/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 15:25:47,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 15:25:47,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 15:25:47,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-12 15:25:47,152 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-12 15:25:47,154 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-12 15:25:47,156 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-12 15:25:47,160 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-12 15:25:47,161 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-12 15:25:47,165 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-12 15:25:47,165 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-12 15:25:47,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-12 15:25:47,166 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-12 15:25:47,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-12 15:25:47,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-12 15:25:47,169 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-12 15:25:47,171 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-12 15:25:47,172 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-12 15:25:47,173 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-12 15:25:47,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-12 15:25:47,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-12 15:25:47,180 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-12 15:25:47,181 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-12 15:25:47,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-12 15:25:47,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-12 15:25:47,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-12 15:25:47,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-12 15:25:47,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-12 15:25:47,193 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 15:25:47,213 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 15:25:47,214 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 15:25:47,214 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 15:25:47,214 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 15:25:47,215 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 15:25:47,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 15:25:47,215 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 15:25:47,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 15:25:47,215 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 15:25:47,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 15:25:47,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 15:25:47,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 15:25:47,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 15:25:47,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 15:25:47,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 15:25:47,216 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 15:25:47,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 15:25:47,216 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 15:25:47,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 15:25:47,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 15:25:47,216 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 15:25:47,216 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 15:25:47,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 15:25:47,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 15:25:47,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 15:25:47,217 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 15:25:47,218 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 15:25:47,218 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 15:25:47,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 15:25:47,218 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 15:25:47,218 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 15:25:47,218 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 15:25:47,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 15:25:47,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 15:25:47,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 15:25:47,482 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-12 15:25:47,483 INFO L275 PluginConnector]: CDTParser initialized [2021-06-12 15:25:47,483 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2021-06-12 15:25:47,533 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7208c7f51/19726a983bf64e30ad7bfd29d64b7216/FLAG7146485c2 [2021-06-12 15:25:47,976 INFO L306 CDTParser]: Found 1 translation units. [2021-06-12 15:25:47,976 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2021-06-12 15:25:47,988 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7208c7f51/19726a983bf64e30ad7bfd29d64b7216/FLAG7146485c2 [2021-06-12 15:25:48,001 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7208c7f51/19726a983bf64e30ad7bfd29d64b7216 [2021-06-12 15:25:48,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 15:25:48,005 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-12 15:25:48,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-12 15:25:48,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-12 15:25:48,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-12 15:25:48,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.06 03:25:48" (1/1) ... [2021-06-12 15:25:48,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@435584e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:48, skipping insertion in model container [2021-06-12 15:25:48,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.06 03:25:48" (1/1) ... [2021-06-12 15:25:48,015 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-12 15:25:48,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-12 15:25:48,308 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-1.i[30961,30974] [2021-06-12 15:25:48,310 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-12 15:25:48,314 INFO L203 MainTranslator]: Completed pre-run [2021-06-12 15:25:48,336 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-1.i[30961,30974] [2021-06-12 15:25:48,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-12 15:25:48,377 INFO L208 MainTranslator]: Completed translation [2021-06-12 15:25:48,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:48 WrapperNode [2021-06-12 15:25:48,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-12 15:25:48,378 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 15:25:48,378 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 15:25:48,378 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 15:25:48,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:48" (1/1) ... [2021-06-12 15:25:48,396 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:48" (1/1) ... [2021-06-12 15:25:48,406 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 15:25:48,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 15:25:48,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 15:25:48,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 15:25:48,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:48" (1/1) ... [2021-06-12 15:25:48,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:48" (1/1) ... [2021-06-12 15:25:48,413 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:48" (1/1) ... [2021-06-12 15:25:48,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:48" (1/1) ... [2021-06-12 15:25:48,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:48" (1/1) ... [2021-06-12 15:25:48,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:48" (1/1) ... [2021-06-12 15:25:48,419 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:48" (1/1) ... [2021-06-12 15:25:48,420 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 15:25:48,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 15:25:48,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 15:25:48,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 15:25:48,421 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:48" (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 [2021-06-12 15:25:48,470 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-12 15:25:48,471 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-12 15:25:48,471 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-12 15:25:48,471 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-12 15:25:48,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-12 15:25:48,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-12 15:25:48,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-12 15:25:48,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-12 15:25:48,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-12 15:25:48,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-12 15:25:48,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 15:25:48,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 15:25:48,474 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 15:25:48,712 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 15:25:48,713 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-12 15:25:48,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 03:25:48 BoogieIcfgContainer [2021-06-12 15:25:48,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 15:25:48,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 15:25:48,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 15:25:48,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 15:25:48,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.06 03:25:48" (1/3) ... [2021-06-12 15:25:48,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@657240f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 03:25:48, skipping insertion in model container [2021-06-12 15:25:48,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:25:48" (2/3) ... [2021-06-12 15:25:48,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@657240f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 03:25:48, skipping insertion in model container [2021-06-12 15:25:48,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 03:25:48" (3/3) ... [2021-06-12 15:25:48,718 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2021-06-12 15:25:48,722 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 15:25:48,722 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 15:25:48,722 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 15:25:48,723 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 15:25:48,752 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,752 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,752 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,752 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,753 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,753 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,753 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,753 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,753 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,753 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,753 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,753 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,754 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,754 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,754 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,754 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,754 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,754 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,754 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,754 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,754 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,755 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,755 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,755 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,755 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,755 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,755 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,755 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,755 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,755 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,756 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,756 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,756 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,756 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,756 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,756 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,756 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,756 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,756 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,756 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,757 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,757 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,757 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,757 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,757 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,757 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,757 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,757 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,757 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,758 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,758 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,758 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,758 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,758 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,758 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,758 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,759 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,760 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,760 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,760 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,760 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,760 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,763 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,763 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,763 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,763 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,764 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,764 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:25:48,765 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-12 15:25:48,778 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 15:25:48,789 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 15:25:48,790 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 15:25:48,790 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 15:25:48,790 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 15:25:48,790 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 15:25:48,790 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 15:25:48,790 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 15:25:48,790 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 15:25:48,796 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-06-12 15:25:48,851 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) [2021-06-12 15:25:48,856 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) [2021-06-12 15:25:48,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 15:25:48,863 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:48,864 INFO L472 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] [2021-06-12 15:25:48,864 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:48,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:48,868 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-06-12 15:25:48,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:48,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987151285] [2021-06-12 15:25:48,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:49,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:49,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:49,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987151285] [2021-06-12 15:25:49,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987151285] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:25:49,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:25:49,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 15:25:49,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282425580] [2021-06-12 15:25:49,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 15:25:49,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:49,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 15:25:49,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-12 15:25:49,149 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) [2021-06-12 15:25:49,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:49,321 INFO L93 Difference]: Finished difference Result 3294 states and 9568 transitions. [2021-06-12 15:25:49,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 15:25:49,335 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 [2021-06-12 15:25:49,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:49,356 INFO L225 Difference]: With dead ends: 3294 [2021-06-12 15:25:49,357 INFO L226 Difference]: Without dead ends: 1248 [2021-06-12 15:25:49,357 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 15:25:49,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-12 15:25:49,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 800. [2021-06-12 15:25:49,452 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) [2021-06-12 15:25:49,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-06-12 15:25:49,456 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 32 [2021-06-12 15:25:49,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:49,457 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-06-12 15:25:49,457 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) [2021-06-12 15:25:49,457 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-06-12 15:25:49,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 15:25:49,463 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:49,463 INFO L472 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] [2021-06-12 15:25:49,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 15:25:49,464 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:49,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:49,467 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-06-12 15:25:49,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:49,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465199180] [2021-06-12 15:25:49,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:49,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:49,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:49,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:49,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465199180] [2021-06-12 15:25:49,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465199180] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:25:49,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:25:49,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 15:25:49,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074874001] [2021-06-12 15:25:49,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 15:25:49,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:49,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 15:25:49,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 15:25:49,569 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) [2021-06-12 15:25:49,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:49,660 INFO L93 Difference]: Finished difference Result 1302 states and 3436 transitions. [2021-06-12 15:25:49,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 15:25:49,661 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 [2021-06-12 15:25:49,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:49,666 INFO L225 Difference]: With dead ends: 1302 [2021-06-12 15:25:49,666 INFO L226 Difference]: Without dead ends: 920 [2021-06-12 15:25:49,667 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:25:49,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-12 15:25:49,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-06-12 15:25:49,685 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) [2021-06-12 15:25:49,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-06-12 15:25:49,688 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-06-12 15:25:49,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:49,688 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-06-12 15:25:49,688 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) [2021-06-12 15:25:49,688 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-06-12 15:25:49,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 15:25:49,690 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:49,690 INFO L472 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] [2021-06-12 15:25:49,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 15:25:49,690 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:49,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:49,690 INFO L82 PathProgramCache]: Analyzing trace with hash 93608864, now seen corresponding path program 1 times [2021-06-12 15:25:49,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:49,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650975601] [2021-06-12 15:25:49,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:49,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:49,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650975601] [2021-06-12 15:25:49,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650975601] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:25:49,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:25:49,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 15:25:49,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12420477] [2021-06-12 15:25:49,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 15:25:49,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:49,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 15:25:49,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-12 15:25:49,778 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) [2021-06-12 15:25:49,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:49,848 INFO L93 Difference]: Finished difference Result 1332 states and 3512 transitions. [2021-06-12 15:25:49,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 15:25:49,848 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 [2021-06-12 15:25:49,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:49,852 INFO L225 Difference]: With dead ends: 1332 [2021-06-12 15:25:49,852 INFO L226 Difference]: Without dead ends: 1072 [2021-06-12 15:25:49,853 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-12 15:25:49,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-06-12 15:25:49,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 876. [2021-06-12 15:25:49,869 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) [2021-06-12 15:25:49,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-06-12 15:25:49,872 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-06-12 15:25:49,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:49,872 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-06-12 15:25:49,872 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) [2021-06-12 15:25:49,872 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-06-12 15:25:49,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 15:25:49,875 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:49,875 INFO L472 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] [2021-06-12 15:25:49,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 15:25:49,875 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:49,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:49,876 INFO L82 PathProgramCache]: Analyzing trace with hash -466628886, now seen corresponding path program 2 times [2021-06-12 15:25:49,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:49,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726250473] [2021-06-12 15:25:49,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:49,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:50,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:50,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:50,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726250473] [2021-06-12 15:25:50,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726250473] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:25:50,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:25:50,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 15:25:50,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869565372] [2021-06-12 15:25:50,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 15:25:50,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:50,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 15:25:50,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 15:25:50,003 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) [2021-06-12 15:25:50,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:50,080 INFO L93 Difference]: Finished difference Result 1772 states and 4744 transitions. [2021-06-12 15:25:50,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 15:25:50,081 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 [2021-06-12 15:25:50,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:50,086 INFO L225 Difference]: With dead ends: 1772 [2021-06-12 15:25:50,086 INFO L226 Difference]: Without dead ends: 1505 [2021-06-12 15:25:50,086 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:25:50,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-06-12 15:25:50,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 975. [2021-06-12 15:25:50,104 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) [2021-06-12 15:25:50,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2628 transitions. [2021-06-12 15:25:50,106 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2628 transitions. Word has length 40 [2021-06-12 15:25:50,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:50,107 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 2628 transitions. [2021-06-12 15:25:50,107 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) [2021-06-12 15:25:50,107 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2628 transitions. [2021-06-12 15:25:50,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 15:25:50,108 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:50,108 INFO L472 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] [2021-06-12 15:25:50,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 15:25:50,108 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:50,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:50,109 INFO L82 PathProgramCache]: Analyzing trace with hash -78750066, now seen corresponding path program 3 times [2021-06-12 15:25:50,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:50,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916154663] [2021-06-12 15:25:50,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:50,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:50,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916154663] [2021-06-12 15:25:50,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916154663] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:25:50,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:25:50,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 15:25:50,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931217472] [2021-06-12 15:25:50,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 15:25:50,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:50,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 15:25:50,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-12 15:25:50,156 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) [2021-06-12 15:25:50,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:50,239 INFO L93 Difference]: Finished difference Result 2211 states and 5878 transitions. [2021-06-12 15:25:50,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 15:25:50,240 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 [2021-06-12 15:25:50,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:50,246 INFO L225 Difference]: With dead ends: 2211 [2021-06-12 15:25:50,246 INFO L226 Difference]: Without dead ends: 1944 [2021-06-12 15:25:50,247 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:25:50,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-06-12 