40,987 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 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 [2021-06-05 07:59:41,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:59:41,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:41,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:59:41,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:41,259 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:41,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824618528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:41,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:41,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 27 [2021-06-05 07:59:41,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743193501] [2021-06-05 07:59:41,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:59:41,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:41,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:59:41,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:59:41,260 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) [2021-06-05 07:59:41,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:41,700 INFO L93 Difference]: Finished difference Result 3614 states and 9406 transitions. [2021-06-05 07:59:41,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:59:41,700 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 [2021-06-05 07:59:41,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:41,704 INFO L225 Difference]: With dead ends: 3614 [2021-06-05 07:59:41,704 INFO L226 Difference]: Without dead ends: 3280 [2021-06-05 07:59:41,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 516.7ms TimeCoverageRelationStatistics Valid=680, Invalid=1870, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:59:41,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-06-05 07:59:41,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2609. [2021-06-05 07:59:41,727 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) [2021-06-05 07:59:41,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2609 states to 2609 states and 7076 transitions. [2021-06-05 07:59:41,730 INFO L78 Accepts]: Start accepts. Automaton has 2609 states and 7076 transitions. Word has length 120 [2021-06-05 07:59:41,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:41,730 INFO L482 AbstractCegarLoop]: Abstraction has 2609 states and 7076 transitions. [2021-06-05 07:59:41,730 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) [2021-06-05 07:59:41,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2609 states and 7076 transitions. [2021-06-05 07:59:41,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:59:41,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:41,732 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] [2021-06-05 07:59:41,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:41,935 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:41,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:41,935 INFO L82 PathProgramCache]: Analyzing trace with hash 51245472, now seen corresponding path program 149 times [2021-06-05 07:59:41,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:41,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389263023] [2021-06-05 07:59:41,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:41,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:42,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:42,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389263023] [2021-06-05 07:59:42,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389263023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:42,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364749662] [2021-06-05 07:59:42,140 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 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 [2021-06-05 07:59:42,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 07:59:42,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:42,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:59:42,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:42,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364749662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:42,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:42,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 07:59:42,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576943568] [2021-06-05 07:59:42,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:42,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:42,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:42,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:42,364 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) [2021-06-05 07:59:42,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:42,713 INFO L93 Difference]: Finished difference Result 4436 states and 10987 transitions. [2021-06-05 07:59:42,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:59:42,713 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 [2021-06-05 07:59:42,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:42,717 INFO L225 Difference]: With dead ends: 4436 [2021-06-05 07:59:42,717 INFO L226 Difference]: Without dead ends: 4166 [2021-06-05 07:59:42,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 433.6ms TimeCoverageRelationStatistics Valid=543, Invalid=1437, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:59:42,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2021-06-05 07:59:42,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 2753. [2021-06-05 07:59:42,742 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) [2021-06-05 07:59:42,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7493 transitions. [2021-06-05 07:59:42,745 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7493 transitions. Word has length 120 [2021-06-05 07:59:42,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:42,745 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7493 transitions. [2021-06-05 07:59:42,745 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) [2021-06-05 07:59:42,745 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7493 transitions. [2021-06-05 07:59:42,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:59:42,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:42,747 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] [2021-06-05 07:59:42,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:42,948 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:42,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:42,948 INFO L82 PathProgramCache]: Analyzing trace with hash -847277968, now seen corresponding path program 150 times [2021-06-05 07:59:42,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:42,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066255947] [2021-06-05 07:59:42,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:42,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:43,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:43,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066255947] [2021-06-05 07:59:43,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066255947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:43,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133087453] [2021-06-05 07:59:43,182 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 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 [2021-06-05 07:59:43,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 07:59:43,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:43,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:59:43,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:43,431 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:43,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133087453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:43,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:43,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 07:59:43,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201021910] [2021-06-05 07:59:43,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:59:43,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:43,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:59:43,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:59:43,432 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) [2021-06-05 07:59:43,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:43,859 INFO L93 Difference]: Finished difference Result 4396 states and 10982 transitions. [2021-06-05 07:59:43,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:59:43,859 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 [2021-06-05 07:59:43,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:43,863 INFO L225 Difference]: With dead ends: 4396 [2021-06-05 07:59:43,863 INFO L226 Difference]: Without dead ends: 4126 [2021-06-05 07:59:43,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 524.1ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:59:43,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-05 07:59:43,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 2828. [2021-06-05 07:59:43,888 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) [2021-06-05 07:59:43,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7718 transitions. [2021-06-05 07:59:43,891 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7718 transitions. Word has length 120 [2021-06-05 07:59:43,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:43,892 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7718 transitions. [2021-06-05 07:59:43,892 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) [2021-06-05 07:59:43,892 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7718 transitions. [2021-06-05 07:59:43,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:59:43,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:43,894 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] [2021-06-05 07:59:44,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:44,094 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:44,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:44,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1832735838, now seen corresponding path program 151 times [2021-06-05 07:59:44,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:44,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055667734] [2021-06-05 07:59:44,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:44,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:44,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:44,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055667734] [2021-06-05 07:59:44,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055667734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:44,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154018908] [2021-06-05 07:59:44,310 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 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 [2021-06-05 07:59:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:44,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:59:44,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:44,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154018908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:44,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:44,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 07:59:44,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586178611] [2021-06-05 07:59:44,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:44,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:44,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:44,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:44,574 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) [2021-06-05 07:59:45,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:45,021 INFO L93 Difference]: Finished difference Result 4446 states and 11157 transitions. [2021-06-05 07:59:45,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:59:45,022 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 [2021-06-05 07:59:45,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:45,027 INFO L225 Difference]: With dead ends: 4446 [2021-06-05 07:59:45,027 INFO L226 Difference]: Without dead ends: 4176 [2021-06-05 07:59:45,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 491.0ms TimeCoverageRelationStatistics Valid=549, Invalid=1613, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:59:45,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-05 07:59:45,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 2903. [2021-06-05 07:59:45,060 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) [2021-06-05 07:59:45,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 7943 transitions. [2021-06-05 07:59:45,063 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 7943 transitions. Word has length 120 [2021-06-05 07:59:45,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:45,064 INFO L482 AbstractCegarLoop]: Abstraction has 2903 states and 7943 transitions. [2021-06-05 07:59:45,064 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) [2021-06-05 07:59:45,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 7943 transitions. [2021-06-05 07:59:45,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:59:45,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:45,066 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] [2021-06-05 07:59:45,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:45,266 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:45,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:45,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1452291886, now seen corresponding path program 152 times [2021-06-05 07:59:45,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:45,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519686159] [2021-06-05 07:59:45,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:45,537 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:45,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:45,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519686159] [2021-06-05 07:59:45,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519686159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:45,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619493735] [2021-06-05 07:59:45,538 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 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 [2021-06-05 07:59:45,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:59:45,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:45,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:59:45,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:45,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619493735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:45,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:45,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 07:59:45,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726265315] [2021-06-05 07:59:45,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:59:45,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:45,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:59:45,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:59:45,819 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) [2021-06-05 07:59:46,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:46,295 INFO L93 Difference]: Finished difference Result 4471 states and 11282 transitions. [2021-06-05 07:59:46,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:59:46,295 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 [2021-06-05 07:59:46,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:46,299 INFO L225 Difference]: With dead ends: 4471 [2021-06-05 07:59:46,299 INFO L226 Difference]: Without dead ends: 4201 [2021-06-05 07:59:46,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 601.7ms TimeCoverageRelationStatistics Valid=622, Invalid=1928, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:59:46,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-06-05 07:59:46,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 2978. [2021-06-05 07:59:46,324 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) [2021-06-05 07:59:46,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 8168 transitions. [2021-06-05 07:59:46,327 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 8168 transitions. Word has length 120 [2021-06-05 07:59:46,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:46,327 INFO L482 AbstractCegarLoop]: Abstraction has 2978 states and 8168 transitions. [2021-06-05 07:59:46,327 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) [2021-06-05 07:59:46,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 8168 transitions. [2021-06-05 07:59:46,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:59:46,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:46,329 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] [2021-06-05 07:59:46,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:46,533 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:46,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:46,533 INFO L82 PathProgramCache]: Analyzing trace with hash 2076667036, now seen corresponding path program 153 times [2021-06-05 07:59:46,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:46,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101367245] [2021-06-05 07:59:46,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:46,721 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:46,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:46,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101367245] [2021-06-05 07:59:46,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101367245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:46,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634547121] [2021-06-05 07:59:46,722 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 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 [2021-06-05 07:59:46,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 07:59:46,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:46,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 07:59:46,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:46,942 