15:25:50,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1127. [2021-06-12 15:25:50,270 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) [2021-06-12 15:25:50,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3119 transitions. [2021-06-12 15:25:50,273 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3119 transitions. Word has length 40 [2021-06-12 15:25:50,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:50,274 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3119 transitions. [2021-06-12 15:25:50,274 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) [2021-06-12 15:25:50,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3119 transitions. [2021-06-12 15:25:50,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 15:25:50,275 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:50,275 INFO L472 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] [2021-06-12 15:25:50,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 15:25:50,275 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:50,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:50,275 INFO L82 PathProgramCache]: Analyzing trace with hash -56406816, now seen corresponding path program 4 times [2021-06-12 15:25:50,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:50,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013688428] [2021-06-12 15:25:50,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:50,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:50,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:50,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013688428] [2021-06-12 15:25:50,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013688428] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:25:50,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:25:50,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 15:25:50,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672821635] [2021-06-12 15:25:50,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 15:25:50,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:50,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 15:25:50,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-12 15:25:50,326 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) [2021-06-12 15:25:50,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:50,437 INFO L93 Difference]: Finished difference Result 1671 states and 4527 transitions. [2021-06-12 15:25:50,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 15:25:50,438 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 [2021-06-12 15:25:50,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:50,442 INFO L225 Difference]: With dead ends: 1671 [2021-06-12 15:25:50,442 INFO L226 Difference]: Without dead ends: 1173 [2021-06-12 15:25:50,442 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:25:50,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-06-12 15:25:50,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 922. [2021-06-12 15:25:50,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 2.732899022801303) internal successors, (2517), 921 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:50,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 2517 transitions. [2021-06-12 15:25:50,460 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 2517 transitions. Word has length 40 [2021-06-12 15:25:50,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:50,460 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 2517 transitions. [2021-06-12 15:25:50,461 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) [2021-06-12 15:25:50,461 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 2517 transitions. [2021-06-12 15:25:50,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 15:25:50,462 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:50,463 INFO L472 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] [2021-06-12 15:25:50,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 15:25:50,463 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:50,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:50,464 INFO L82 PathProgramCache]: Analyzing trace with hash -709715269, now seen corresponding path program 1 times [2021-06-12 15:25:50,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:50,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198641188] [2021-06-12 15:25:50,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:50,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:50,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:50,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198641188] [2021-06-12 15:25:50,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198641188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:50,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182288802] [2021-06-12 15:25:50,562 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 [2021-06-12 15:25:50,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:50,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 15:25:50,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:50,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182288802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:50,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:50,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 15:25:50,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435001625] [2021-06-12 15:25:50,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 15:25:50,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:50,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 15:25:50,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:25:50,863 INFO L87 Difference]: Start difference. First operand 922 states and 2517 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:50,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:50,982 INFO L93 Difference]: Finished difference Result 1526 states and 4027 transitions. [2021-06-12 15:25:50,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 15:25:50,984 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have 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 [2021-06-12 15:25:50,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:50,989 INFO L225 Difference]: With dead ends: 1526 [2021-06-12 15:25:50,989 INFO L226 Difference]: Without dead ends: 1256 [2021-06-12 15:25:50,989 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:25:50,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-06-12 15:25:51,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1113. [2021-06-12 15:25:51,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1112 states have (on average 2.741007194244604) internal successors, (3048), 1112 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:51,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 3048 transitions. [2021-06-12 15:25:51,015 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 3048 transitions. Word has length 45 [2021-06-12 15:25:51,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:51,016 INFO L482 AbstractCegarLoop]: Abstraction has 1113 states and 3048 transitions. [2021-06-12 15:25:51,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:51,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 3048 transitions. [2021-06-12 15:25:51,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 15:25:51,018 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:51,018 INFO L472 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] [2021-06-12 15:25:51,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-12 15:25:51,225 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:51,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:51,225 INFO L82 PathProgramCache]: Analyzing trace with hash -321836449, now seen corresponding path program 2 times [2021-06-12 15:25:51,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:51,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152448535] [2021-06-12 15:25:51,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:51,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:51,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152448535] [2021-06-12 15:25:51,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152448535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:51,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443450035] [2021-06-12 15:25:51,276 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 [2021-06-12 15:25:51,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:25:51,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:51,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 15:25:51,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:51,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443450035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:51,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:51,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-12 15:25:51,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556217839] [2021-06-12 15:25:51,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 15:25:51,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:51,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 15:25:51,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-12 15:25:51,413 INFO L87 Difference]: Start difference. First operand 1113 states and 3048 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:51,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:51,532 INFO L93 Difference]: Finished difference Result 2408 states and 6431 transitions. [2021-06-12 15:25:51,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 15:25:51,532 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 [2021-06-12 15:25:51,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:51,539 INFO L225 Difference]: With dead ends: 2408 [2021-06-12 15:25:51,539 INFO L226 Difference]: Without dead ends: 2138 [2021-06-12 15:25:51,539 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:25:51,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-06-12 15:25:51,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1293. [2021-06-12 15:25:51,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 2.791795665634675) internal successors, (3607), 1292 states have internal predecessors, (3607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:51,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 3607 transitions. [2021-06-12 15:25:51,568 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 3607 transitions. Word has length 45 [2021-06-12 15:25:51,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:51,568 INFO L482 AbstractCegarLoop]: Abstraction has 1293 states and 3607 transitions. [2021-06-12 15:25:51,569 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) [2021-06-12 15:25:51,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 3607 transitions. [2021-06-12 15:25:51,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 15:25:51,570 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:51,570 INFO L472 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] [2021-06-12 15:25:51,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:51,785 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:51,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:51,785 INFO L82 PathProgramCache]: Analyzing trace with hash -299493199, now seen corresponding path program 3 times [2021-06-12 15:25:51,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:51,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50668064] [2021-06-12 15:25:51,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:51,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:51,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:51,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:51,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50668064] [2021-06-12 15:25:51,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50668064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:51,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860671223] [2021-06-12 15:25:51,839 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 [2021-06-12 15:25:51,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 15:25:51,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:51,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 15:25:51,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:51,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:51,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860671223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:51,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:51,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 15:25:51,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846644043] [2021-06-12 15:25:51,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 15:25:51,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:51,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 15:25:51,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:25:51,990 INFO L87 Difference]: Start difference. First operand 1293 states and 3607 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:52,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:52,234 INFO L93 Difference]: Finished difference Result 2196 states and 5861 transitions. [2021-06-12 15:25:52,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 15:25:52,234 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 [2021-06-12 15:25:52,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:52,239 INFO L225 Difference]: With dead ends: 2196 [2021-06-12 15:25:52,239 INFO L226 Difference]: Without dead ends: 1621 [2021-06-12 15:25:52,240 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 169.5ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:25:52,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-06-12 15:25:52,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1328. [2021-06-12 15:25:52,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 2.7754333082140166) internal successors, (3683), 1327 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:52,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 3683 transitions. [2021-06-12 15:25:52,264 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 3683 transitions. Word has length 45 [2021-06-12 15:25:52,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:52,264 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 3683 transitions. [2021-06-12 15:25:52,264 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) [2021-06-12 15:25:52,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 3683 transitions. [2021-06-12 15:25:52,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 15:25:52,266 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:52,266 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:25:52,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:52,484 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:52,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:52,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1925374875, now seen corresponding path program 1 times [2021-06-12 15:25:52,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:52,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46637529] [2021-06-12 15:25:52,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:52,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:52,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46637529] [2021-06-12 15:25:52,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46637529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:52,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217161109] [2021-06-12 15:25:52,598 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 [2021-06-12 15:25:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:52,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:25:52,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:52,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217161109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:52,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:52,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-12 15:25:52,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638134968] [2021-06-12 15:25:52,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:25:52,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:52,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:25:52,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:25:52,764 INFO L87 Difference]: Start difference. First operand 1328 states and 3683 transitions. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:52,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:52,898 INFO L93 Difference]: Finished difference Result 2068 states and 5483 transitions. [2021-06-12 15:25:52,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 15:25:52,898 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-12 15:25:52,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:52,903 INFO L225 Difference]: With dead ends: 2068 [2021-06-12 15:25:52,903 INFO L226 Difference]: Without dead ends: 1734 [2021-06-12 15:25:52,904 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:25:52,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-06-12 15:25:52,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1413. [2021-06-12 15:25:52,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 2.7287535410764874) internal successors, (3853), 1412 states have internal predecessors, (3853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:52,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 3853 transitions. [2021-06-12 15:25:52,937 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 3853 transitions. Word has length 50 [2021-06-12 15:25:52,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:52,938 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 3853 transitions. [2021-06-12 15:25:52,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:52,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 3853 transitions. [2021-06-12 15:25:52,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 15:25:52,940 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:52,940 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:25:53,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:53,153 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:53,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:53,153 INFO L82 PathProgramCache]: Analyzing trace with hash -558025153, now seen corresponding path program 2 times [2021-06-12 15:25:53,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:53,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370359145] [2021-06-12 15:25:53,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:53,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:53,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:53,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370359145] [2021-06-12 15:25:53,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370359145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:53,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659329559] [2021-06-12 15:25:53,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:53,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:25:53,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:53,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:25:53,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:53,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659329559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:53,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:53,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 15:25:53,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710954628] [2021-06-12 15:25:53,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 15:25:53,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:53,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 15:25:53,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-12 15:25:53,367 INFO L87 Difference]: Start difference. First operand 1413 states and 3853 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:53,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:53,451 INFO L93 Difference]: Finished difference Result 2061 states and 5277 transitions. [2021-06-12 15:25:53,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 15:25:53,451 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-12 15:25:53,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:53,469 INFO L225 Difference]: With dead ends: 2061 [2021-06-12 15:25:53,469 INFO L226 Difference]: Without dead ends: 1791 [2021-06-12 15:25:53,469 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:25:53,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2021-06-12 15:25:53,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1428. [2021-06-12 15:25:53,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.721093202522775) internal successors, (3883), 1427 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:53,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3883 transitions. [2021-06-12 15:25:53,492 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3883 transitions. Word has length 50 [2021-06-12 15:25:53,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:53,493 INFO L482 AbstractCegarLoop]: Abstraction has 1428 states and 3883 transitions. [2021-06-12 15:25:53,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:53,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3883 transitions. [2021-06-12 15:25:53,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 15:25:53,494 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:53,494 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:25:53,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-12 15:25:53,705 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:53,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:53,705 INFO L82 PathProgramCache]: Analyzing trace with hash -128271569, now seen corresponding path program 3 times [2021-06-12 15:25:53,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:53,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082283704] [2021-06-12 15:25:53,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:53,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:53,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:53,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082283704] [2021-06-12 15:25:53,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082283704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:53,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858185766] [2021-06-12 15:25:53,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:53,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 15:25:53,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:53,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:25:53,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:53,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858185766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:53,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:53,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 15:25:53,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551459736] [2021-06-12 15:25:53,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 15:25:53,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:53,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 15:25:53,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:25:53,938 INFO L87 Difference]: Start difference. First operand 1428 states and 3883 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:54,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:54,084 INFO L93 Difference]: Finished difference Result 2006 states and 5197 transitions. [2021-06-12 15:25:54,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 15:25:54,085 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-12 15:25:54,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:54,087 INFO L225 Difference]: With dead ends: 2006 [2021-06-12 15:25:54,088 INFO L226 Difference]: Without dead ends: 1736 [2021-06-12 15:25:54,088 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 124.3ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-06-12 15:25:54,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-06-12 15:25:54,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1428. [2021-06-12 15:25:54,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.7245970567624385) internal successors, (3888), 1427 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:54,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3888 transitions. [2021-06-12 15:25:54,110 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3888 transitions. Word has length 50 [2021-06-12 15:25:54,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:54,110 INFO L482 AbstractCegarLoop]: Abstraction has 1428 states and 3888 transitions. [2021-06-12 15:25:54,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:54,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3888 transitions. [2021-06-12 15:25:54,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 15:25:54,112 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:54,112 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:25:54,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:54,325 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:54,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:54,325 INFO L82 PathProgramCache]: Analyzing trace with hash -186005699, now seen corresponding path program 4 times [2021-06-12 15:25:54,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:54,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942190515] [2021-06-12 15:25:54,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:54,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:54,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:54,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942190515] [2021-06-12 15:25:54,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942190515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:54,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088595343] [2021-06-12 15:25:54,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:54,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:25:54,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:54,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:25:54,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:54,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:54,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088595343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:54,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:54,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 15:25:54,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698251432] [2021-06-12 15:25:54,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 15:25:54,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:54,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 15:25:54,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-12 15:25:54,542 INFO L87 Difference]: Start difference. First operand 1428 states and 3888 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:54,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:54,714 INFO L93 Difference]: Finished difference Result 2798 states and 7421 transitions. [2021-06-12 15:25:54,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 15:25:54,715 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-12 15:25:54,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:54,719 INFO L225 Difference]: With dead ends: 2798 [2021-06-12 15:25:54,719 INFO L226 Difference]: Without dead ends: 2528 [2021-06-12 15:25:54,719 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:25:54,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2021-06-12 15:25:54,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 1608. [2021-06-12 15:25:54,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 2.7672682016179215) internal successors, (4447), 1607 states have internal predecessors, (4447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:54,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 4447 transitions. [2021-06-12 15:25:54,748 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 4447 transitions. Word has length 50 [2021-06-12 15:25:54,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:54,749 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 4447 transitions. [2021-06-12 15:25:54,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:54,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 4447 transitions. [2021-06-12 15:25:54,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 15:25:54,750 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:54,751 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:25:54,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:54,967 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:54,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:54,968 INFO L82 PathProgramCache]: Analyzing trace with hash -163662449, now seen corresponding path program 5 times [2021-06-12 15:25:54,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:54,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130782310] [2021-06-12 15:25:54,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:54,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:55,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:55,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130782310] [2021-06-12 15:25:55,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130782310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:55,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037814269] [2021-06-12 15:25:55,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:55,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 15:25:55,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:55,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:25:55,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:55,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:55,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037814269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:55,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:55,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 15:25:55,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310491978] [2021-06-12 15:25:55,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 15:25:55,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:55,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 15:25:55,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:25:55,177 INFO L87 Difference]: Start difference. First operand 1608 states and 4447 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:55,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:55,366 INFO L93 Difference]: Finished difference Result 2285 states and 6121 transitions. [2021-06-12 15:25:55,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 15:25:55,367 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-12 15:25:55,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:55,369 INFO L225 Difference]: With dead ends: 2285 [2021-06-12 15:25:55,369 INFO L226 Difference]: Without dead ends: 1706 [2021-06-12 15:25:55,369 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 145.6ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:25:55,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2021-06-12 15:25:55,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1313. [2021-06-12 15:25:55,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1312 states have (on average 2.7271341463414633) internal successors, (3578), 1312 states have internal predecessors, (3578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:55,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 3578 transitions. [2021-06-12 15:25:55,388 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 3578 transitions. Word has length 50 [2021-06-12 15:25:55,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:55,388 INFO L482 AbstractCegarLoop]: Abstraction has 1313 states and 3578 transitions. [2021-06-12 15:25:55,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:55,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 3578 transitions. [2021-06-12 15:25:55,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:25:55,390 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:55,390 INFO L472 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] [2021-06-12 15:25:55,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-12 15:25:55,607 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:55,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:55,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1043607760, now seen corresponding path program 6 times [2021-06-12 15:25:55,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:55,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952163938] [2021-06-12 15:25:55,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:55,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:55,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952163938] [2021-06-12 15:25:55,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952163938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:55,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890911070] [2021-06-12 15:25:55,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:55,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 15:25:55,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:55,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:25:55,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:55,800 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:55,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890911070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:55,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:55,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-12 15:25:55,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581012847] [2021-06-12 15:25:55,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 15:25:55,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:55,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 15:25:55,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 15:25:55,801 INFO L87 Difference]: Start difference. First operand 1313 states and 3578 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:55,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:55,932 INFO L93 Difference]: Finished difference Result 1931 states and 5017 transitions. [2021-06-12 15:25:55,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 15:25:55,933 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 [2021-06-12 15:25:55,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:55,935 INFO L225 Difference]: With dead ends: 1931 [2021-06-12 15:25:55,935 INFO L226 Difference]: Without dead ends: 1661 [2021-06-12 15:25:55,935 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:25:55,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-06-12 15:25:55,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1388. [2021-06-12 15:25:55,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 2.741888968997837) internal successors, (3803), 1387 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:55,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 3803 transitions. [2021-06-12 15:25:55,954 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 3803 transitions. Word has length 55 [2021-06-12 15:25:55,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:55,955 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 3803 transitions. [2021-06-12 15:25:55,955 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) [2021-06-12 15:25:55,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 3803 transitions. [2021-06-12 15:25:55,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:25:55,956 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:55,956 INFO L472 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] [2021-06-12 15:25:56,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 15:25:56,175 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:56,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:56,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1473361344, now seen corresponding path program 7 times [2021-06-12 15:25:56,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:56,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4663815] [2021-06-12 15:25:56,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:56,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:56,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:56,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4663815] [2021-06-12 15:25:56,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4663815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:56,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290576959] [2021-06-12 15:25:56,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:56,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:56,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:25:56,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:56,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290576959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:56,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:56,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-12 15:25:56,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315233511] [2021-06-12 15:25:56,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:25:56,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:56,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:25:56,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:25:56,424 INFO L87 Difference]: Start difference. First operand 1388 states and 3803 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:56,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:56,643 INFO L93 Difference]: Finished difference Result 2111 states and 5497 transitions. [2021-06-12 15:25:56,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 15:25:56,643 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-12 15:25:56,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:56,646 INFO L225 Difference]: With dead ends: 2111 [2021-06-12 15:25:56,646 INFO L226 Difference]: Without dead ends: 1841 [2021-06-12 15:25:56,646 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 197.9ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:25:56,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2021-06-12 15:25:56,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1463. [2021-06-12 15:25:56,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 2.7688098495212037) internal successors, (4048), 1462 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:56,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 4048 transitions. [2021-06-12 15:25:56,668 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 4048 transitions. Word has length 55 [2021-06-12 15:25:56,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:56,668 INFO L482 AbstractCegarLoop]: Abstraction has 1463 states and 4048 transitions. [2021-06-12 15:25:56,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:56,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 4048 transitions. [2021-06-12 15:25:56,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:25:56,670 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:56,670 INFO L472 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] [2021-06-12 15:25:56,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-12 15:25:56,881 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:56,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:56,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1415627214, now seen corresponding path program 8 times [2021-06-12 15:25:56,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:56,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889412437] [2021-06-12 15:25:56,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:56,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:56,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889412437] [2021-06-12 15:25:56,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889412437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:56,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742300691] [2021-06-12 15:25:56,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:56,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:25:56,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:56,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:25:56,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:57,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:57,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742300691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:57,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:57,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-12 15:25:57,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991148027] [2021-06-12 15:25:57,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 15:25:57,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:57,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 15:25:57,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 15:25:57,060 INFO L87 Difference]: Start difference. First operand 1463 states and 4048 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:57,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:57,262 INFO L93 Difference]: Finished difference Result 2858 states and 7631 transitions. [2021-06-12 15:25:57,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 15:25:57,263 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 [2021-06-12 15:25:57,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:57,266 INFO L225 Difference]: With dead ends: 2858 [2021-06-12 15:25:57,266 INFO L226 Difference]: Without dead ends: 2588 [2021-06-12 15:25:57,267 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 158.1ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:25:57,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-06-12 15:25:57,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1643. [2021-06-12 15:25:57,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 2.805724725943971) internal successors, (4607), 1642 states have internal predecessors, (4607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:57,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 4607 transitions. [2021-06-12 15:25:57,297 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 4607 transitions. Word has length 55 [2021-06-12 15:25:57,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:57,297 INFO L482 AbstractCegarLoop]: Abstraction has 1643 states and 4607 transitions. [2021-06-12 15:25:57,297 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) [2021-06-12 15:25:57,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 4607 transitions. [2021-06-12 15:25:57,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 15:25:57,299 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:57,299 INFO L472 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] [2021-06-12 15:25:57,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 15:25:57,504 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:57,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:57,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1437970464, now seen corresponding path program 9 times [2021-06-12 15:25:57,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:57,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144629205] [2021-06-12 15:25:57,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:57,565 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:57,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:57,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144629205] [2021-06-12 15:25:57,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144629205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:57,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553204154] [2021-06-12 15:25:57,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:57,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 15:25:57,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:57,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:25:57,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:57,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553204154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:57,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:57,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-12 15:25:57,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791077332] [2021-06-12 15:25:57,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 15:25:57,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:57,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 15:25:57,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 15:25:57,710 INFO L87 Difference]: Start difference. First operand 1643 states and 4607 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) [2021-06-12 15:25:57,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:57,912 INFO L93 Difference]: Finished difference Result 2320 states and 6281 transitions. [2021-06-12 15:25:57,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 15:25:57,912 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 [2021-06-12 15:25:57,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:57,915 INFO L225 Difference]: With dead ends: 2320 [2021-06-12 15:25:57,916 INFO L226 Difference]: Without dead ends: 1831 [2021-06-12 15:25:57,916 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 174.3ms TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:25:57,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-06-12 15:25:57,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1234. [2021-06-12 15:25:57,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1233 states have (on average 2.72992700729927) internal successors, (3366), 1233 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:57,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 3366 transitions. [2021-06-12 15:25:57,933 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 3366 transitions. Word has length 55 [2021-06-12 15:25:57,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:57,933 INFO L482 AbstractCegarLoop]: Abstraction has 1234 states and 3366 transitions. [2021-06-12 15:25:57,933 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) [2021-06-12 15:25:57,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 3366 transitions. [2021-06-12 15:25:57,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-12 15:25:57,935 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:57,935 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:25:58,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 15:25:58,149 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:58,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:58,149 INFO L82 PathProgramCache]: Analyzing trace with hash -173240564, now seen corresponding path program 10 times [2021-06-12 15:25:58,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:58,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845253081] [2021-06-12 15:25:58,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:58,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:58,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845253081] [2021-06-12 15:25:58,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845253081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:58,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40962651] [2021-06-12 15:25:58,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:58,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:25:58,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:58,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:25:58,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:58,424 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:58,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40962651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:58,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:58,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-12 15:25:58,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151829236] [2021-06-12 15:25:58,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:25:58,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:58,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:25:58,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:25:58,426 INFO L87 Difference]: Start difference. First operand 1234 states and 3366 transitions. Second operand has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:58,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:58,627 INFO L93 Difference]: Finished difference Result 2024 states and 5266 transitions. [2021-06-12 15:25:58,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 15:25:58,627 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-12 15:25:58,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:58,629 INFO L225 Difference]: With dead ends: 2024 [2021-06-12 15:25:58,629 INFO L226 Difference]: Without dead ends: 1690 [2021-06-12 15:25:58,630 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 186.1ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:25:58,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2021-06-12 15:25:58,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1319. [2021-06-12 15:25:58,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 1318 states have (on average 2.6828528072837634) internal successors, (3536), 1318 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:58,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 3536 transitions. [2021-06-12 15:25:58,646 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 3536 transitions. Word has length 60 [2021-06-12 15:25:58,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:58,646 INFO L482 AbstractCegarLoop]: Abstraction has 1319 states and 3536 transitions. [2021-06-12 15:25:58,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:58,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 3536 transitions. [2021-06-12 15:25:58,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-12 15:25:58,647 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:58,648 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:25:58,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:58,861 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:58,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:58,861 INFO L82 PathProgramCache]: Analyzing trace with hash -722803536, now seen corresponding path program 11 times [2021-06-12 15:25:58,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:58,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499014521] [2021-06-12 15:25:58,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:58,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:58,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:58,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499014521] [2021-06-12 15:25:58,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499014521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:58,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040082050] [2021-06-12 15:25:58,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:58,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 15:25:58,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:58,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:25:58,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:59,066 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:59,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040082050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:59,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:59,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 15:25:59,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000246275] [2021-06-12 15:25:59,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:25:59,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:59,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:25:59,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:25:59,068 INFO L87 Difference]: Start difference. First operand 1319 states and 3536 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:59,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:59,205 INFO L93 Difference]: Finished difference Result 2246 states and 5647 transitions. [2021-06-12 15:25:59,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 15:25:59,205 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-12 15:25:59,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:59,208 INFO L225 Difference]: With dead ends: 2246 [2021-06-12 15:25:59,208 INFO L226 Difference]: Without dead ends: 1976 [2021-06-12 15:25:59,208 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 117.0ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:25:59,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-06-12 15:25:59,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1463. [2021-06-12 15:25:59,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 2.7038303693570453) internal successors, (3953), 1462 states have internal predecessors, (3953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:59,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 3953 transitions. [2021-06-12 15:25:59,227 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 3953 transitions. Word has length 60 [2021-06-12 15:25:59,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:59,227 INFO L482 AbstractCegarLoop]: Abstraction has 1463 states and 3953 transitions. [2021-06-12 15:25:59,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:59,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 3953 transitions. [2021-06-12 15:25:59,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-12 15:25:59,228 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:59,228 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:25:59,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:59,449 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:25:59,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:25:59,449 INFO L82 PathProgramCache]: Analyzing trace with hash -790954592, now seen corresponding path program 12 times [2021-06-12 15:25:59,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:25:59,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447034818] [2021-06-12 15:25:59,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:25:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:25:59,538 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:59,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:25:59,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447034818] [2021-06-12 15:25:59,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447034818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:59,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000167625] [2021-06-12 15:25:59,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:25:59,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 15:25:59,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:25:59,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:25:59,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:25:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:25:59,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000167625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:25:59,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:25:59,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 15:25:59,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863060878] [2021-06-12 15:25:59,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:25:59,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:25:59,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:25:59,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:25:59,697 INFO L87 Difference]: Start difference. First operand 1463 states and 3953 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:59,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:25:59,873 INFO L93 Difference]: Finished difference Result 2206 states and 5642 transitions. [2021-06-12 15:25:59,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 15:25:59,874 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-12 15:25:59,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:25:59,876 INFO L225 Difference]: With dead ends: 2206 [2021-06-12 15:25:59,876 INFO L226 Difference]: Without dead ends: 1936 [2021-06-12 15:25:59,876 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 163.8ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:25:59,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-06-12 15:25:59,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1538. [2021-06-12 15:25:59,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 2.718282368249837) internal successors, (4178), 1537 states have internal predecessors, (4178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:59,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 4178 transitions. [2021-06-12 15:25:59,895 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 4178 transitions. Word has length 60 [2021-06-12 15:25:59,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:25:59,895 INFO L482 AbstractCegarLoop]: Abstraction