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:46,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634547121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:46,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:46,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 07:59:46,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641251846] [2021-06-05 07:59:46,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:46,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:46,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:46,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:46,943 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) [2021-06-05 07:59:47,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:47,393 INFO L93 Difference]: Finished difference Result 4496 states and 11407 transitions. [2021-06-05 07:59:47,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:59:47,394 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 [2021-06-05 07:59:47,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:47,398 INFO L225 Difference]: With dead ends: 4496 [2021-06-05 07:59:47,398 INFO L226 Difference]: Without dead ends: 4226 [2021-06-05 07:59:47,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 468.6ms TimeCoverageRelationStatistics Valid=571, Invalid=1781, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:59:47,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-05 07:59:47,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3053. [2021-06-05 07:59:47,423 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) [2021-06-05 07:59:47,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 8393 transitions. [2021-06-05 07:59:47,427 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 8393 transitions. Word has length 120 [2021-06-05 07:59:47,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:47,427 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 8393 transitions. [2021-06-05 07:59:47,427 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) [2021-06-05 07:59:47,427 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 8393 transitions. [2021-06-05 07:59:47,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:59:47,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:47,429 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] [2021-06-05 07:59:47,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:47,630 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:47,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:47,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1409248404, now seen corresponding path program 154 times [2021-06-05 07:59:47,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:47,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675774414] [2021-06-05 07:59:47,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:47,867 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:47,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:47,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675774414] [2021-06-05 07:59:47,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675774414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:47,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865368558] [2021-06-05 07:59:47,868 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 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 [2021-06-05 07:59:47,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:59:47,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:47,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:59:47,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:48,113 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:48,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865368558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:48,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:48,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 07:59:48,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241083273] [2021-06-05 07:59:48,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:59:48,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:48,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:59:48,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:59:48,114 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) [2021-06-05 07:59:48,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:48,686 INFO L93 Difference]: Finished difference Result 4521 states and 11532 transitions. [2021-06-05 07:59:48,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:59:48,686 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 [2021-06-05 07:59:48,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:48,690 INFO L225 Difference]: With dead ends: 4521 [2021-06-05 07:59:48,691 INFO L226 Difference]: Without dead ends: 4251 [2021-06-05 07:59:48,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 600.7ms TimeCoverageRelationStatistics Valid=652, Invalid=2104, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:59:48,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-06-05 07:59:48,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 3128. [2021-06-05 07:59:48,719 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) [2021-06-05 07:59:48,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 8618 transitions. [2021-06-05 07:59:48,723 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 8618 transitions. Word has length 120 [2021-06-05 07:59:48,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:48,723 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 8618 transitions. [2021-06-05 07:59:48,723 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) [2021-06-05 07:59:48,723 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 8618 transitions. [2021-06-05 07:59:48,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:59:48,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:48,725 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] [2021-06-05 07:59:48,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 07:59:48,926 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:48,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:48,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1493768794, now seen corresponding path program 155 times [2021-06-05 07:59:48,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:48,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070778732] [2021-06-05 07:59:48,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:49,100 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:49,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:49,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070778732] [2021-06-05 07:59:49,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070778732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:49,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738569795] [2021-06-05 07:59:49,100 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 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 [2021-06-05 07:59:49,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 07:59:49,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:49,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:59:49,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:49,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738569795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:49,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:49,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 07:59:49,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311382460] [2021-06-05 07:59:49,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:49,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:49,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:49,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:49,319 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) [2021-06-05 07:59:49,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:49,810 INFO L93 Difference]: Finished difference Result 4546 states and 11657 transitions. [2021-06-05 07:59:49,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:59:49,810 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 [2021-06-05 07:59:49,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:49,814 INFO L225 Difference]: With dead ends: 4546 [2021-06-05 07:59:49,814 INFO L226 Difference]: Without dead ends: 4276 [2021-06-05 07:59:49,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 503.2ms TimeCoverageRelationStatistics Valid=609, Invalid=1941, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:59:49,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2021-06-05 07:59:49,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 3203. [2021-06-05 07:59:49,841 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) [2021-06-05 07:59:49,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8843 transitions. [2021-06-05 07:59:49,844 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8843 transitions. Word has length 120 [2021-06-05 07:59:49,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:49,845 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8843 transitions. [2021-06-05 07:59:49,845 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) [2021-06-05 07:59:49,845 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8843 transitions. [2021-06-05 07:59:49,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:59:49,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:49,847 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] [2021-06-05 07:59:50,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 07:59:50,047 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:50,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:50,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1248691498, now seen corresponding path program 156 times [2021-06-05 07:59:50,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:50,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789000280] [2021-06-05 07:59:50,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:50,233 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:50,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:50,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789000280] [2021-06-05 07:59:50,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789000280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:50,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527235990] [2021-06-05 07:59:50,233 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 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 [2021-06-05 07:59:50,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 07:59:50,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:50,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:59:50,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:50,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527235990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:50,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:50,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 07:59:50,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668503183] [2021-06-05 07:59:50,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:59:50,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:50,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:59:50,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:59:50,470 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) [2021-06-05 07:59:51,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:51,070 INFO L93 Difference]: Finished difference Result 4571 states and 11782 transitions. [2021-06-05 07:59:51,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 07:59:51,071 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 [2021-06-05 07:59:51,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:51,075 INFO L225 Difference]: With dead ends: 4571 [2021-06-05 07:59:51,075 INFO L226 Difference]: Without dead ends: 4301 [2021-06-05 07:59:51,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 612.3ms TimeCoverageRelationStatistics Valid=698, Invalid=2272, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:59:51,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4301 states. [2021-06-05 07:59:51,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4301 to 3278. [2021-06-05 07:59:51,116 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) [2021-06-05 07:59:51,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 9068 transitions. [2021-06-05 07:59:51,122 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 9068 transitions. Word has length 120 [2021-06-05 07:59:51,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:51,122 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 9068 transitions. [2021-06-05 07:59:51,122 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) [2021-06-05 07:59:51,122 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 9068 transitions. [2021-06-05 07:59:51,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:59:51,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:51,125 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] [2021-06-05 07:59:51,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 07:59:51,325 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:51,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:51,325 INFO L82 PathProgramCache]: Analyzing trace with hash 871841176, now seen corresponding path program 157 times [2021-06-05 07:59:51,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:51,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457582893] [2021-06-05 07:59:51,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:51,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:51,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457582893] [2021-06-05 07:59:51,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457582893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:51,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414877361] [2021-06-05 07:59:51,497 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 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 [2021-06-05 07:59:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:51,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:59:51,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:51,708 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:51,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414877361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:51,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:51,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 07:59:51,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334558086] [2021-06-05 07:59:51,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:51,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:51,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:51,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:51,709 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) [2021-06-05 07:59:52,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:52,222 INFO L93 Difference]: Finished difference Result 4596 states and 11907 transitions. [2021-06-05 07:59:52,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:59:52,225 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 [2021-06-05 07:59:52,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:52,229 INFO L225 Difference]: With dead ends: 4596 [2021-06-05 07:59:52,229 INFO L226 Difference]: Without dead ends: 4326 [2021-06-05 07:59:52,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 531.4ms TimeCoverageRelationStatistics Valid=663, Invalid=2093, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:59:52,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-06-05 07:59:52,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3353. [2021-06-05 07:59:52,262 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) [2021-06-05 07:59:52,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9293 transitions. [2021-06-05 07:59:52,266 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9293 transitions. Word has length 120 [2021-06-05 07:59:52,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:52,266 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9293 transitions. [2021-06-05 07:59:52,266 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) [2021-06-05 07:59:52,266 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9293 transitions. [2021-06-05 07:59:52,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:59:52,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:52,268 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] [2021-06-05 07:59:52,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 07:59:52,469 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:52,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:52,469 INFO L82 PathProgramCache]: Analyzing trace with hash -2096370584, now seen corresponding path program 158 times [2021-06-05 07:59:52,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:52,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770045351] [2021-06-05 07:59:52,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:52,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:52,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770045351] [2021-06-05 07:59:52,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770045351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:52,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52123005] [2021-06-05 07:59:52,646 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 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 [2021-06-05 07:59:52,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:59:52,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:52,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:59:52,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:52,874 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:52,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52123005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:52,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:52,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 07:59:52,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879734659] [2021-06-05 