has 1538 states and 4178 transitions. [2021-06-12 15:25:59,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:25:59,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 4178 transitions. [2021-06-12 15:25:59,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-12 15:25:59,897 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:25:59,897 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:26:00,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-12 15:26:00,113 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:00,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:00,113 INFO L82 PathProgramCache]: Analyzing trace with hash -2087923666, now seen corresponding path program 13 times [2021-06-12 15:26:00,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:00,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144127132] [2021-06-12 15:26:00,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:00,172 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:00,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:00,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144127132] [2021-06-12 15:26:00,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144127132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:00,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855277340] [2021-06-12 15:26:00,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:00,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:26:00,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:00,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855277340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:00,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:00,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 15:26:00,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539903251] [2021-06-12 15:26:00,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:26:00,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:00,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:26:00,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:26:00,314 INFO L87 Difference]: Start difference. First operand 1538 states and 4178 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:00,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:00,473 INFO L93 Difference]: Finished difference Result 2256 states and 5817 transitions. [2021-06-12 15:26:00,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 15:26:00,474 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-12 15:26:00,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:00,476 INFO L225 Difference]: With dead ends: 2256 [2021-06-12 15:26:00,476 INFO L226 Difference]: Without dead ends: 1986 [2021-06-12 15:26:00,476 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 124.3ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:26:00,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2021-06-12 15:26:00,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1613. [2021-06-12 15:26:00,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 2.7313895781637716) internal successors, (4403), 1612 states have internal predecessors, (4403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:00,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 4403 transitions. [2021-06-12 15:26:00,496 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 4403 transitions. Word has length 60 [2021-06-12 15:26:00,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:00,496 INFO L482 AbstractCegarLoop]: Abstraction has 1613 states and 4403 transitions. [2021-06-12 15:26:00,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:00,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 4403 transitions. [2021-06-12 15:26:00,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-12 15:26:00,498 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:00,498 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:26:00,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:00,713 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:00,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:00,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1658170082, now seen corresponding path program 14 times [2021-06-12 15:26:00,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:00,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490114950] [2021-06-12 15:26:00,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:00,768 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:00,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:00,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490114950] [2021-06-12 15:26:00,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490114950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:00,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255749456] [2021-06-12 15:26:00,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:00,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:26:00,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:00,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:26:00,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:00,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:00,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255749456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:00,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:00,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 15:26:00,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321231574] [2021-06-12 15:26:00,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:26:00,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:00,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:26:00,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:26:00,916 INFO L87 Difference]: Start difference. First operand 1613 states and 4403 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:01,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:01,123 INFO L93 Difference]: Finished difference Result 2341 states and 6107 transitions. [2021-06-12 15:26:01,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:26:01,123 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-12 15:26:01,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:01,125 INFO L225 Difference]: With dead ends: 2341 [2021-06-12 15:26:01,125 INFO L226 Difference]: Without dead ends: 2071 [2021-06-12 15:26:01,126 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 182.4ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:26:01,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-06-12 15:26:01,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1688. [2021-06-12 15:26:01,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1687 states have (on average 2.7551867219917012) internal successors, (4648), 1687 states have internal predecessors, (4648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:01,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 4648 transitions. [2021-06-12 15:26:01,147 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 4648 transitions. Word has length 60 [2021-06-12 15:26:01,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:01,147 INFO L482 AbstractCegarLoop]: Abstraction has 1688 states and 4648 transitions. [2021-06-12 15:26:01,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:01,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 4648 transitions. [2021-06-12 15:26:01,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-12 15:26:01,149 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:01,149 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:26:01,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 15:26:01,366 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:01,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:01,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1715904212, now seen corresponding path program 15 times [2021-06-12 15:26:01,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:01,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454810823] [2021-06-12 15:26:01,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:01,427 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:01,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:01,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454810823] [2021-06-12 15:26:01,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454810823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:01,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528592836] [2021-06-12 15:26:01,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 15:26:01,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 15:26:01,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:01,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:26:01,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:01,569 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:01,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528592836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:01,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:01,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 15:26:01,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896919787] [2021-06-12 15:26:01,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:26:01,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:01,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:26:01,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:26:01,570 INFO L87 Difference]: Start difference. First operand 1688 states and 4648 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:01,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:01,736 INFO L93 Difference]: Finished difference Result 3108 states and 8281 transitions. [2021-06-12 15:26:01,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 15:26:01,736 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-12 15:26:01,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:01,739 INFO L225 Difference]: With dead ends: 3108 [2021-06-12 15:26:01,739 INFO L226 Difference]: Without dead ends: 2838 [2021-06-12 15:26:01,740 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 138.3ms TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:26:01,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2838 states. [2021-06-12 15:26:01,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2838 to 1868. [2021-06-12 15:26:01,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 2.78896625602571) internal successors, (5207), 1867 states have internal predecessors, (5207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:01,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 5207 transitions. [2021-06-12 15:26:01,768 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 5207 transitions. Word has length 60 [2021-06-12 15:26:01,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:01,768 INFO L482 AbstractCegarLoop]: Abstraction has 1868 states and 5207 transitions. [2021-06-12 15:26:01,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:01,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 5207 transitions. [2021-06-12 15:26:01,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-12 15:26:01,770 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:01,770 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:26:01,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-12 15:26:01,986 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:01,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:01,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1693560962, now seen corresponding path program 16 times [2021-06-12 15:26:01,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:01,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568493477] [2021-06-12 15:26:01,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:01,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:02,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:02,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568493477] [2021-06-12 15:26:02,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568493477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:02,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752230660] [2021-06-12 15:26:02,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:02,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:26:02,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:02,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:26:02,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:02,197 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:02,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752230660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:02,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:02,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 15:26:02,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113645946] [2021-06-12 15:26:02,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 15:26:02,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:02,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 15:26:02,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:26:02,199 INFO L87 Difference]: Start difference. First operand 1868 states and 5207 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:02,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:02,474 INFO L93 Difference]: Finished difference Result 2595 states and 6981 transitions. [2021-06-12 15:26:02,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 15:26:02,474 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-12 15:26:02,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:02,476 INFO L225 Difference]: With dead ends: 2595 [2021-06-12 15:26:02,476 INFO L226 Difference]: Without dead ends: 2106 [2021-06-12 15:26:02,476 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 234.7ms TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:26:02,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-06-12 15:26:02,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1513. [2021-06-12 15:26:02,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 2.7301587301587302) internal successors, (4128), 1512 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:02,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 4128 transitions. [2021-06-12 15:26:02,497 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 4128 transitions. Word has length 60 [2021-06-12 15:26:02,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:02,497 INFO L482 AbstractCegarLoop]: Abstraction has 1513 states and 4128 transitions. [2021-06-12 15:26:02,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:02,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 4128 transitions. [2021-06-12 15:26:02,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:26:02,499 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:02,499 INFO L472 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] [2021-06-12 15:26:02,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-12 15:26:02,713 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:02,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:02,713 INFO L82 PathProgramCache]: Analyzing trace with hash -2063950335, now seen corresponding path program 17 times [2021-06-12 15:26:02,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:02,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569108807] [2021-06-12 15:26:02,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:02,794 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:02,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:02,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569108807] [2021-06-12 15:26:02,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569108807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:02,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049767212] [2021-06-12 15:26:02,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:02,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 15:26:02,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:02,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:26:02,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:02,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049767212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:02,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:02,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 15:26:02,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133175970] [2021-06-12 15:26:02,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:26:02,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:02,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:26:02,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:26:02,951 INFO L87 Difference]: Start difference. First operand 1513 states and 4128 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) [2021-06-12 15:26:03,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:03,108 INFO L93 Difference]: Finished difference Result 2231 states and 5767 transitions. [2021-06-12 15:26:03,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 15:26:03,109 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 [2021-06-12 15:26:03,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:03,111 INFO L225 Difference]: With dead ends: 2231 [2021-06-12 15:26:03,111 INFO L226 Difference]: Without dead ends: 1961 [2021-06-12 15:26:03,111 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:26:03,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-06-12 15:26:03,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1588. [2021-06-12 15:26:03,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 2.742911153119093) internal successors, (4353), 1587 states have internal predecessors, (4353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:03,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 4353 transitions. [2021-06-12 15:26:03,131 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 4353 transitions. Word has length 65 [2021-06-12 15:26:03,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:03,131 INFO L482 AbstractCegarLoop]: Abstraction has 1588 states and 4353 transitions. [2021-06-12 15:26:03,131 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) [2021-06-12 15:26:03,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 4353 transitions. [2021-06-12 15:26:03,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:26:03,133 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:03,133 INFO L472 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] [2021-06-12 15:26:03,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-12 15:26:03,349 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:03,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:03,349 INFO L82 PathProgramCache]: Analyzing trace with hash -2132101391, now seen corresponding path program 18 times [2021-06-12 15:26:03,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:03,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97417641] [2021-06-12 15:26:03,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:03,426 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:03,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:03,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97417641] [2021-06-12 15:26:03,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97417641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:03,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028273162] [2021-06-12 15:26:03,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:03,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 15:26:03,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:03,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:26:03,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:03,608 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:03,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028273162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:03,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:03,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-12 15:26:03,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582550972] [2021-06-12 15:26:03,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:26:03,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:03,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:26:03,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:26:03,610 INFO L87 Difference]: Start difference. First operand 1588 states and 4353 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) [2021-06-12 15:26:03,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:03,820 INFO L93 Difference]: Finished difference Result 2401 states and 6182 transitions. [2021-06-12 15:26:03,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:26:03,820 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 [2021-06-12 15:26:03,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:03,822 INFO L225 Difference]: With dead ends: 2401 [2021-06-12 15:26:03,822 INFO L226 Difference]: Without dead ends: 2131 [2021-06-12 15:26:03,823 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 201.4ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:26:03,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2021-06-12 15:26:03,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1663. [2021-06-12 15:26:03,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 2.7545126353790614) internal successors, (4578), 1662 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:03,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 4578 transitions. [2021-06-12 15:26:03,843 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 4578 transitions. Word has length 65 [2021-06-12 15:26:03,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:03,843 INFO L482 AbstractCegarLoop]: Abstraction has 1663 states and 4578 transitions. [2021-06-12 15:26:03,843 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) [2021-06-12 15:26:03,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 4578 transitions. [2021-06-12 15:26:03,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:26:03,845 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:03,845 INFO L472 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] [2021-06-12 15:26:04,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 15:26:04,053 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:04,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:04,053 INFO L82 PathProgramCache]: Analyzing trace with hash 865896831, now seen corresponding path program 19 times [2021-06-12 15:26:04,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:04,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869594110] [2021-06-12 15:26:04,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:04,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:04,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869594110] [2021-06-12 15:26:04,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869594110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:04,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979039979] [2021-06-12 15:26:04,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:04,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:04,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:26:04,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:04,275 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:04,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979039979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:04,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:04,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 15:26:04,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108710427] [2021-06-12 15:26:04,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:26:04,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:04,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:26:04,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:26:04,277 INFO L87 Difference]: Start difference. First operand 1663 states and 4578 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) [2021-06-12 15:26:04,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:04,479 INFO L93 Difference]: Finished difference Result 2431 states and 6317 transitions. [2021-06-12 15:26:04,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 15:26:04,479 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 [2021-06-12 15:26:04,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:04,481 INFO L225 Difference]: With dead ends: 2431 [2021-06-12 15:26:04,481 INFO L226 Difference]: Without dead ends: 2161 [2021-06-12 15:26:04,481 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 166.3ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:26:04,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2021-06-12 15:26:04,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 1738. [2021-06-12 15:26:04,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 2.765112262521589) internal successors, (4803), 1737 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) [2021-06-12 15:26:04,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 4803 transitions. [2021-06-12 15:26:04,502 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 4803 transitions. Word has length 65 [2021-06-12 15:26:04,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:04,502 INFO L482 AbstractCegarLoop]: Abstraction has 1738 states and 4803 transitions. [2021-06-12 15:26:04,502 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) [2021-06-12 15:26:04,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 4803 transitions. [2021-06-12 15:26:04,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:26:04,504 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:04,504 INFO L472 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] [2021-06-12 15:26:04,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:04,713 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:04,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:04,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1295650415, now seen corresponding path program 20 times [2021-06-12 15:26:04,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:04,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539281726] [2021-06-12 15:26:04,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:04,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:04,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539281726] [2021-06-12 15:26:04,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539281726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:04,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4258314] [2021-06-12 15:26:04,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:04,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:26:04,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:04,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:26:04,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:04,921 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:04,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4258314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:04,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:04,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-12 15:26:04,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644350578] [2021-06-12 15:26:04,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:26:04,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:04,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:26:04,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:26:04,922 INFO L87 Difference]: Start difference. First operand 1738 states and 4803 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) [2021-06-12 15:26:05,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:05,194 INFO L93 Difference]: Finished difference Result 2516 states and 6607 transitions. [2021-06-12 15:26:05,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 15:26:05,195 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 [2021-06-12 15:26:05,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:05,197 INFO L225 Difference]: With dead ends: 2516 [2021-06-12 15:26:05,197 INFO L226 Difference]: Without dead ends: 2246 [2021-06-12 15:26:05,197 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 237.1ms TimeCoverageRelationStatistics Valid=218, Invalid=652, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:26:05,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-06-12 15:26:05,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 1813. [2021-06-12 15:26:05,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 2.7858719646799117) internal successors, (5048), 1812 states have internal predecessors, (5048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:05,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 5048 transitions. [2021-06-12 15:26:05,218 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 5048 transitions. Word has length 65 [2021-06-12 15:26:05,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:05,218 INFO L482 AbstractCegarLoop]: Abstraction has 1813 states and 5048 transitions. [2021-06-12 15:26:05,218 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) [2021-06-12 15:26:05,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 5048 transitions. [2021-06-12 15:26:05,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:26:05,219 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:05,219 INFO L472 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] [2021-06-12 15:26:05,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 15:26:05,420 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:05,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:05,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1237916285, now seen corresponding path program 21 times [2021-06-12 15:26:05,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:05,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510407796] [2021-06-12 15:26:05,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:05,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:05,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:05,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510407796] [2021-06-12 15:26:05,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510407796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:05,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479806882] [2021-06-12 15:26:05,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:05,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 15:26:05,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:05,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:26:05,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:05,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479806882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:05,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:05,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 15:26:05,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425880759] [2021-06-12 15:26:05,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:26:05,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:05,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:26:05,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:26:05,670 INFO L87 Difference]: Start difference. First operand 1813 states and 5048 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) [2021-06-12 15:26:05,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:05,895 INFO L93 Difference]: Finished difference Result 3258 states and 8731 transitions. [2021-06-12 15:26:05,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:26:05,896 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 [2021-06-12 15:26:05,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:05,900 INFO L225 Difference]: With dead ends: 3258 [2021-06-12 15:26:05,900 INFO L226 Difference]: Without dead ends: 2988 [2021-06-12 15:26:05,901 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 191.9ms TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:26:05,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2021-06-12 15:26:05,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 1993. [2021-06-12 15:26:05,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1993 states, 1992 states have (on average 2.8147590361445785) internal successors, (5607), 1992 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:05,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 5607 transitions. [2021-06-12 15:26:05,928 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 5607 transitions. Word has length 65 [2021-06-12 15:26:05,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:05,928 INFO L482 AbstractCegarLoop]: Abstraction has 1993 states and 5607 transitions. [2021-06-12 15:26:05,929 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) [2021-06-12 15:26:05,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 5607 transitions. [2021-06-12 15:26:05,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 15:26:05,930 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:05,930 INFO L472 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] [2021-06-12 15:26:06,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:06,131 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:06,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:06,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1260259535, now seen corresponding path program 22 times [2021-06-12 15:26:06,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:06,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608568429] [2021-06-12 15:26:06,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:06,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:06,204 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:06,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:06,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608568429] [2021-06-12 15:26:06,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608568429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:06,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615177519] [2021-06-12 15:26:06,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 15:26:06,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:26:06,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:06,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 15:26:06,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:06,345 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:06,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615177519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:06,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:06,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 15:26:06,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055992239] [2021-06-12 15:26:06,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:26:06,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:06,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:26:06,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:26:06,346 INFO L87 Difference]: Start difference. First operand 1993 states and 5607 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) [2021-06-12 15:26:06,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:06,606 INFO L93 Difference]: Finished difference Result 2720 states and 7381 transitions. [2021-06-12 15:26:06,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:26:06,607 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 [2021-06-12 15:26:06,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:06,609 INFO L225 Difference]: With dead ends: 2720 [2021-06-12 15:26:06,609 INFO L226 Difference]: Without dead ends: 2231 [2021-06-12 15:26:06,609 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 239.9ms TimeCoverageRelationStatistics Valid=256, Invalid=674, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:26:06,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-06-12 15:26:06,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 1434. [2021-06-12 15:26:06,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1433 states have (on average 2.732728541521284) internal successors, (3916), 1433 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:06,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 3916 transitions. [2021-06-12 15:26:06,625 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 3916 transitions. Word has length 65 [2021-06-12 15:26:06,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:06,625 INFO L482 AbstractCegarLoop]: Abstraction has 1434 states and 3916 transitions. [2021-06-12 15:26:06,625 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) [2021-06-12 15:26:06,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 3916 transitions. [2021-06-12 15:26:06,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:26:06,627 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:06,627 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:26:06,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-12 15:26:06,836 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:06,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:06,836 INFO L82 PathProgramCache]: Analyzing trace with hash 632250685, now seen corresponding path program 23 times [2021-06-12 15:26:06,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:06,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339810835] [2021-06-12 15:26:06,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:06,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:06,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339810835] [2021-06-12 15:26:06,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339810835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:06,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203321176] [2021-06-12 15:26:06,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:06,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 15:26:06,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:06,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:26:06,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:07,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203321176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:07,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:07,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-06-12 15:26:07,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183286481] [2021-06-12 15:26:07,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:26:07,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:07,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:26:07,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:26:07,102 INFO L87 Difference]: Start difference. First operand 1434 states and 3916 transitions. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:07,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:07,330 INFO L93 Difference]: Finished difference Result 2274 states and 5916 transitions. [2021-06-12 15:26:07,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:26:07,331 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-12 15:26:07,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:07,332 INFO L225 Difference]: With dead ends: 2274 [2021-06-12 15:26:07,332 INFO L226 Difference]: Without dead ends: 1940 [2021-06-12 15:26:07,333 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 231.0ms TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:26:07,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-06-12 15:26:07,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1519. [2021-06-12 15:26:07,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 2.691699604743083) internal successors, (4086), 1518 states have internal predecessors, (4086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:07,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 4086 transitions. [2021-06-12 15:26:07,349 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 4086 transitions. Word has length 70 [2021-06-12 15:26:07,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:07,349 INFO L482 AbstractCegarLoop]: Abstraction has 1519 states and 4086 transitions. [2021-06-12 15:26:07,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:07,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 4086 transitions. [2021-06-12 15:26:07,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:26:07,350 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:07,350 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:26:07,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:07,551 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:07,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:07,551 INFO L82 PathProgramCache]: Analyzing trace with hash -515245599, now seen corresponding path program 24 times [2021-06-12 15:26:07,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:07,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347828537] [2021-06-12 15:26:07,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:07,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:07,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347828537] [2021-06-12 15:26:07,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347828537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:07,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907806226] [2021-06-12 15:26:07,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:07,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 15:26:07,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:07,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:26:07,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:07,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907806226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:07,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:07,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 15:26:07,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024432772] [2021-06-12 15:26:07,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:26:07,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:07,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:26:07,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:26:07,778 INFO L87 Difference]: Start difference. First operand 1519 states and 4086 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:07,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:07,934 INFO L93 Difference]: Finished difference Result 2596 states and 6497 transitions. [2021-06-12 15:26:07,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 15:26:07,934 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-12 15:26:07,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:07,936 INFO L225 Difference]: With dead ends: 2596 [2021-06-12 15:26:07,936 INFO L226 Difference]: Without dead ends: 2326 [2021-06-12 15:26:07,941 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 146.8ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:26:07,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2326 states. [2021-06-12 15:26:07,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2326 to 1663. [2021-06-12 15:26:07,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 2.7093862815884475) internal successors, (4503), 1662 states have internal predecessors, (4503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:07,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 4503 transitions. [2021-06-12 15:26:07,960 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 4503 transitions. Word has length 70 [2021-06-12 15:26:07,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:07,960 INFO L482 AbstractCegarLoop]: Abstraction has 1663 states and 4503 transitions. [2021-06-12 15:26:07,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:07,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 4503 transitions. [2021-06-12 15:26:07,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:26:07,962 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:07,962 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:26:08,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-12 15:26:08,162 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:08,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:08,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1201428783, now seen corresponding path program 25 times [2021-06-12 15:26:08,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:08,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851671162] [2021-06-12 15:26:08,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:08,251 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:08,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:08,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851671162] [2021-06-12 15:26:08,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851671162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:08,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017321210] [2021-06-12 15:26:08,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:08,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:26:08,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:08,406 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:08,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017321210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:08,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:08,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-12 15:26:08,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100436726] [2021-06-12 15:26:08,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:26:08,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:08,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:26:08,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:26:08,408 INFO L87 Difference]: Start difference. First operand 1663 states and 4503 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:08,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:08,627 INFO L93 Difference]: Finished difference Result 2556 states and 6492 transitions. [2021-06-12 15:26:08,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:26:08,627 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-12 15:26:08,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:08,629 INFO L225 Difference]: With dead ends: 2556 [2021-06-12 15:26:08,629 INFO L226 Difference]: Without dead ends: 2286 [2021-06-12 15:26:08,630 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 218.7ms TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:26:08,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2021-06-12 15:26:08,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 1738. [2021-06-12 15:26:08,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 2.7219343696027636) internal successors, (4728), 1737 states have internal predecessors, (4728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:08,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 4728 transitions. [2021-06-12 15:26:08,650 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 4728 transitions. Word has length 70 [2021-06-12 15:26:08,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:08,651 INFO L482 AbstractCegarLoop]: Abstraction has 1738 states and 4728 transitions. [2021-06-12 15:26:08,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:08,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 4728 transitions. [2021-06-12 15:26:08,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:26:08,653 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:08,653 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:26:08,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:08,870 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:08,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:08,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1286463521, now seen corresponding path program 26 times [2021-06-12 15:26:08,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:08,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048136842] [2021-06-12 15:26:08,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:08,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:08,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048136842] [2021-06-12 15:26:08,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048136842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:08,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750405033] [2021-06-12 15:26:08,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:09,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:26:09,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:09,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:26:09,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:09,097 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:09,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750405033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:09,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:09,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 15:26:09,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73813667] [2021-06-12 15:26:09,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:26:09,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:09,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:26:09,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:26:09,098 INFO L87 Difference]: Start difference. First operand 1738 states and 4728 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:09,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:09,268 INFO L93 Difference]: Finished difference Result 2606 states and 6667 transitions. [2021-06-12 15:26:09,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 15:26:09,268 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-12 15:26:09,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:09,271 INFO L225 Difference]: With dead ends: 2606 [2021-06-12 15:26:09,271 INFO L226 Difference]: Without dead ends: 2336 [2021-06-12 15:26:09,271 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 160.7ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-06-12 15:26:09,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-06-12 15:26:09,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1813. [2021-06-12 15:26:09,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 2.7334437086092715) internal successors, (4953), 1812 states have internal predecessors, (4953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:09,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 4953 transitions. [2021-06-12 15:26:09,291 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 4953 transitions. Word has length 70 [2021-06-12 15:26:09,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:09,291 INFO L482 AbstractCegarLoop]: Abstraction has 1813 states and 4953 transitions. [2021-06-12 15:26:09,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:09,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 4953 transitions. [2021-06-12 15:26:09,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:26:09,293 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:09,293 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:26:09,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-12 15:26:09,504 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:09,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:09,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1354614577, now seen corresponding path program 27 times [2021-06-12 15:26:09,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:09,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123597116] [2021-06-12 15:26:09,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:09,586 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:09,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:09,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123597116] [2021-06-12 15:26:09,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123597116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:09,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069639248] [2021-06-12 15:26:09,586 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 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 [2021-06-12 15:26:09,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 15:26:09,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:09,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:26:09,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:09,775 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:09,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069639248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:09,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:09,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-12 15:26:09,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120670793] [2021-06-12 15:26:09,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:26:09,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:09,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:26:09,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:26:09,776 INFO L87 Difference]: Start difference. First operand 1813 states and 4953 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:10,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:10,058 INFO L93 Difference]: Finished difference Result 2631 states and 6792 transitions. [2021-06-12 15:26:10,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 15:26:10,058 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-12 15:26:10,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:10,060 INFO L225 Difference]: With dead ends: 2631 [2021-06-12 15:26:10,060 INFO L226 Difference]: Without dead ends: 2361 [2021-06-12 15:26:10,061 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 252.0ms TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:26:10,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-06-12 15:26:10,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1888. [2021-06-12 15:26:10,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 2.7440381558028615) internal successors, (5178), 1887 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:10,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 5178 transitions. [2021-06-12 15:26:10,080 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 5178 transitions. Word has length 70 [2021-06-12 15:26:10,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:10,080 INFO L482 AbstractCegarLoop]: Abstraction has 1888 states and 5178 transitions. [2021-06-12 15:26:10,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:10,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 5178 transitions. [2021-06-12 15:26:10,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:26:10,082 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:10,082 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:26:10,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:10,289 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:10,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:10,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1643383645, now seen corresponding path program 28 times [2021-06-12 15:26:10,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:10,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058829663] [2021-06-12 15:26:10,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:10,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:10,363 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:10,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:10,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058829663] [2021-06-12 15:26:10,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058829663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:10,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730203651] [2021-06-12 15:26:10,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:10,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:26:10,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:10,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:26:10,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:10,510 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:10,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730203651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:10,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:10,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 15:26:10,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963216411] [2021-06-12 15:26:10,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:26:10,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:10,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:26:10,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:26:10,512 INFO L87 Difference]: Start difference. First operand 1888 states and 5178 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:10,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:10,705 INFO L93 Difference]: Finished difference Result 2656 states and 6917 transitions. [2021-06-12 15:26:10,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 15:26:10,705 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-12 15:26:10,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:10,708 INFO L225 Difference]: With dead ends: 2656 [2021-06-12 15:26:10,708 INFO L226 Difference]: Without dead ends: 2386 [2021-06-12 15:26:10,708 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 