07:59:52,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:59:52,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:52,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:59:52,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:59:52,875 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) [2021-06-05 07:59:53,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:53,531 INFO L93 Difference]: Finished difference Result 4621 states and 12032 transitions. [2021-06-05 07:59:53,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:59:53,532 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 [2021-06-05 07:59:53,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:53,536 INFO L225 Difference]: With dead ends: 4621 [2021-06-05 07:59:53,536 INFO L226 Difference]: Without dead ends: 4351 [2021-06-05 07:59:53,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 652.3ms TimeCoverageRelationStatistics Valid=760, Invalid=2432, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:59:53,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4351 states. [2021-06-05 07:59:53,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4351 to 3428. [2021-06-05 07:59:53,568 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) [2021-06-05 07:59:53,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9518 transitions. [2021-06-05 07:59:53,572 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9518 transitions. Word has length 120 [2021-06-05 07:59:53,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:53,572 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9518 transitions. [2021-06-05 07:59:53,572 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) [2021-06-05 07:59:53,572 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9518 transitions. [2021-06-05 07:59:53,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:59:53,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:53,575 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] [2021-06-05 07:59:53,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:53,776 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:53,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:53,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1642154410, now seen corresponding path program 159 times [2021-06-05 07:59:53,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:53,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264095811] [2021-06-05 07:59:53,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:53,943 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:53,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:53,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264095811] [2021-06-05 07:59:53,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264095811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:53,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509770085] [2021-06-05 07:59:53,943 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 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 [2021-06-05 07:59:54,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 07:59:54,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:54,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 07:59:54,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:54,180 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:54,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509770085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:54,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:54,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 07:59:54,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226070114] [2021-06-05 07:59:54,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:54,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:54,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:54,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:54,181 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) [2021-06-05 07:59:54,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:54,748 INFO L93 Difference]: Finished difference Result 4646 states and 12157 transitions. [2021-06-05 07:59:54,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:59:54,748 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 [2021-06-05 07:59:54,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:54,753 INFO L225 Difference]: With dead ends: 4646 [2021-06-05 07:59:54,753 INFO L226 Difference]: Without dead ends: 4376 [2021-06-05 07:59:54,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 539.7ms TimeCoverageRelationStatistics Valid=733, Invalid=2237, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:59:54,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4376 states. [2021-06-05 07:59:54,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4376 to 3503. [2021-06-05 07:59:54,787 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) [2021-06-05 07:59:54,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9743 transitions. [2021-06-05 07:59:54,791 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9743 transitions. Word has length 120 [2021-06-05 07:59:54,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:54,791 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9743 transitions. [2021-06-05 07:59:54,791 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) [2021-06-05 07:59:54,792 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9743 transitions. [2021-06-05 07:59:54,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:59:54,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:54,794 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] [2021-06-05 07:59:54,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 07:59:54,995 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:54,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:54,995 INFO L82 PathProgramCache]: Analyzing trace with hash -643258074, now seen corresponding path program 160 times [2021-06-05 07:59:54,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:54,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550604723] [2021-06-05 07:59:54,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:55,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:55,172 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:55,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:55,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550604723] [2021-06-05 07:59:55,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550604723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:55,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379827492] [2021-06-05 07:59:55,172 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 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 [2021-06-05 07:59:55,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:59:55,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:55,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:59:55,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:55,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379827492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:55,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:55,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 07:59:55,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903723409] [2021-06-05 07:59:55,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:59:55,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:55,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:59:55,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:59:55,401 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) [2021-06-05 07:59:56,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:56,124 INFO L93 Difference]: Finished difference Result 4671 states and 12282 transitions. [2021-06-05 07:59:56,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 07:59:56,124 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 [2021-06-05 07:59:56,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:56,129 INFO L225 Difference]: With dead ends: 4671 [2021-06-05 07:59:56,129 INFO L226 Difference]: Without dead ends: 4401 [2021-06-05 07:59:56,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 692.6ms TimeCoverageRelationStatistics Valid=838, Invalid=2584, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:59:56,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-06-05 07:59:56,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 3578. [2021-06-05 07:59:56,177 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) [2021-06-05 07:59:56,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 9968 transitions. [2021-06-05 07:59:56,181 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 9968 transitions. Word has length 120 [2021-06-05 07:59:56,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:56,181 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 9968 transitions. [2021-06-05 07:59:56,181 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) [2021-06-05 07:59:56,181 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 9968 transitions. [2021-06-05 07:59:56,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:59:56,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:56,184 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] [2021-06-05 07:59:56,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:56,384 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:56,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:56,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1772381332, now seen corresponding path program 161 times [2021-06-05 07:59:56,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:56,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962556828] [2021-06-05 07:59:56,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:56,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:56,558 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:56,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:56,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962556828] [2021-06-05 07:59:56,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962556828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:56,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132626958] [2021-06-05 07:59:56,558 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 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 [2021-06-05 07:59:56,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 07:59:56,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:56,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:59:56,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:56,772 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:56,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132626958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:56,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:56,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 07:59:56,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333494643] [2021-06-05 07:59:56,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:56,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:56,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:56,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:56,773 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) [2021-06-05 07:59:57,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:57,387 INFO L93 Difference]: Finished difference Result 4696 states and 12407 transitions. [2021-06-05 07:59:57,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:59:57,388 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 [2021-06-05 07:59:57,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:57,392 INFO L225 Difference]: With dead ends: 4696 [2021-06-05 07:59:57,392 INFO L226 Difference]: Without dead ends: 4426 [2021-06-05 07:59:57,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 578.0ms TimeCoverageRelationStatistics Valid=819, Invalid=2373, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:59:57,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2021-06-05 07:59:57,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 3653. [2021-06-05 07:59:57,426 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) [2021-06-05 07:59:57,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10193 transitions. [2021-06-05 07:59:57,431 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10193 transitions. Word has length 120 [2021-06-05 07:59:57,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:57,431 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10193 transitions. [2021-06-05 07:59:57,431 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) [2021-06-05 07:59:57,431 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10193 transitions. [2021-06-05 07:59:57,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:59:57,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:57,434 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] [2021-06-05 07:59:57,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:57,634 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:57,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:57,634 INFO L82 PathProgramCache]: Analyzing trace with hash -492266652, now seen corresponding path program 162 times [2021-06-05 07:59:57,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:57,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349244020] [2021-06-05 07:59:57,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:57,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:57,804 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:57,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:57,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349244020] [2021-06-05 07:59:57,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349244020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:57,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122459313] [2021-06-05 07:59:57,804 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 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 [2021-06-05 07:59:57,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 07:59:57,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:59:57,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 07:59:57,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:58,034 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:58,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122459313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:58,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:58,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 07:59:58,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896250450] [2021-06-05 07:59:58,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:59:58,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:58,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:59:58,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:59:58,035 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) [2021-06-05 07:59:58,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:59:58,769 INFO L93 Difference]: Finished difference Result 4721 states and 12532 transitions. [2021-06-05 07:59:58,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 07:59:58,769 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 [2021-06-05 07:59:58,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:59:58,773 INFO L225 Difference]: With dead ends: 4721 [2021-06-05 07:59:58,773 INFO L226 Difference]: Without dead ends: 4451 [2021-06-05 07:59:58,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 696.8ms TimeCoverageRelationStatistics Valid=799, Invalid=2623, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:59:58,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-06-05 07:59:58,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 3728. [2021-06-05 07:59:58,807 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) [2021-06-05 07:59:58,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 10418 transitions. [2021-06-05 07:59:58,811 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 10418 transitions. Word has length 120 [2021-06-05 07:59:58,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:59:58,812 INFO L482 AbstractCegarLoop]: Abstraction has 3728 states and 10418 transitions. [2021-06-05 07:59:58,812 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) [2021-06-05 07:59:58,812 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 10418 transitions. [2021-06-05 07:59:58,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 07:59:58,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:59:58,814 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] [2021-06-05 07:59:59,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:59:59,015 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:59:59,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:59:59,015 INFO L82 PathProgramCache]: Analyzing trace with hash 121972818, now seen corresponding path program 163 times [2021-06-05 07:59:59,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:59:59,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29438307] [2021-06-05 07:59:59,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:59:59,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:59,209 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:59,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:59:59,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29438307] [2021-06-05 07:59:59,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29438307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:59,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965700887] [2021-06-05 07:59:59,210 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 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 [2021-06-05 07:59:59,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:59:59,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:59:59,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:59:59,461 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:59:59,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965700887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:59:59,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:59:59,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 07:59:59,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262459415] [2021-06-05 07:59:59,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:59:59,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:59:59,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:59:59,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:59:59,462 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) [2021-06-05 08:00:00,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 08:00:00,094 INFO L93 Difference]: Finished difference Result 4791 states and 12777 transitions. [2021-06-05 08:00:00,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 08:00:00,094 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 [2021-06-05 08:00:00,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 08:00:00,099 INFO L225 Difference]: With dead ends: 4791 [2021-06-05 08:00:00,099 INFO L226 Difference]: Without dead ends: 4521 [2021-06-05 08:00:00,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 631.8ms TimeCoverageRelationStatistics Valid=921, Invalid=2501, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 08:00:00,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2021-06-05 08:00:00,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 3803. [2021-06-05 08:00:00,134 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) [2021-06-05 08:00:00,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 10658 transitions. [2021-06-05 08:00:00,139 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 10658 transitions. Word has length 120 [2021-06-05 08:00:00,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 08:00:00,139 INFO L482 AbstractCegarLoop]: Abstraction has 3803 states and 10658 transitions. [2021-06-05 08:00:00,139 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) [2021-06-05 08:00:00,139 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 10658 transitions. [2021-06-05 08:00:00,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 08:00:00,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 08:00:00,142 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] [2021-06-05 08:00:00,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 08:00:00,342 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 08:00:00,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 08:00:00,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1593269470, now seen corresponding path program 164 times [2021-06-05 08:00:00,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 08:00:00,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477181383] [2021-06-05 08:00:00,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 08:00:00,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 08:00:00,509 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:00,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 08:00:00,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477181383] [2021-06-05 08:00:00,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477181383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:00,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504193412] [2021-06-05 08:00:00,509 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 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 [2021-06-05 08:00:00,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 08:00:00,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 08:00:00,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 08:00:00,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 08:00:00,752 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:00,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504193412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:00,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 08:00:00,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 08:00:00,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936361760] [2021-06-05 08:00:00,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 08:00:00,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 08:00:00,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 08:00:00,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-05 08:00:00,753 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) [2021-06-05 08:00:01,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 08:00:01,623 INFO L93 Difference]: Finished difference Result 5369 states and 14403 transitions. [2021-06-05 08:00:01,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 08:00:01,623 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 [2021-06-05 08:00:01,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 08:00:01,628 INFO L225 Difference]: With dead ends: 5369 [2021-06-05 08:00:01,628 INFO L226 Difference]: Without dead ends: 4746 [2021-06-05 08:00:01,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 828.2ms TimeCoverageRelationStatistics Valid=1065, Invalid=3095, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 08:00:01,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4746 states. [2021-06-05 08:00:01,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4746 to 3878. [2021-06-05 08:00:01,662 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) [2021-06-05 08:00:01,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10888 transitions. [2021-06-05 08:00:01,668 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10888 transitions. Word has length 120 [2021-06-05 08:00:01,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 08:00:01,668 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10888 transitions. [2021-06-05 08:00:01,668 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) [2021-06-05 08:00:01,668 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10888 transitions. [2021-06-05 08:00:01,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 08:00:01,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 08:00:01,671 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] [2021-06-05 08:00:01,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-06-05 08:00:01,871 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 08:00:01,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 08:00:01,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1669050224, now seen corresponding path program 165 times [2021-06-05 08:00:01,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 08:00:01,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266844949] [2021-06-05 08:00:01,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 08:00:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 08:00:02,083 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:02,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 08:00:02,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266844949] [2021-06-05 08:00:02,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266844949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:02,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818383282] [2021-06-05 08:00:02,084 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 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 [2021-06-05 08:00:02,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 08:00:02,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 08:00:02,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 08:00:02,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 08:00:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:02,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818383282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:02,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 08:00:02,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 08:00:02,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249940216] [2021-06-05 08:00:02,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 08:00:02,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 08:00:02,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 08:00:02,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-05 08:00:02,338 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) [2021-06-05 08:00:03,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 08:00:03,421 INFO L93 Difference]: Finished difference Result 5598 states and 15121 transitions. [2021-06-05 08:00:03,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 08:00:03,421 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 [2021-06-05 08:00:03,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 08:00:03,427 INFO L225 Difference]: With dead ends: 5598 [2021-06-05 08:00:03,427 INFO L226 Difference]: Without dead ends: 5328 [2021-06-05 08:00:03,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 997.8ms TimeCoverageRelationStatistics Valid=1040, Invalid=2620, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 08:00:03,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5328 states. [2021-06-05 08:00:03,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5328 to 4058. [2021-06-05 08:00:03,468 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) [2021-06-05 08:00:03,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4058 states to 4058 states and 11447 transitions. [2021-06-05 08:00:03,474 INFO L78 Accepts]: Start accepts. Automaton has 4058 states and 11447 transitions. Word has length 120 [2021-06-05 08:00:03,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 08:00:03,474 INFO L482 AbstractCegarLoop]: Abstraction has 4058 states and 11447 transitions. [2021-06-05 08:00:03,474 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) [2021-06-05 08:00:03,474 INFO L276 IsEmpty]: Start isEmpty. Operand 4058 states and 11447 transitions. [2021-06-05 08:00:03,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 08:00:03,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 08:00:03,478 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] [2021-06-05 08:00:03,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 08:00:03,678 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 08:00:03,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 08:00:03,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1691393474, now seen corresponding path program 166 times [2021-06-05 08:00:03,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 08:00:03,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111952124] [2021-06-05 08:00:03,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 08:00:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 08:00:03,975 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:03,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 08:00:03,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111952124] [2021-06-05 08:00:03,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111952124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:03,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880223176] [2021-06-05 08:00:03,976 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 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 [2021-06-05 08:00:04,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 08:00:04,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 08:00:04,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 08:00:04,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 08:00:04,273 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:04,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880223176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:04,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 08:00:04,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 08:00:04,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60033415] [2021-06-05 08:00:04,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 08:00:04,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 08:00:04,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 08:00:04,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-05 08:00:04,274 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) [2021-06-05 08:00:05,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 08:00:05,430 INFO L93 Difference]: Finished difference Result 5085 states and 13821 transitions. [2021-06-05 08:00:05,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 08:00:05,430 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 [2021-06-05 08:00:05,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 08:00:05,437 INFO L225 Difference]: With dead ends: 5085 [2021-06-05 08:00:05,437 INFO L226 Difference]: Without dead ends: 4506 [2021-06-05 08:00:05,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1111.6ms TimeCoverageRelationStatistics Valid=1146, Invalid=2886, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 08:00:05,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4506 states. [2021-06-05 08:00:05,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4506 to 2713. [2021-06-05 08:00:05,479 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) [2021-06-05 08:00:05,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7428 transitions. [2021-06-05 08:00:05,484 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7428 transitions. Word has length 120 [2021-06-05 08:00:05,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 08:00:05,484 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7428 transitions. [2021-06-05 08:00:05,484 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) [2021-06-05 08:00:05,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7428 transitions. [2021-06-05 08:00:05,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 08:00:05,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 08:00:05,487 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] [2021-06-05 08:00:05,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 08:00:05,701 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 08:00:05,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 08:00:05,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1352458403, now seen corresponding path program 167 times [2021-06-05 08:00:05,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 08:00:05,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448924237] [2021-06-05 08:00:05,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 08:00:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 08:00:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:06,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 08:00:06,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448924237] [2021-06-05 08:00:06,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448924237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:06,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584248788] [2021-06-05 08:00:06,039 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 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 [2021-06-05 08:00:06,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 08:00:06,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 08:00:06,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 08:00:06,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 08:00:06,299 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:06,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584248788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:06,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 08:00:06,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 08:00:06,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710675234] [2021-06-05 08:00:06,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 08:00:06,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 08:00:06,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 08:00:06,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-05 08:00:06,300 INFO L87 Difference]: Start difference. First operand 2713 states and 7428 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) [2021-06-05 08:00:06,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 08:00:06,708 INFO L93 Difference]: Finished difference Result 4031 states and 10267 transitions. [2021-06-05 08:00:06,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 08:00:06,708 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 [2021-06-05 08:00:06,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 08:00:06,713 INFO L225 Difference]: With dead ends: 4031 [2021-06-05 08:00:06,713 INFO L226 Difference]: Without dead ends: 3761 [2021-06-05 08:00:06,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 554.9ms TimeCoverageRelationStatistics Valid=610, Invalid=1742, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 08:00:06,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2021-06-05 08:00:06,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 2788. [2021-06-05 08:00:06,739 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) [2021-06-05 08:00:06,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7653 transitions. [2021-06-05 08:00:06,742 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7653 transitions. Word has length 125 [2021-06-05 08:00:06,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 08:00:06,742 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7653 transitions. [2021-06-05 08:00:06,742 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) [2021-06-05 08:00:06,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7653 transitions. [2021-06-05 08:00:06,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 08:00:06,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 08:00:06,744 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] [2021-06-05 08:00:06,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 08:00:06,945 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 08:00:06,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 08:00:06,945 INFO L82 PathProgramCache]: Analyzing trace with hash 2043985453, now seen corresponding path program 168 times [2021-06-05 08:00:06,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 08:00:06,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287902846] [2021-06-05 08:00:06,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 08:00:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 08:00:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:07,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 08:00:07,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287902846] [2021-06-05 08:00:07,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287902846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:07,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181179736] [2021-06-05 08:00:07,250 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 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 [2021-06-05 08:00:07,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 08:00:07,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 08:00:07,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 08:00:07,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 08:00:07,599 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:07,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181179736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:07,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 08:00:07,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-06-05 08:00:07,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429589573] [2021-06-05 08:00:07,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 08:00:07,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 08:00:07,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 08:00:07,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-06-05 08:00:07,601 INFO L87 Difference]: Start difference. First operand 2788 states and 7653 transitions. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 08:00:08,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 08:00:08,153 INFO L93 Difference]: Finished difference Result 4501 states and 11282 transitions. [2021-06-05 08:00:08,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 08:00:08,153 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have 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 [2021-06-05 08:00:08,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 08:00:08,157 INFO L225 Difference]: With dead ends: 4501 [2021-06-05 08:00:08,157 INFO L226 Difference]: Without dead ends: 4231 [2021-06-05 08:00:08,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 658.8ms TimeCoverageRelationStatistics Valid=665, Invalid=1987, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 08:00:08,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4231 states. [2021-06-05 08:00:08,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4231 to 2863. [2021-06-05 08:00:08,185 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) [2021-06-05 08:00:08,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7878 transitions. [2021-06-05 08:00:08,189 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7878 transitions. Word has length 125 [2021-06-05 08:00:08,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 08:00:08,189 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7878 transitions. [2021-06-05 08:00:08,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 08:00:08,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7878 transitions. [2021-06-05 08:00:08,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 08:00:08,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 08:00:08,192 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] [2021-06-05 08:00:08,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 08:00:08,392 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 08:00:08,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 08:00:08,393 INFO L82 PathProgramCache]: Analyzing trace with hash 429031963, now seen corresponding path program 169 times [2021-06-05 08:00:08,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 08:00:08,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29882813] [2021-06-05 08:00:08,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 08:00:08,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 08:00:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:08,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 08:00:08,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29882813] [2021-06-05 08:00:08,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29882813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:08,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828086288] [2021-06-05 08:00:08,693 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 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 [2021-06-05 08:00:08,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 08:00:08,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 08:00:08,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 08:00:08,921 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:08,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828086288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:08,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 08:00:08,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 08:00:08,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148016384] [2021-06-05 08:00:08,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 08:00:08,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 08:00:08,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 08:00:08,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-06-05 08:00:08,922 INFO L87 Difference]: Start difference. First operand 2863 states and 7878 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) [2021-06-05 08:00:09,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 08:00:09,364 INFO L93 Difference]: Finished difference Result 4531 states and 11417 transitions. [2021-06-05 08:00:09,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 08:00:09,364 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 [2021-06-05 08:00:09,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 08:00:09,368 INFO L225 Difference]: With dead ends: 4531 [2021-06-05 08:00:09,368 INFO L226 Difference]: Without dead ends: 4261 [2021-06-05 08:00:09,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 568.4ms TimeCoverageRelationStatistics Valid=663, Invalid=1989, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 08:00:09,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4261 states. [2021-06-05 08:00:09,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4261 to 2938. [2021-06-05 08:00:09,396 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) [2021-06-05 08:00:09,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8103 transitions. [2021-06-05 08:00:09,399 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8103 transitions. Word has length 125 [2021-06-05 08:00:09,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 08:00:09,399 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8103 transitions. [2021-06-05 08:00:09,400 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) [2021-06-05 08:00:09,400 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8103 transitions. [2021-06-05 08:00:09,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 08:00:09,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 08:00:09,402 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] [2021-06-05 08:00:09,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 08:00:09,602 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 08:00:09,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 08:00:09,603 INFO L82 PathProgramCache]: Analyzing trace with hash 48588011, now seen corresponding path program 170 times [2021-06-05 08:00:09,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 08:00:09,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885407401] [2021-06-05 08:00:09,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 08:00:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 08:00:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:09,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 08:00:09,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885407401] [2021-06-05 08:00:09,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885407401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:09,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098528063] [2021-06-05 08:00:09,850 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 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 [2021-06-05 08:00:09,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 08:00:09,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 08:00:09,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 08:00:09,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 08:00:10,138 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:10,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098528063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:10,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 08:00:10,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-06-05 08:00:10,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413684696] [2021-06-05 08:00:10,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 08:00:10,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 08:00:10,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 08:00:10,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 08:00:10,140 INFO L87 Difference]: Start difference. First operand 2938 states and 8103 transitions. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 08:00:10,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 08:00:10,892 INFO L93 Difference]: Finished difference Result 4556 states and 11542 transitions. [2021-06-05 08:00:10,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 08:00:10,892 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have 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 [2021-06-05 08:00:10,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 08:00:10,898 INFO L225 Difference]: With dead ends: 4556 [2021-06-05 08:00:10,898 INFO L226 Difference]: Without dead ends: 4286 [2021-06-05 08:00:10,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 771.3ms TimeCoverageRelationStatistics Valid=686, Invalid=2176, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 08:00:10,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4286 states. [2021-06-05 08:00:11,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4286 to 3013. [2021-06-05 08:00:11,022 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) [2021-06-05 08:00:11,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8328 transitions. [2021-06-05 08:00:11,043 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8328 transitions. Word has length 125 [2021-06-05 08:00:11,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 08:00:11,043 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8328 transitions. [2021-06-05 08:00:11,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 08:00:11,044 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8328 transitions. [2021-06-05 08:00:11,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 08:00:11,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 08:00:11,047 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] [2021-06-05 08:00:11,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 08:00:11,261 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 08:00:11,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 08:00:11,261 INFO L82 PathProgramCache]: Analyzing trace with hash 672963161, now seen corresponding path program 171 times [2021-06-05 08:00:11,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 08:00:11,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609637930] [2021-06-05 08:00:11,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 08:00:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 08:00:11,517 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:11,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 08:00:11,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609637930] [2021-06-05 08:00:11,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609637930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:11,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353395800] [2021-06-05 08:00:11,517 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 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 [2021-06-05 08:00:11,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 08:00:11,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 08:00:11,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 08:00:11,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 08:00:11,793 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:11,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353395800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:11,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 08:00:11,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 08:00:11,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977204577] [2021-06-05 08:00:11,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 08:00:11,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 08:00:11,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 08:00:11,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-05 08:00:11,795 INFO L87 Difference]: Start difference. First operand 3013 states and 8328 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) [2021-06-05 08:00:12,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 08:00:12,364 INFO L93 Difference]: Finished difference Result 4581 states and 11667 transitions. [2021-06-05 08:00:12,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 08:00:12,364 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 [2021-06-05 08:00:12,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 08:00:12,369 INFO L225 Difference]: With dead ends: 4581 [2021-06-05 08:00:12,369 INFO L226 Difference]: Without dead ends: 4311 [2021-06-05 08:00:12,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 618.6ms TimeCoverageRelationStatistics Valid=698, Invalid=2164, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 08:00:12,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4311 states. [2021-06-05 08:00:12,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4311 to 3088. [2021-06-05 08:00:12,412 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) [2021-06-05 08:00:12,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8553 transitions. [2021-06-05 08:00:12,416 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8553 transitions. Word has length 125 [2021-06-05 08:00:12,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 08:00:12,417 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8553 transitions. [2021-06-05 08:00:12,417 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) [2021-06-05 08:00:12,417 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8553 transitions. [2021-06-05 08:00:12,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 08:00:12,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 08:00:12,419 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] [2021-06-05 08:00:12,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-06-05 08:00:12,629 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 08:00:12,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 08:00:12,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1482015017, now seen corresponding path program 172 times [2021-06-05 08:00:12,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 08:00:12,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365677823] [2021-06-05 08:00:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 08:00:12,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 08:00:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:12,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 08:00:12,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365677823] [2021-06-05 08:00:12,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365677823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:12,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052479714] [2021-06-05 08:00:12,865 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 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 [2021-06-05 08:00:12,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 08:00:12,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 08:00:12,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 08:00:12,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 08:00:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:13,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052479714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:13,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 08:00:13,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-06-05 08:00:13,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892730229] [2021-06-05 08:00:13,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 08:00:13,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 08:00:13,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 08:00:13,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 08:00:13,154 INFO L87 Difference]: Start difference. First operand 3088 states and 8553 transitions. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 08:00:13,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 08:00:13,845 INFO L93 Difference]: Finished difference Result 4606 states and 11792 transitions. [2021-06-05 08:00:13,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 08:00:13,845 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have 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 [2021-06-05 08:00:13,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 08:00:13,850 INFO L225 Difference]: With dead ends: 4606 [2021-06-05 08:00:13,851 INFO L226 Difference]: Without dead ends: 4336 [2021-06-05 08:00:13,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 722.3ms TimeCoverageRelationStatistics Valid=723, Invalid=2357, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 08:00:13,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4336 states. [2021-06-05 08:00:13,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4336 to 3163. [2021-06-05 08:00:13,893 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) [2021-06-05 08:00:13,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 8778 transitions. [2021-06-05 08:00:13,898 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 8778 transitions. Word has length 125 [2021-06-05 08:00:13,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 08:00:13,899 INFO L482 AbstractCegarLoop]: Abstraction has 3163 states and 8778 transitions. [2021-06-05 08:00:13,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 08:00:13,899 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 8778 transitions. [2021-06-05 08:00:13,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 08:00:13,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 08:00:13,902 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] [2021-06-05 08:00:14,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 08:00:14,126 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 08:00:14,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 08:00:14,126 INFO L82 PathProgramCache]: Analyzing trace with hash 90064919, now seen corresponding path program 173 times [2021-06-05 08:00:14,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 08:00:14,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75261063] [2021-06-05 08:00:14,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 08:00:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 08:00:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:14,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 08:00:14,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75261063] [2021-06-05 08:00:14,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75261063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:14,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686277252] [2021-06-05 08:00:14,347 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 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 [2021-06-05 08:00:14,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 08:00:14,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 08:00:14,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 08:00:14,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 08:00:14,647 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:14,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686277252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:14,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 08:00:14,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 08:00:14,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602732213] [2021-06-05 08:00:14,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 08:00:14,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 08:00:14,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 08:00:14,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-05 08:00:14,648 INFO L87 Difference]: Start difference. First operand 3163 states and 8778 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) [2021-06-05 08:00:15,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 08:00:15,326 INFO L93 Difference]: Finished difference Result 4631 states and 11917 transitions. [2021-06-05 08:00:15,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 08:00:15,326 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 [2021-06-05 08:00:15,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 08:00:15,332 INFO L225 Difference]: With dead ends: 4631 [2021-06-05 08:00:15,332 INFO L226 Difference]: Without dead ends: 4361 [2021-06-05 08:00:15,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 651.1ms TimeCoverageRelationStatistics Valid=749, Invalid=2331, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 08:00:15,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4361 states. [2021-06-05 08:00:15,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 3238. [2021-06-05 08:00:15,380 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) [2021-06-05 08:00:15,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3238 states to 3238 states and 9003 transitions. [2021-06-05 08:00:15,386 INFO L78 Accepts]: Start accepts. Automaton has 3238 states and 9003 transitions. Word has length 125 [2021-06-05 08:00:15,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 08:00:15,386 INFO L482 AbstractCegarLoop]: Abstraction has 3238 states and 9003 transitions. [2021-06-05 08:00:15,387 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) [2021-06-05 08:00:15,387 INFO L276 IsEmpty]: Start isEmpty. Operand 3238 states and 9003 transitions. [2021-06-05 08:00:15,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 08:00:15,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 08:00:15,390 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] [2021-06-05 08:00:15,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 08:00:15,605 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 08:00:15,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 08:00:15,605 INFO L82 PathProgramCache]: Analyzing trace with hash -155012377, now seen corresponding path program 174 times [2021-06-05 08:00:15,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 08:00:15,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857191957] [2021-06-05 08:00:15,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 08:00:15,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 08:00:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:15,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 08:00:15,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857191957] [2021-06-05 08:00:15,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857191957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:15,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217647591] [2021-06-05 08:00:15,840 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 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 [2021-06-05 08:00:15,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 08:00:15,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 08:00:15,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 08:00:15,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 08:00:16,165 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:16,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217647591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:16,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 08:00:16,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-06-05 08:00:16,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731693081] [2021-06-05 08:00:16,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 08:00:16,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 08:00:16,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 08:00:16,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-05 08:00:16,166 INFO L87 Difference]: Start difference. First operand 3238 states and 9003 transitions. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 08:00:16,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 08:00:16,900 INFO L93 Difference]: Finished difference Result 4656 states and 12042 transitions. [2021-06-05 08:00:16,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 08:00:16,900 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have 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 [2021-06-05 08:00:16,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 08:00:16,905 INFO L225 Difference]: With dead ends: 4656 [2021-06-05 08:00:16,905 INFO L226 Difference]: Without dead ends: 4386 [2021-06-05 08:00:16,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 751.8ms TimeCoverageRelationStatistics Valid=776, Invalid=2530, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 08:00:16,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2021-06-05 08:00:16,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 3313. [2021-06-05 08:00:16,949 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) [2021-06-05 08:00:16,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3313 states to 3313 states and 9228 transitions. [2021-06-05 08:00:16,954 INFO L78 Accepts]: Start accepts. Automaton has 3313 states and 9228 transitions. Word has length 125 [2021-06-05 08:00:16,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 08:00:16,954 INFO L482 AbstractCegarLoop]: Abstraction has 3313 states and 9228 transitions. [2021-06-05 08:00:16,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 08:00:16,955 INFO L276 IsEmpty]: Start isEmpty. Operand 3313 states and 9228 transitions. [2021-06-05 08:00:16,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 08:00:16,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 08:00:16,957 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] [2021-06-05 08:00:17,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 08:00:17,182 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 08:00:17,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 08:00:17,183 INFO L82 PathProgramCache]: Analyzing trace with hash -531862699, now seen corresponding path program 175 times [2021-06-05 08:00:17,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 08:00:17,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966903206] [2021-06-05 08:00:17,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 08:00:17,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 08:00:17,533 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:17,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 08:00:17,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966903206] [2021-06-05 08:00:17,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966903206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:17,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597916881] [2021-06-05 08:00:17,533 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 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 [2021-06-05 08:00:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 08:00:17,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 08:00:17,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 08:00:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:17,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597916881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:17,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 08:00:17,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 08:00:17,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342171225] [2021-06-05 08:00:17,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 08:00:17,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 08:00:17,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 08:00:17,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 08:00:17,776 INFO L87 Difference]: Start difference. First operand 3313 states and 9228 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) [2021-06-05 08:00:18,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 08:00:18,702 INFO L93 Difference]: Finished difference Result 4681 states and 12167 transitions. [2021-06-05 08:00:18,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 08:00:18,703 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 [2021-06-05 08:00:18,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 08:00:18,709 INFO L225 Difference]: With dead ends: 4681 [2021-06-05 08:00:18,709 INFO L226 Difference]: Without dead ends: 4411 [2021-06-05 08:00:18,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 852.1ms TimeCoverageRelationStatistics Valid=816, Invalid=2490, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 08:00:18,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4411 states. [2021-06-05 08:00:18,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4411 to 3388. [2021-06-05 08:00:18,783 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) [2021-06-05 08:00:18,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 9453 transitions. [2021-06-05 08:00:18,789 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 9453 transitions. Word has length 125 [2021-06-05 08:00:18,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 08:00:18,789 INFO L482 AbstractCegarLoop]: Abstraction has 3388 states and 9453 transitions. [2021-06-05 08:00:18,789 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) [2021-06-05 08:00:18,789 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 9453 transitions. [2021-06-05 08:00:18,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 08:00:18,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 08:00:18,792 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] [2021-06-05 08:00:19,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 08:00:19,016 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 08:00:19,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 08:00:19,016 INFO L82 PathProgramCache]: Analyzing trace with hash 794892837, now seen corresponding path program 176 times [2021-06-05 08:00:19,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 08:00:19,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942159094] [2021-06-05 08:00:19,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 08:00:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 08:00:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:19,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 08:00:19,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942159094] [2021-06-05 08:00:19,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942159094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:19,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089337351] [2021-06-05 08:00:19,305 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 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 [2021-06-05 08:00:19,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 08:00:19,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 08:00:19,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 08:00:19,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 08:00:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:19,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089337351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:19,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 08:00:19,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-06-05 08:00:19,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034474566] [2021-06-05 08:00:19,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 08:00:19,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 08:00:19,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 08:00:19,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-05 08:00:19,626 INFO L87 Difference]: Start difference. First operand 3388 states and 9453 transitions. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 08:00:20,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 08:00:20,604 INFO L93 Difference]: Finished difference Result 4706 states and 12292 transitions. [2021-06-05 08:00:20,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 08:00:20,604 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have 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 [2021-06-05 08:00:20,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 08:00:20,609 INFO L225 Difference]: With dead ends: 4706 [2021-06-05 08:00:20,609 INFO L226 Difference]: Without dead ends: 4436 [2021-06-05 08:00:20,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 952.2ms TimeCoverageRelationStatistics Valid=845, Invalid=2695, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 08:00:20,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4436 states. [2021-06-05 08:00:20,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4436 to 3463. [2021-06-05 08:00:20,651 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) [2021-06-05 08:00:20,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 9678 transitions. [2021-06-05 08:00:20,656 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 9678 transitions. Word has length 125 [2021-06-05 08:00:20,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 08:00:20,656 INFO L482 AbstractCegarLoop]: Abstraction has 3463 states and 9678 transitions. [2021-06-05 08:00:20,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 08:00:20,656 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 9678 transitions. [2021-06-05 08:00:20,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 08:00:20,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 08:00:20,659 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] [2021-06-05 08:00:20,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-05 08:00:20,860 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 08:00:20,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 08:00:20,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1249109011, now seen corresponding path program 177 times [2021-06-05 08:00:20,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 08:00:20,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226232557] [2021-06-05 08:00:20,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 08:00:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 08:00:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:21,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 08:00:21,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226232557] [2021-06-05 08:00:21,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226232557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:21,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115688900] [2021-06-05 08:00:21,070 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 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 [2021-06-05 08:00:21,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 08:00:21,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 08:00:21,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 08:00:21,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 08:00:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:21,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115688900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:21,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 08:00:21,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 08:00:21,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061059839] [2021-06-05 08:00:21,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 08:00:21,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 08:00:21,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 08:00:21,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-05 08:00:21,339 INFO L87 Difference]: Start difference. First operand 3463 states and 9678 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) [2021-06-05 