170.4ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:26:10,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2021-06-12 15:26:10,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 1963. [2021-06-12 15:26:10,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 2.753822629969419) internal successors, (5403), 1962 states have internal predecessors, (5403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:10,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 5403 transitions. [2021-06-12 15:26:10,739 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 5403 transitions. Word has length 70 [2021-06-12 15:26:10,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:10,739 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 5403 transitions. [2021-06-12 15:26:10,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:10,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 5403 transitions. [2021-06-12 15:26:10,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:26:10,741 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:10,741 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:26:10,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 15:26:10,941 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:10,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:10,942 INFO L82 PathProgramCache]: Analyzing trace with hash 2073137229, now seen corresponding path program 29 times [2021-06-12 15:26:10,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:10,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579527001] [2021-06-12 15:26:10,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:10,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:11,011 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:11,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:11,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579527001] [2021-06-12 15:26:11,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579527001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:11,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31821397] [2021-06-12 15:26:11,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:11,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 15:26:11,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:11,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:26:11,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:11,166 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:11,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31821397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:11,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:11,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-12 15:26:11,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349718935] [2021-06-12 15:26:11,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:26:11,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:11,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:26:11,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:26:11,167 INFO L87 Difference]: Start difference. First operand 1963 states and 5403 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:11,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:11,463 INFO L93 Difference]: Finished difference Result 2741 states and 7207 transitions. [2021-06-12 15:26:11,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:26:11,464 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-12 15:26:11,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:11,466 INFO L225 Difference]: With dead ends: 2741 [2021-06-12 15:26:11,466 INFO L226 Difference]: Without dead ends: 2471 [2021-06-12 15:26:11,466 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 267.0ms TimeCoverageRelationStatistics Valid=267, Invalid=789, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:26:11,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2021-06-12 15:26:11,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2038. [2021-06-12 15:26:11,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2038 states, 2037 states have (on average 2.7727049582719685) internal successors, (5648), 2037 states have internal predecessors, (5648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:11,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 5648 transitions. [2021-06-12 15:26:11,488 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 5648 transitions. Word has length 70 [2021-06-12 15:26:11,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:11,489 INFO L482 AbstractCegarLoop]: Abstraction has 2038 states and 5648 transitions. [2021-06-12 15:26:11,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:11,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 5648 transitions. [2021-06-12 15:26:11,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:26:11,491 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:11,491 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:26:11,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-12 15:26:11,691 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:11,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:11,692 INFO L82 PathProgramCache]: Analyzing trace with hash 2015403099, now seen corresponding path program 30 times [2021-06-12 15:26:11,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:11,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15814249] [2021-06-12 15:26:11,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:11,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:11,757 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:11,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:11,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15814249] [2021-06-12 15:26:11,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15814249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:11,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186801239] [2021-06-12 15:26:11,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:11,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 15:26:11,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:11,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:26:11,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:11,936 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:11,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186801239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:11,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:11,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 15:26:11,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220912098] [2021-06-12 15:26:11,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:26:11,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:11,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:26:11,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:26:11,938 INFO L87 Difference]: Start difference. First operand 2038 states and 5648 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:12,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:12,194 INFO L93 Difference]: Finished difference Result 3508 states and 9381 transitions. [2021-06-12 15:26:12,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:26:12,194 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-12 15:26:12,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:12,198 INFO L225 Difference]: With dead ends: 3508 [2021-06-12 15:26:12,198 INFO L226 Difference]: Without dead ends: 3238 [2021-06-12 15:26:12,198 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 224.3ms TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:26:12,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3238 states. [2021-06-12 15:26:12,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3238 to 2218. [2021-06-12 15:26:12,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 2.7997293640054126) internal successors, (6207), 2217 states have internal predecessors, (6207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:12,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 6207 transitions. [2021-06-12 15:26:12,229 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 6207 transitions. Word has length 70 [2021-06-12 15:26:12,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:12,233 INFO L482 AbstractCegarLoop]: Abstraction has 2218 states and 6207 transitions. [2021-06-12 15:26:12,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:12,233 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 6207 transitions. [2021-06-12 15:26:12,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 15:26:12,236 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:12,236 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:26:12,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-12 15:26:12,452 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:12,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:12,452 INFO L82 PathProgramCache]: Analyzing trace with hash 2037746349, now seen corresponding path program 31 times [2021-06-12 15:26:12,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:12,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268898022] [2021-06-12 15:26:12,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:12,531 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:12,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:12,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268898022] [2021-06-12 15:26:12,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268898022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:12,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498076496] [2021-06-12 15:26:12,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:12,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 15:26:12,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:12,678 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:12,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498076496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:12,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:12,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-12 15:26:12,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713664871] [2021-06-12 15:26:12,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:26:12,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:12,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:26:12,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:26:12,679 INFO L87 Difference]: Start difference. First operand 2218 states and 6207 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:13,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:13,051 INFO L93 Difference]: Finished difference Result 3451 states and 9241 transitions. [2021-06-12 15:26:13,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 15:26:13,051 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-12 15:26:13,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:13,054 INFO L225 Difference]: With dead ends: 3451 [2021-06-12 15:26:13,054 INFO L226 Difference]: Without dead ends: 2876 [2021-06-12 15:26:13,054 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 331.2ms TimeCoverageRelationStatistics Valid=357, Invalid=1049, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:26:13,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-06-12 15:26:13,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2253. [2021-06-12 15:26:13,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:13,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-06-12 15:26:13,080 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 70 [2021-06-12 15:26:13,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:13,080 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-06-12 15:26:13,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:13,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-06-12 15:26:13,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:26:13,083 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:13,083 INFO L472 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] [2021-06-12 15:26:13,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 15:26:13,283 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:13,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:13,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1814233586, now seen corresponding path program 32 times [2021-06-12 15:26:13,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:13,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251085390] [2021-06-12 15:26:13,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:13,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:13,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251085390] [2021-06-12 15:26:13,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251085390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:13,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690951723] [2021-06-12 15:26:13,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:13,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:26:13,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:13,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:26:13,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:13,561 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:13,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690951723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:13,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:13,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 15:26:13,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5286356] [2021-06-12 15:26:13,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:26:13,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:13,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:26:13,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:26:13,562 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 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) [2021-06-12 15:26:13,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:13,744 INFO L93 Difference]: Finished difference Result 2996 states and 7897 transitions. [2021-06-12 15:26:13,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:26:13,744 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 [2021-06-12 15:26:13,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:13,747 INFO L225 Difference]: With dead ends: 2996 [2021-06-12 15:26:13,747 INFO L226 Difference]: Without dead ends: 2726 [2021-06-12 15:26:13,747 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 208.9ms TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:26:13,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2021-06-12 15:26:13,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 2253. [2021-06-12 15:26:13,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:13,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-06-12 15:26:13,768 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 75 [2021-06-12 15:26:13,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:13,768 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-06-12 15:26:13,768 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) [2021-06-12 15:26:13,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-06-12 15:26:13,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:26:13,770 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:13,770 INFO L472 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] [2021-06-12 15:26:13,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:13,971 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:13,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:13,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1128050402, now seen corresponding path program 33 times [2021-06-12 15:26:13,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:13,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089676717] [2021-06-12 15:26:13,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:14,054 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:14,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:14,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089676717] [2021-06-12 15:26:14,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089676717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:14,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012830114] [2021-06-12 15:26:14,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:14,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 15:26:14,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:14,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:26:14,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:14,208 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:14,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012830114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:14,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:14,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 15:26:14,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18449011] [2021-06-12 15:26:14,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:26:14,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:14,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:26:14,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:26:14,209 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 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) [2021-06-12 15:26:14,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:14,479 INFO L93 Difference]: Finished difference Result 3141 states and 8187 transitions. [2021-06-12 15:26:14,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 15:26:14,480 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 [2021-06-12 15:26:14,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:14,482 INFO L225 Difference]: With dead ends: 3141 [2021-06-12 15:26:14,483 INFO L226 Difference]: Without dead ends: 2871 [2021-06-12 15:26:14,483 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 240.0ms TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:26:14,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2021-06-12 15:26:14,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2253. [2021-06-12 15:26:14,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:14,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-06-12 15:26:14,508 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 75 [2021-06-12 15:26:14,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:14,508 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-06-12 15:26:14,508 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) [2021-06-12 15:26:14,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-06-12 15:26:14,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:26:14,511 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:14,511 INFO L472 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] [2021-06-12 15:26:14,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-12 15:26:14,728 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:14,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:14,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1043015664, now seen corresponding path program 34 times [2021-06-12 15:26:14,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:14,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561034884] [2021-06-12 15:26:14,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:14,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:14,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:14,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561034884] [2021-06-12 15:26:14,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561034884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:14,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250771640] [2021-06-12 15:26:14,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 15:26:14,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:26:14,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:14,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:26:14,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:14,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250771640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:14,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:14,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 15:26:14,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969284968] [2021-06-12 15:26:14,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:26:14,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:14,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:26:14,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:26:14,964 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 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) [2021-06-12 15:26:15,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:15,170 INFO L93 Difference]: Finished difference Result 3096 states and 8097 transitions. [2021-06-12 15:26:15,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:26:15,170 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 [2021-06-12 15:26:15,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:15,173 INFO L225 Difference]: With dead ends: 3096 [2021-06-12 15:26:15,173 INFO L226 Difference]: Without dead ends: 2826 [2021-06-12 15:26:15,173 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 189.9ms TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:26:15,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2021-06-12 15:26:15,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2253. [2021-06-12 15:26:15,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:15,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-06-12 15:26:15,194 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 75 [2021-06-12 15:26:15,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:15,194 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-06-12 15:26:15,194 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) [2021-06-12 15:26:15,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-06-12 15:26:15,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:26:15,196 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:15,196 INFO L472 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] [2021-06-12 15:26:15,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-12 15:26:15,410 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:15,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:15,411 INFO L82 PathProgramCache]: Analyzing trace with hash 974864608, now seen corresponding path program 35 times [2021-06-12 15:26:15,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:15,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998443461] [2021-06-12 15:26:15,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:15,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:15,488 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:15,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:15,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998443461] [2021-06-12 15:26:15,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998443461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:15,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626455714] [2021-06-12 15:26:15,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:15,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 15:26:15,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:15,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:26:15,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:15,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626455714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:15,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:15,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 15:26:15,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615996436] [2021-06-12 15:26:15,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:26:15,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:15,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:26:15,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:26:15,641 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 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) [2021-06-12 15:26:15,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:15,922 INFO L93 Difference]: Finished difference Result 3046 states and 7997 transitions. [2021-06-12 15:26:15,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:26:15,922 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 [2021-06-12 15:26:15,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:15,925 INFO L225 Difference]: With dead ends: 3046 [2021-06-12 15:26:15,925 INFO L226 Difference]: Without dead ends: 2776 [2021-06-12 15:26:15,925 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 257.1ms TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:26:15,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-06-12 15:26:15,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2253. [2021-06-12 15:26:15,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:15,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-06-12 15:26:15,948 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 75 [2021-06-12 15:26:15,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:15,948 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-06-12 15:26:15,948 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) [2021-06-12 15:26:15,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-06-12 15:26:15,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:26:15,950 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:15,950 INFO L472 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] [2021-06-12 15:26:16,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:16,166 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:16,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:16,167 INFO L82 PathProgramCache]: Analyzing trace with hash -322104466, now seen corresponding path program 36 times [2021-06-12 15:26:16,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:16,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022722645] [2021-06-12 15:26:16,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:16,242 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:16,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:16,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022722645] [2021-06-12 15:26:16,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022722645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:16,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278574665] [2021-06-12 15:26:16,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:16,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 15:26:16,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:16,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:26:16,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:16,385 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:16,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278574665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:16,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:16,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 15:26:16,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015910886] [2021-06-12 15:26:16,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:26:16,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:16,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:26:16,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:26:16,386 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 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) [2021-06-12 15:26:16,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:16,627 INFO L93 Difference]: Finished difference Result 2996 states and 7897 transitions. [2021-06-12 15:26:16,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 15:26:16,628 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 [2021-06-12 15:26:16,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:16,630 INFO L225 Difference]: With dead ends: 2996 [2021-06-12 15:26:16,630 INFO L226 Difference]: Without dead ends: 2726 [2021-06-12 15:26:16,631 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 208.5ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:26:16,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2021-06-12 15:26:16,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 2253. [2021-06-12 15:26:16,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:16,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-06-12 15:26:16,652 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 75 [2021-06-12 15:26:16,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:16,652 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-06-12 