08:00:22,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 08:00:22,047 INFO L93 Difference]: Finished difference Result 4731 states and 12417 transitions. [2021-06-05 08:00:22,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 08:00:22,048 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 [2021-06-05 08:00:22,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 08:00:22,054 INFO L225 Difference]: With dead ends: 4731 [2021-06-05 08:00:22,054 INFO L226 Difference]: Without dead ends: 4461 [2021-06-05 08:00:22,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 693.9ms TimeCoverageRelationStatistics Valid=899, Invalid=2641, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 08:00:22,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4461 states. [2021-06-05 08:00:22,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4461 to 3538. [2021-06-05 08:00:22,152 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) [2021-06-05 08:00:22,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 9903 transitions. [2021-06-05 08:00:22,158 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 9903 transitions. Word has length 125 [2021-06-05 08:00:22,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 08:00:22,159 INFO L482 AbstractCegarLoop]: Abstraction has 3538 states and 9903 transitions. [2021-06-05 08:00:22,159 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) [2021-06-05 08:00:22,159 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 9903 transitions. [2021-06-05 08:00:22,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 08:00:22,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 08:00:22,163 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] [2021-06-05 08:00:22,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 08:00:22,387 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 08:00:22,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 08:00:22,387 INFO L82 PathProgramCache]: Analyzing trace with hash -2046961949, now seen corresponding path program 178 times [2021-06-05 08:00:22,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 08:00:22,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694560036] [2021-06-05 08:00:22,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 08:00:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 08:00:22,605 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:22,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 08:00:22,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694560036] [2021-06-05 08:00:22,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694560036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:22,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908678431] [2021-06-05 08:00:22,605 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 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 [2021-06-05 08:00:22,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 08:00:22,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 08:00:22,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 08:00:22,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 08:00:22,887 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:22,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908678431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:22,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 08:00:22,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-06-05 08:00:22,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966297752] [2021-06-05 08:00:22,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 08:00:22,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 08:00:22,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 08:00:22,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 08:00:22,888 INFO L87 Difference]: Start difference. First operand 3538 states and 9903 transitions. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 08:00:23,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 08:00:23,776 INFO L93 Difference]: Finished difference Result 4756 states and 12542 transitions. [2021-06-05 08:00:23,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 08:00:23,777 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have 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 [2021-06-05 08:00:23,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 08:00:23,782 INFO L225 Difference]: With dead ends: 4756 [2021-06-05 08:00:23,782 INFO L226 Difference]: Without dead ends: 4486 [2021-06-05 08:00:23,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 849.8ms TimeCoverageRelationStatistics Valid=930, Invalid=2852, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 08:00:23,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2021-06-05 08:00:23,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 3613. [2021-06-05 08:00:23,831 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) [2021-06-05 08:00:23,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 10128 transitions. [2021-06-05 08:00:23,837 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 10128 transitions. Word has length 125 [2021-06-05 08:00:23,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 08:00:23,838 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 10128 transitions. [2021-06-05 08:00:23,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 08:00:23,838 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 10128 transitions. [2021-06-05 08:00:23,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 08:00:23,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 08:00:23,857 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] [2021-06-05 08:00:24,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 08:00:24,077 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 08:00:24,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 08:00:24,077 INFO L82 PathProgramCache]: Analyzing trace with hash 368677457, now seen corresponding path program 179 times [2021-06-05 08:00:24,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 08:00:24,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867173543] [2021-06-05 08:00:24,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 08:00:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 08:00:24,312 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:24,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 08:00:24,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867173543] [2021-06-05 08:00:24,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867173543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:24,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8422493] [2021-06-05 08:00:24,313 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 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 [2021-06-05 08:00:24,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 08:00:24,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 08:00:24,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 08:00:24,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 08:00:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:24,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8422493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:24,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 08:00:24,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 08:00:24,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152141573] [2021-06-05 08:00:24,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 08:00:24,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 08:00:24,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 08:00:24,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-05 08:00:24,581 INFO L87 Difference]: Start difference. First operand 3613 states and 10128 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) [2021-06-05 08:00:25,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 08:00:25,413 INFO L93 Difference]: Finished difference Result 4781 states and 12667 transitions. [2021-06-05 08:00:25,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 08:00:25,413 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 [2021-06-05 08:00:25,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 08:00:25,418 INFO L225 Difference]: With dead ends: 4781 [2021-06-05 08:00:25,418 INFO L226 Difference]: Without dead ends: 4511 [2021-06-05 08:00:25,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 779.4ms TimeCoverageRelationStatistics Valid=998, Invalid=2784, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 08:00:25,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-06-05 08:00:25,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3688. [2021-06-05 08:00:25,464 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) [2021-06-05 08:00:25,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 10353 transitions. [2021-06-05 08:00:25,470 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 10353 transitions. Word has length 125 [2021-06-05 08:00:25,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 08:00:25,470 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 10353 transitions. [2021-06-05 08:00:25,471 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) [2021-06-05 08:00:25,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 10353 transitions. [2021-06-05 08:00:25,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 08:00:25,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 08:00:25,474 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] [2021-06-05 08:00:25,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 08:00:25,693 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 08:00:25,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 08:00:25,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1895970527, now seen corresponding path program 180 times [2021-06-05 08:00:25,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 08:00:25,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855521050] [2021-06-05 08:00:25,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 08:00:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 08:00:25,905 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:25,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 08:00:25,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855521050] [2021-06-05 08:00:25,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855521050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:25,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711659713] [2021-06-05 08:00:25,905 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 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 [2021-06-05 08:00:25,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 08:00:25,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 08:00:26,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 08:00:26,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 08:00:26,208 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:26,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711659713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:26,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 08:00:26,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-06-05 08:00:26,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972757421] [2021-06-05 08:00:26,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 08:00:26,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 08:00:26,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 08:00:26,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-06-05 08:00:26,210 INFO L87 Difference]: Start difference. First operand 3688 states and 10353 transitions. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 08:00:27,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 08:00:27,069 INFO L93 Difference]: Finished difference Result 4806 states and 12792 transitions. [2021-06-05 08:00:27,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 08:00:27,069 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have 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 [2021-06-05 08:00:27,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 08:00:27,075 INFO L225 Difference]: With dead ends: 4806 [2021-06-05 08:00:27,075 INFO L226 Difference]: Without dead ends: 4536 [2021-06-05 08:00:27,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 825.2ms TimeCoverageRelationStatistics Valid=965, Invalid=3067, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 08:00:27,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2021-06-05 08:00:27,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 3763. [2021-06-05 08:00:27,114 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) [2021-06-05 08:00:27,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 10578 transitions. [2021-06-05 08:00:27,119 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 10578 transitions. Word has length 125 [2021-06-05 08:00:27,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 08:00:27,119 INFO L482 AbstractCegarLoop]: Abstraction has 3763 states and 10578 transitions. [2021-06-05 08:00:27,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 08:00:27,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 10578 transitions. [2021-06-05 08:00:27,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 08:00:27,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 08:00:27,122 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] [2021-06-05 08:00:27,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-06-05 08:00:27,329 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 08:00:27,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 08:00:27,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1281731057, now seen corresponding path program 181 times [2021-06-05 08:00:27,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 08:00:27,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825959735] [2021-06-05 08:00:27,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 08:00:27,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 08:00:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:27,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 08:00:27,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825959735] [2021-06-05 08:00:27,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825959735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:27,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815261402] [2021-06-05 08:00:27,592 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 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 [2021-06-05 08:00:27,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 08:00:27,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 08:00:27,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 08:00:27,809 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:27,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815261402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:27,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 08:00:27,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 08:00:27,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048570734] [2021-06-05 08:00:27,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 08:00:27,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 08:00:27,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 08:00:27,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-06-05 08:00:27,810 INFO L87 Difference]: Start difference. First operand 3763 states and 10578 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) [2021-06-05 08:00:28,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 08:00:28,535 INFO L93 Difference]: Finished difference Result 4831 states and 12917 transitions. [2021-06-05 08:00:28,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 08:00:28,535 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 [2021-06-05 08:00:28,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 08:00:28,540 INFO L225 Difference]: With dead ends: 4831 [2021-06-05 08:00:28,540 INFO L226 Difference]: Without dead ends: 4561 [2021-06-05 08:00:28,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 745.2ms TimeCoverageRelationStatistics Valid=1113, Invalid=2919, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 08:00:28,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-06-05 08:00:28,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3838. [2021-06-05 08:00:28,590 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) [2021-06-05 08:00:28,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 10803 transitions. [2021-06-05 08:00:28,599 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 10803 transitions. Word has length 125 [2021-06-05 08:00:28,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 08:00:28,599 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 10803 transitions. [2021-06-05 08:00:28,599 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) [2021-06-05 08:00:28,599 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 10803 transitions. [2021-06-05 08:00:28,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 08:00:28,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 08:00:28,604 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] [2021-06-05 08:00:28,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 08:00:28,817 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 08:00:28,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 08:00:28,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1297993951, now seen corresponding path program 182 times [2021-06-05 08:00:28,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 08:00:28,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277988813] [2021-06-05 08:00:28,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 08:00:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 08:00:29,340 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:29,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 08:00:29,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277988813] [2021-06-05 08:00:29,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277988813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:29,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129155915] [2021-06-05 08:00:29,340 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 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 [2021-06-05 08:00:29,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 08:00:29,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 08:00:29,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 08:00:29,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 08:00:29,594 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:29,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129155915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:29,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 08:00:29,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-06-05 08:00:29,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776438784] [2021-06-05 08:00:29,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 08:00:29,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 08:00:29,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 08:00:29,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-06-05 08:00:29,595 INFO L87 Difference]: Start difference. First operand 3838 states and 10803 transitions. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 08:00:30,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 08:00:30,457 INFO L93 Difference]: Finished difference Result 4916 states and 13207 transitions. [2021-06-05 08:00:30,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 08:00:30,458 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have 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 [2021-06-05 08:00:30,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 08:00:30,465 INFO L225 Difference]: With dead ends: 4916 [2021-06-05 08:00:30,465 INFO L226 Difference]: Without dead ends: 4646 [2021-06-05 08:00:30,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 1078.5ms TimeCoverageRelationStatistics Valid=1148, Invalid=3142, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 08:00:30,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4646 states. [2021-06-05 08:00:30,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4646 to 3913. [2021-06-05 08:00:30,510 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) [2021-06-05 08:00:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 11048 transitions. [2021-06-05 08:00:30,516 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 11048 transitions. Word has length 125 [2021-06-05 08:00:30,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 08:00:30,516 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 11048 transitions. [2021-06-05 08:00:30,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 08:00:30,516 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 11048 transitions. [2021-06-05 08:00:30,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 08:00:30,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 08:00:30,520 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] [2021-06-05 08:00:30,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 08:00:30,720 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 08:00:30,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 08:00:30,721 INFO L82 PathProgramCache]: Analyzing trace with hash 265346349, now seen corresponding path program 183 times [2021-06-05 08:00:30,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 08:00:30,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491288304] [2021-06-05 08:00:30,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 08:00:30,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 08:00:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:30,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 08:00:30,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491288304] [2021-06-05 08:00:30,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491288304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:30,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981828461] [2021-06-05 08:00:30,926 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 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 [2021-06-05 08:00:31,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 08:00:31,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 08:00:31,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 08:00:31,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 08:00:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:31,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981828461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:31,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 08:00:31,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 08:00:31,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374997373] [2021-06-05 08:00:31,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 08:00:31,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 08:00:31,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 08:00:31,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-05 08:00:31,198 INFO L87 Difference]: Start difference. First operand 3913 states and 11048 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) [2021-06-05 08:00:31,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 08:00:31,949 INFO L93 Difference]: Finished difference Result 5658 states and 15331 transitions. [2021-06-05 08:00:31,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 08:00:31,949 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 [2021-06-05 08:00:31,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 08:00:31,955 INFO L225 Difference]: With dead ends: 5658 [2021-06-05 08:00:31,955 INFO L226 Difference]: Without dead ends: 5388 [2021-06-05 08:00:31,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 728.6ms TimeCoverageRelationStatistics Valid=1245, Invalid=3045, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 08:00:31,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5388 states. [2021-06-05 08:00:31,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5388 to 4093. [2021-06-05 08:00:31,994 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) [2021-06-05 08:00:31,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4093 states to 4093 states and 11607 transitions. [2021-06-05 08:00:31,999 INFO L78 Accepts]: Start accepts. Automaton has 4093 states and 11607 transitions. Word has length 125 [2021-06-05 08:00:31,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 08:00:31,999 INFO L482 AbstractCegarLoop]: Abstraction has 4093 states and 11607 transitions. [2021-06-05 08:00:31,999 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) [2021-06-05 08:00:31,999 INFO L276 IsEmpty]: Start isEmpty. Operand 4093 states and 11607 transitions. [2021-06-05 08:00:32,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 08:00:32,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 08:00:32,002 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] [2021-06-05 08:00:32,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 08:00:32,203 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 08:00:32,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 08:00:32,203 INFO L82 PathProgramCache]: Analyzing trace with hash 287689599, now seen corresponding path program 184 times [2021-06-05 08:00:32,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 08:00:32,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258658187] [2021-06-05 08:00:32,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 08:00:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 08:00:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:32,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 08:00:32,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258658187] [2021-06-05 08:00:32,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258658187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:32,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512238874] [2021-06-05 08:00:32,394 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 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 [2021-06-05 08:00:32,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 08:00:32,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 08:00:32,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 08:00:32,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 08:00:32,629 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 08:00:32,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512238874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 08:00:32,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 08:00:32,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 08:00:32,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231562145] [2021-06-05 08:00:32,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 08:00:32,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 08:00:32,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 08:00:32,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-05 08:00:32,630 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) [2021-06-05 08:00:33,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 08:00:33,626 INFO L93 Difference]: Finished difference Result 5120 states and 13981 transitions. [2021-06-05 08:00:33,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 08:00:33,627 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 [2021-06-05 08:00:33,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 08:00:33,633 INFO L225 Difference]: With dead ends: 5120 [2021-06-05 08:00:33,633 INFO L226 Difference]: Without dead ends: 4631 [2021-06-05 08:00:33,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 946.8ms TimeCoverageRelationStatistics Valid=1258, Invalid=3164, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 08:00:33,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4631 states. [2021-06-05 08:00:33,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4631 to 2634. [2021-06-05 08:00:33,674 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) [2021-06-05 08:00:33,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 7216 transitions. [2021-06-05 08:00:33,677 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 7216 transitions. Word has length 125 [2021-06-05 08:00:33,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 08:00:33,678 INFO L482 AbstractCegarLoop]: Abstraction has 2634 states and 7216 transitions. [2021-06-05 08:00:33,678 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) [2021-06-05 08:00:33,678 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 7216 transitions. [2021-06-05 08:00:33,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 08:00:33,680 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 08:00:33,680 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] [2021-06-05 08:00:33,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 08:00:33,893 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 08:00:33,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 08:00:33,893 INFO L82 PathProgramCache]: Analyzing trace with hash -325106707, now seen corresponding path program 185 times [2021-06-05 08:00:33,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 08:00:33,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821726933] [2021-06-05 08:00:33,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 08:00:33,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 08:00:33,907 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 08:00:33,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 08:00:33,920 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 08:00:33,983 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 08:00:33,984 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 08:00:33,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2021-06-05 08:00:33,989 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 08:00:34,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 08:00:34 BasicIcfg [2021-06-05 08:00:34,107 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 08:00:34,107 INFO L168 Benchmark]: Toolchain (without parser) took 202437.68 ms. Allocated memory was 364.9 MB in the beginning and 1.2 GB in the end (delta: 803.2 MB). Free memory was 326.9 MB in the beginning and 502.6 MB in the end (delta: -175.6 MB). Peak memory consumption was 629.3 MB. Max. memory is 16.0 GB. [2021-06-05 08:00:34,108 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 364.9 MB. Free memory was 345.0 MB in the beginning and 344.9 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 08:00:34,108 INFO L168 Benchmark]: CACSL2BoogieTranslator took 441.07 ms. Allocated memory is still 364.9 MB. Free memory was 326.7 MB in the beginning and 328.7 MB in the end (delta: -1.9 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.0 GB. [2021-06-05 08:00:34,108 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.36 ms. Allocated memory is still 364.9 MB. Free memory was 328.7 MB in the beginning and 326.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 08:00:34,108 INFO L168 Benchmark]: Boogie Preprocessor took 18.84 ms. Allocated memory is still 364.9 MB. Free memory was 326.6 MB in the beginning and 325.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 08:00:34,108 INFO L168 Benchmark]: RCFGBuilder took 528.37 ms. Allocated memory is still 364.9 MB. Free memory was 325.5 MB in the beginning and 302.4 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-06-05 08:00:34,108 INFO L168 Benchmark]: TraceAbstraction took 201398.82 ms. Allocated memory was 364.9 MB in the beginning and 1.2 GB in the end (delta: 803.2 MB). Free memory was 302.4 MB in the beginning and 502.6 MB in the end (delta: -200.1 MB). Peak memory consumption was 603.1 MB. Max. memory is 16.0 GB. [2021-06-05 08:00:34,108 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 364.9 MB. Free memory was 345.0 MB in the beginning and 344.9 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 441.07 ms. Allocated memory is still 364.9 MB. Free memory was 326.7 MB in the beginning and 328.7 MB in the end (delta: -1.9 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 29.36 ms. Allocated memory is still 364.9 MB. Free memory was 328.7 MB in the beginning and 326.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 18.84 ms. Allocated memory is still 364.9 MB. Free memory was 326.6 MB in the beginning and 325.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 528.37 ms. Allocated memory is still 364.9 MB. Free memory was 325.5 MB in the beginning and 302.4 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 201398.82 ms. Allocated memory was 364.9 MB in the beginning and 1.2 GB in the end (delta: 803.2 MB). Free memory was 302.4 MB in the beginning and 502.6 MB in the end (delta: -200.1 MB). Peak memory consumption was 603.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; VAL [i=3, j=6] [L712] 0 pthread_t id1, id2; VAL [i=3, j=6] [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L716] 0 int condI = i >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1, k++=0] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0, k++=0] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2, k++=1] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2, k++=1] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2, k++=2] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3, k++=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=3, k++=3] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=3, k++=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=5, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=4] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=4, k++=4] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=5, k++=4] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=6] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=6, k++=5] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=6, k++=5] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=7, k=6] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=6] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=6, k++=6] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=7, k++=6] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=8, k=7] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=8] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=7, k++=7] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=7, k++=7] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=8] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=9, k=8] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=8] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=8, k++=8] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=9, k++=8] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L719] 0 int condJ = j >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L721] COND TRUE 0 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L722] 0 reach_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 201194.8ms, OverallIterations: 196, TraceHistogramMax: 10, EmptinessCheckTime: 446.3ms, AutomataDifference: 84975.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 102.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 19018 SDtfs, 139148 SDslu, 160827 SDs, 0 SdLazy, 29302 SolverSat, 19584 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17073.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25828 GetRequests, 18012 SyntacticMatches, 0 SemanticMatches, 7816 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81623 ImplicationChecksByTransitivity, 82815.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4093occurred in iteration=194, InterpolantAutomatonStates: 5848, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 6548.6ms AutomataMinimizationTime, 195 MinimizatonAttempts, 155540 StatesRemovedByMinimization, 195 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2192.9ms SsaConstructionTime, 5308.9ms SatisfiabilityAnalysisTime, 55481.6ms InterpolantComputationTime, 36484 NumberOfCodeBlocks, 36478 NumberOfCodeBlocksAsserted, 1031 NumberOfCheckSat, 35971 ConstructedInterpolants, 0 QuantifiedInterpolants, 148579 SizeOfPredicates, 2662 NumberOfNonLiveVariables, 37888 ConjunctsInSsa, 3764 ConjunctsInUnsatCore, 383 InterpolantComputations, 7 PerfectInterpolantSequences, 34/65760 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 proved your program to be incorrect! Received shutdown request...