15:26:16,652 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) [2021-06-12 15:26:16,652 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-06-12 15:26:16,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:26:16,654 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:16,654 INFO L472 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] [2021-06-12 15:26:16,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-12 15:26:16,855 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:16,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:16,855 INFO L82 PathProgramCache]: Analyzing trace with hash 107649118, now seen corresponding path program 37 times [2021-06-12 15:26:16,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:16,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488288817] [2021-06-12 15:26:16,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:16,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:16,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488288817] [2021-06-12 15:26:16,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488288817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:16,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301119968] [2021-06-12 15:26:16,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 15:26:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:16,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:26:16,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:17,099 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:17,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301119968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:17,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:17,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 15:26:17,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122106296] [2021-06-12 15:26:17,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:26:17,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:17,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:26:17,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:26:17,100 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 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) [2021-06-12 15:26:17,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:17,408 INFO L93 Difference]: Finished difference Result 3006 states and 7947 transitions. [2021-06-12 15:26:17,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:26:17,408 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 [2021-06-12 15:26:17,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:17,411 INFO L225 Difference]: With dead ends: 3006 [2021-06-12 15:26:17,411 INFO L226 Difference]: Without dead ends: 2736 [2021-06-12 15:26:17,411 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 276.3ms TimeCoverageRelationStatistics Valid=301, Invalid=889, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:26:17,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-06-12 15:26:17,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2253. [2021-06-12 15:26:17,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7921847246891653) internal successors, (6288), 2252 states have internal predecessors, (6288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:17,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6288 transitions. [2021-06-12 15:26:17,432 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6288 transitions. Word has length 75 [2021-06-12 15:26:17,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:17,432 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6288 transitions. [2021-06-12 15:26:17,432 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) [2021-06-12 15:26:17,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6288 transitions. [2021-06-12 15:26:17,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:26:17,434 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:17,434 INFO L472 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] [2021-06-12 15:26:17,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:17,635 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:17,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:17,635 INFO L82 PathProgramCache]: Analyzing trace with hash 49914988, now seen corresponding path program 38 times [2021-06-12 15:26:17,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:17,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999593677] [2021-06-12 15:26:17,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:17,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:17,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999593677] [2021-06-12 15:26:17,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999593677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:17,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423970627] [2021-06-12 15:26:17,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:17,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:26:17,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:17,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:26:17,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:17,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423970627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:17,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:17,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 15:26:17,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896908392] [2021-06-12 15:26:17,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 15:26:17,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:17,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 15:26:17,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 15:26:17,849 INFO L87 Difference]: Start difference. First operand 2253 states and 6288 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) [2021-06-12 15:26:18,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:18,114 INFO L93 Difference]: Finished difference Result 3748 states and 10071 transitions. [2021-06-12 15:26:18,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:26:18,115 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 [2021-06-12 15:26:18,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:18,118 INFO L225 Difference]: With dead ends: 3748 [2021-06-12 15:26:18,118 INFO L226 Difference]: Without dead ends: 3478 [2021-06-12 15:26:18,118 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 233.6ms TimeCoverageRelationStatistics Valid=340, Invalid=850, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:26:18,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-06-12 15:26:18,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 2433. [2021-06-12 15:26:18,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 2432 states have (on average 2.815378289473684) internal successors, (6847), 2432 states have internal predecessors, (6847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:18,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 6847 transitions. [2021-06-12 15:26:18,145 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 6847 transitions. Word has length 75 [2021-06-12 15:26:18,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:18,145 INFO L482 AbstractCegarLoop]: Abstraction has 2433 states and 6847 transitions. [2021-06-12 15:26:18,146 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) [2021-06-12 15:26:18,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 6847 transitions. [2021-06-12 15:26:18,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 15:26:18,148 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:18,148 INFO L472 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] [2021-06-12 15:26:18,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-12 15:26:18,361 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:18,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:18,361 INFO L82 PathProgramCache]: Analyzing trace with hash 72258238, now seen corresponding path program 39 times [2021-06-12 15:26:18,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:18,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39838968] [2021-06-12 15:26:18,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:18,456 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:18,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:18,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39838968] [2021-06-12 15:26:18,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39838968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:18,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597910405] [2021-06-12 15:26:18,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:18,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 15:26:18,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:18,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 15:26:18,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:18,620 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:18,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597910405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:18,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:18,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-12 15:26:18,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955729243] [2021-06-12 15:26:18,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:26:18,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:18,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:26:18,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:26:18,621 INFO L87 Difference]: Start difference. First operand 2433 states and 6847 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) [2021-06-12 15:26:18,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:18,954 INFO L93 Difference]: Finished difference Result 3210 states and 8721 transitions. [2021-06-12 15:26:18,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:26:18,955 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 [2021-06-12 15:26:18,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:18,957 INFO L225 Difference]: With dead ends: 3210 [2021-06-12 15:26:18,957 INFO L226 Difference]: Without dead ends: 2721 [2021-06-12 15:26:18,958 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 315.7ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:26:18,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2021-06-12 15:26:18,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2378. [2021-06-12 15:26:18,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.8115271350441735) internal successors, (6683), 2377 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:18,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6683 transitions. [2021-06-12 15:26:18,980 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6683 transitions. Word has length 75 [2021-06-12 15:26:18,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:18,980 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6683 transitions. [2021-06-12 15:26:18,980 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) [2021-06-12 15:26:18,980 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6683 transitions. [2021-06-12 15:26:18,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:26:18,982 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:18,982 INFO L472 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] [2021-06-12 15:26:19,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:19,183 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:19,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:19,183 INFO L82 PathProgramCache]: Analyzing trace with hash -711333330, now seen corresponding path program 40 times [2021-06-12 15:26:19,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:19,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849423748] [2021-06-12 15:26:19,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:19,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:19,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849423748] [2021-06-12 15:26:19,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849423748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:19,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272898123] [2021-06-12 15:26:19,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:19,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:26:19,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:19,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:26:19,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:19,476 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:19,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272898123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:19,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:19,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-06-12 15:26:19,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72512195] [2021-06-12 15:26:19,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:26:19,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:19,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:26:19,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:26:19,477 INFO L87 Difference]: Start difference. First operand 2378 states and 6683 transitions. Second operand has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:19,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:19,715 INFO L93 Difference]: Finished difference Result 3268 states and 8783 transitions. [2021-06-12 15:26:19,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 15:26:19,715 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-12 15:26:19,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:19,718 INFO L225 Difference]: With dead ends: 3268 [2021-06-12 15:26:19,718 INFO L226 Difference]: Without dead ends: 2934 [2021-06-12 15:26:19,718 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 258.6ms TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:26:19,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-06-12 15:26:19,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 2463. [2021-06-12 15:26:19,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 2.7835093419983754) internal successors, (6853), 2462 states have internal predecessors, (6853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:19,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 6853 transitions. [2021-06-12 15:26:19,742 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 6853 transitions. Word has length 80 [2021-06-12 15:26:19,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:19,742 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 6853 transitions. [2021-06-12 15:26:19,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:19,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 6853 transitions. [2021-06-12 15:26:19,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:26:19,744 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:19,744 INFO L472 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] [2021-06-12 15:26:19,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-12 15:26:19,945 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:19,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:19,945 INFO L82 PathProgramCache]: Analyzing trace with hash -2057763374, now seen corresponding path program 41 times [2021-06-12 15:26:19,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:19,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320496872] [2021-06-12 15:26:19,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:19,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:20,040 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:20,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:20,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320496872] [2021-06-12 15:26:20,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320496872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:20,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868350692] [2021-06-12 15:26:20,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:20,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 15:26:20,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:20,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:26:20,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:20,209 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:20,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868350692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:20,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:20,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 15:26:20,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333475656] [2021-06-12 15:26:20,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:26:20,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:20,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:26:20,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:26:20,210 INFO L87 Difference]: Start difference. First operand 2463 states and 6853 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) [2021-06-12 15:26:20,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:20,402 INFO L93 Difference]: Finished difference Result 3561 states and 9177 transitions. [2021-06-12 15:26:20,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 15:26:20,402 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 [2021-06-12 15:26:20,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:20,406 INFO L225 Difference]: With dead ends: 3561 [2021-06-12 15:26:20,406 INFO L226 Difference]: Without dead ends: 3291 [2021-06-12 15:26:20,407 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 182.7ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:26:20,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3291 states. [2021-06-12 15:26:20,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3291 to 2478. [2021-06-12 15:26:20,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:20,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-12 15:26:20,439 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-12 15:26:20,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:20,439 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-12 15:26:20,439 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) [2021-06-12 15:26:20,439 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-12 15:26:20,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:26:20,444 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:20,445 INFO L472 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] [2021-06-12 15:26:20,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-12 15:26:20,658 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:20,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:20,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1337149122, now seen corresponding path program 42 times [2021-06-12 15:26:20,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:20,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342035795] [2021-06-12 15:26:20,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:20,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:20,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:20,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342035795] [2021-06-12 15:26:20,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342035795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:20,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614948118] [2021-06-12 15:26:20,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:20,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 15:26:20,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:20,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:26:20,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:20,998 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:20,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614948118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:20,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:20,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-12 15:26:20,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104237693] [2021-06-12 15:26:20,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:26:20,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:20,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:26:20,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:26:20,999 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:21,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:21,234 INFO L93 Difference]: Finished difference Result 3446 states and 8947 transitions. [2021-06-12 15:26:21,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 15:26:21,234 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-12 15:26:21,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:21,238 INFO L225 Difference]: With dead ends: 3446 [2021-06-12 15:26:21,238 INFO L226 Difference]: Without dead ends: 3176 [2021-06-12 15:26:21,238 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 241.9ms TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:26:21,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-12 15:26:21,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2478. [2021-06-12 15:26:21,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:21,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-12 15:26:21,262 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-12 15:26:21,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:21,263 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-12 15:26:21,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:21,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-12 15:26:21,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:26:21,265 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:21,265 INFO L472 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] [2021-06-12 15:26:21,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:21,465 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:21,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:21,466 INFO L82 PathProgramCache]: Analyzing trace with hash 908084816, now seen corresponding path program 43 times [2021-06-12 15:26:21,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:21,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554174994] [2021-06-12 15:26:21,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:21,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:21,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:21,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554174994] [2021-06-12 15:26:21,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554174994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:21,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737086496] [2021-06-12 15:26:21,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:21,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:26:21,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:21,717 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:21,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737086496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:21,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:21,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 15:26:21,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870088526] [2021-06-12 15:26:21,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:26:21,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:21,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:26:21,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:26:21,718 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 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) [2021-06-12 15:26:21,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:21,931 INFO L93 Difference]: Finished difference Result 3421 states and 8897 transitions. [2021-06-12 15:26:21,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 15:26:21,931 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 [2021-06-12 15:26:21,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:21,934 INFO L225 Difference]: With dead ends: 3421 [2021-06-12 15:26:21,934 INFO L226 Difference]: Without dead ends: 3151 [2021-06-12 15:26:21,934 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 211.2ms TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2021-06-12 15:26:21,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-12 15:26:21,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2478. [2021-06-12 15:26:21,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:21,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-12 15:26:21,958 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-12 15:26:21,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:21,958 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-12 15:26:21,958 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) [2021-06-12 15:26:21,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-12 15:26:21,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:26:21,960 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:21,960 INFO L472 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] [2021-06-12 15:26:22,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-12 15:26:22,161 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:22,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:22,161 INFO L82 PathProgramCache]: Analyzing trace with hash 221901632, now seen corresponding path program 44 times [2021-06-12 15:26:22,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:22,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130849549] [2021-06-12 15:26:22,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:22,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:22,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130849549] [2021-06-12 15:26:22,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130849549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:22,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048688396] [2021-06-12 15:26:22,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:22,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:26:22,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:22,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:26:22,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:22,510 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:22,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048688396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:22,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:22,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-12 15:26:22,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008509861] [2021-06-12 15:26:22,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:26:22,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:22,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:26:22,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:26:22,512 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:22,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:22,816 INFO L93 Difference]: Finished difference Result 3371 states and 8797 transitions. [2021-06-12 15:26:22,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:26:22,816 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-12 15:26:22,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:22,820 INFO L225 Difference]: With dead ends: 3371 [2021-06-12 15:26:22,820 INFO L226 Difference]: Without dead ends: 3101 [2021-06-12 15:26:22,820 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 340.9ms TimeCoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:26:22,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3101 states. [2021-06-12 15:26:22,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3101 to 2478. [2021-06-12 15:26:22,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:22,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-12 15:26:22,844 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-12 15:26:22,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:22,844 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-12 15:26:22,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:22,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-12 15:26:22,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:26:22,846 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:22,846 INFO L472 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] [2021-06-12 15:26:23,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:23,061 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:23,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:23,061 INFO L82 PathProgramCache]: Analyzing trace with hash 136866894, now seen corresponding path program 45 times [2021-06-12 15:26:23,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:23,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761516612] [2021-06-12 15:26:23,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:23,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:23,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761516612] [2021-06-12 15:26:23,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761516612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:23,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927785311] [2021-06-12 15:26:23,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:23,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 15:26:23,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:23,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:26:23,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:23,305 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:23,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927785311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:23,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:23,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 15:26:23,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236798496] [2021-06-12 15:26:23,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:26:23,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:23,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:26:23,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:26:23,307 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 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) [2021-06-12 15:26:23,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:23,521 INFO L93 Difference]: Finished difference Result 3321 states and 8697 transitions. [2021-06-12 15:26:23,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:26:23,522 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 [2021-06-12 15:26:23,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:23,524 INFO L225 Difference]: With dead ends: 3321 [2021-06-12 15:26:23,525 INFO L226 Difference]: Without dead ends: 3051 [2021-06-12 15:26:23,525 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 204.8ms TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:26:23,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-06-12 15:26:23,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 2478. [2021-06-12 15:26:23,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:23,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-12 15:26:23,551 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-12 15:26:23,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:23,551 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-12 15:26:23,552 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) [2021-06-12 15:26:23,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-12 15:26:23,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:26:23,553 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:23,553 INFO L472 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] [2021-06-12 15:26:23,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:23,761 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:23,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:23,762 INFO L82 PathProgramCache]: Analyzing trace with hash 68715838, now seen corresponding path program 46 times [2021-06-12 15:26:23,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:23,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520487202] [2021-06-12 15:26:23,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:23,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:23,866 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:23,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:23,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520487202] [2021-06-12 15:26:23,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520487202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:23,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693620759] [2021-06-12 15:26:23,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:23,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:26:23,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:23,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:26:23,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:24,046 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:24,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693620759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:24,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:24,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-12 15:26:24,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682153150] [2021-06-12 15:26:24,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:26:24,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:24,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:26:24,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:26:24,047 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:24,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:24,378 INFO L93 Difference]: Finished difference Result 3271 states and 8597 transitions. [2021-06-12 15:26:24,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:26:24,378 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-12 15:26:24,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:24,381 INFO L225 Difference]: With dead ends: 3271 [2021-06-12 15:26:24,381 INFO L226 Difference]: Without dead ends: 3001 [2021-06-12 15:26:24,381 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 324.9ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:26:24,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-06-12 15:26:24,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 2478. [2021-06-12 15:26:24,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:24,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-12 15:26:24,405 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-12 15:26:24,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:24,405 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-12 15:26:24,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:24,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-12 15:26:24,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:26:24,407 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:24,407 INFO L472 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] [2021-06-12 15:26:24,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-12 15:26:24,608 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:24,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:24,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1228253236, now seen corresponding path program 47 times [2021-06-12 15:26:24,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:24,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990933490] [2021-06-12 15:26:24,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:24,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:24,702 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:24,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:24,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990933490] [2021-06-12 15:26:24,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990933490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:24,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985516800] [2021-06-12 15:26:24,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:24,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 15:26:24,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:24,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:26:24,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:24,851 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:24,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985516800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:24,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:24,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 15:26:24,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566012568] [2021-06-12 15:26:24,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:26:24,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:24,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:26:24,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:26:24,852 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 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) [2021-06-12 15:26:25,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:25,139 INFO L93 Difference]: Finished difference Result 3221 states and 8497 transitions. [2021-06-12 15:26:25,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 15:26:25,139 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 [2021-06-12 15:26:25,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:25,142 INFO L225 Difference]: With dead ends: 3221 [2021-06-12 15:26:25,142 INFO L226 Difference]: Without dead ends: 2951 [2021-06-12 15:26:25,142 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 260.6ms TimeCoverageRelationStatistics Valid=305, Invalid=885, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 15:26:25,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-06-12 15:26:25,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2478. [2021-06-12 15:26:25,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:25,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-12 15:26:25,165 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-12 15:26:25,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:25,165 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-12 15:26:25,165 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) [2021-06-12 15:26:25,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-12 15:26:25,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:26:25,167 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:25,167 INFO L472 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] [2021-06-12 15:26:25,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:25,368 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:25,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:25,368 INFO L82 PathProgramCache]: Analyzing trace with hash -798499652, now seen corresponding path program 48 times [2021-06-12 15:26:25,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:25,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491358526] [2021-06-12 15:26:25,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:25,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:25,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:25,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491358526] [2021-06-12 15:26:25,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491358526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:25,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618851981] [2021-06-12 15:26:25,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:25,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 15:26:25,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:25,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:26:25,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:25,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618851981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:25,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:25,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-12 15:26:25,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048435692] [2021-06-12 15:26:25,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:26:25,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:25,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:26:25,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:26:25,637 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:26,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:26,084 INFO L93 Difference]: Finished difference Result 3679 states and 9763 transitions. [2021-06-12 15:26:26,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:26:26,084 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-12 15:26:26,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:26,087 INFO L225 Difference]: With dead ends: 3679 [2021-06-12 15:26:26,087 INFO L226 Difference]: Without dead ends: 3056 [2021-06-12 15:26:26,088 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 407.3ms TimeCoverageRelationStatistics Valid=401, Invalid=1239, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 15:26:26,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-06-12 15:26:26,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2388. [2021-06-12 15:26:26,113 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) [2021-06-12 15:26:26,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6648 transitions. [2021-06-12 15:26:26,115 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6648 transitions. Word has length 80 [2021-06-12 15:26:26,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:26,116 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6648 transitions. [2021-06-12 15:26:26,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:26,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6648 transitions. [2021-06-12 15:26:26,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:26:26,117 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:26,118 INFO L472 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] [2021-06-12 15:26:26,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-12 15:26:26,318 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:26,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:26,318 INFO L82 PathProgramCache]: Analyzing trace with hash -856233782, now seen corresponding path program 49 times [2021-06-12 15:26:26,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:26,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927661528] [2021-06-12 15:26:26,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:26,391 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:26,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:26,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927661528] [2021-06-12 15:26:26,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927661528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:26,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409189722] [2021-06-12 15:26:26,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:26,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:26:26,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:26,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409189722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:26,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:26,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-12 15:26:26,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938193747] [2021-06-12 15:26:26,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:26:26,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:26,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:26:26,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:26:26,535 INFO L87 Difference]: Start difference. First operand 2388 states and 6648 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) [2021-06-12 15:26:26,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:26,816 INFO L93 Difference]: Finished difference Result 3908 states and 10481 transitions. [2021-06-12 15:26:26,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:26:26,816 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 [2021-06-12 15:26:26,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:26,841 INFO L225 Difference]: With dead ends: 3908 [2021-06-12 15:26:26,842 INFO L226 Difference]: Without dead ends: 3638 [2021-06-12 15:26:26,842 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 238.0ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:26:26,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3638 states. [2021-06-12 15:26:26,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3638 to 2568. [2021-06-12 15:26:26,869 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) [2021-06-12 15:26:26,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 7207 transitions. [2021-06-12 15:26:26,872 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 7207 transitions. Word has length 80 [2021-06-12 15:26:26,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:26,872 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 7207 transitions. [2021-06-12 15:26:26,872 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) [2021-06-12 15:26:26,872 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 7207 transitions. [2021-06-12 15:26:26,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 15:26:26,874 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:26,874 INFO L472 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] [2021-06-12 15:26:27,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-12 15:26:27,080 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:27,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:27,081 INFO L82 PathProgramCache]: Analyzing trace with hash -833890532, now seen corresponding path program 50 times [2021-06-12 15:26:27,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:27,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854000111] [2021-06-12 15:26:27,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:27,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:27,165 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:27,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:27,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854000111] [2021-06-12 15:26:27,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854000111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:27,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622161975] [2021-06-12 15:26:27,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:27,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:26:27,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:27,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 15:26:27,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:27,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622161975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:27,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:27,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-12 15:26:27,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526562000] [2021-06-12 15:26:27,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:26:27,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:27,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:26:27,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:26:27,339 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) [2021-06-12 15:26:27,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:27,813 INFO L93 Difference]: Finished difference Result 3851 states and 10341 transitions. [2021-06-12 15:26:27,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:26:27,813 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 [2021-06-12 15:26:27,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:27,817 INFO L225 Difference]: With dead ends: 3851 [2021-06-12 15:26:27,817 INFO L226 Difference]: Without dead ends: 3276 [2021-06-12 15:26:27,817 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 422.4ms TimeCoverageRelationStatistics Valid=484, Invalid=1408, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 15:26:27,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-06-12 15:26:27,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2603. [2021-06-12 15:26:27,841 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) [2021-06-12 15:26:27,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-12 15:26:27,844 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 80 [2021-06-12 15:26:27,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:27,844 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-12 15:26:27,844 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) [2021-06-12 15:26:27,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-12 15:26:27,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:26:27,846 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:27,846 INFO L472 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] [2021-06-12 15:26:28,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-12 15:26:28,047 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:28,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:28,047 INFO L82 PathProgramCache]: Analyzing trace with hash 498592931, now seen corresponding path program 51 times [2021-06-12 15:26:28,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:28,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081415474] [2021-06-12 15:26:28,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:28,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:28,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081415474] [2021-06-12 15:26:28,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081415474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:28,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608498252] [2021-06-12 15:26:28,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:28,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 15:26:28,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:28,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:26:28,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:28,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608498252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:28,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:28,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-12 15:26:28,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492843360] [2021-06-12 15:26:28,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:26:28,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:28,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:26:28,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:26:28,333 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) [2021-06-12 15:26:28,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:28,572 INFO L93 Difference]: Finished difference Result 3446 states and 9097 transitions. [2021-06-12 15:26:28,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 15:26:28,572 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 [2021-06-12 15:26:28,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:28,575 INFO L225 Difference]: With dead ends: 3446 [2021-06-12 15:26:28,575 INFO L226 Difference]: Without dead ends: 3176 [2021-06-12 15:26:28,576 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 242.5ms TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 15:26:28,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-12 15:26:28,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2603. [2021-06-12 15:26:28,599 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) [2021-06-12 15:26:28,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-12 15:26:28,602 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-12 15:26:28,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:28,602 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-12 15:26:28,602 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) [2021-06-12 15:26:28,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-12 15:26:28,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:26:28,604 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:28,604 INFO L472 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] [2021-06-12 15:26:28,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-12 15:26:28,809 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:28,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:28,809 INFO L82 PathProgramCache]: Analyzing trace with hash -401461869, now seen corresponding path program 52 times [2021-06-12 15:26:28,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:28,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319641790] [2021-06-12 15:26:28,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:28,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:28,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:28,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319641790] [2021-06-12 15:26:28,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319641790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:28,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119786558] [2021-06-12 15:26:28,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:28,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:26:28,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:28,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:26:28,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:29,097 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:29,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119786558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:29,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:29,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-12 15:26:29,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928575907] [2021-06-12 15:26:29,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:26:29,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:29,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:26:29,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:26:29,098 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) [2021-06-12 15:26:29,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:29,386 INFO L93 Difference]: Finished difference Result 3641 states and 9487 transitions. [2021-06-12 15:26:29,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:26:29,386 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 [2021-06-12 15:26:29,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:29,389 INFO L225 Difference]: With dead ends: 3641 [2021-06-12 15:26:29,390 INFO L226 Difference]: Without dead ends: 3371 [2021-06-12 15:26:29,390 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 288.0ms TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:26:29,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3371 states. [2021-06-12 15:26:29,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3371 to 2603. [2021-06-12 15:26:29,421 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) [2021-06-12 15:26:29,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-12 15:26:29,425 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-12 15:26:29,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:29,425 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-12 15:26:29,425 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) [2021-06-12 15:26:29,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-12 15:26:29,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:26:29,427 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:29,427 INFO L472 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] [2021-06-12 15:26:29,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:29,637 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:29,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:29,637 INFO L82 PathProgramCache]: Analyzing trace with hash -830526175, now seen corresponding path program 53 times [2021-06-12 15:26:29,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:29,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207260293] [2021-06-12 15:26:29,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:29,734 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:29,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:29,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207260293] [2021-06-12 15:26:29,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207260293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:29,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141807002] [2021-06-12 15:26:29,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 15:26:29,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 15:26:29,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:29,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:26:29,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:29,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141807002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:29,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:29,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-12 15:26:29,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192290582] [2021-06-12 15:26:29,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:26:29,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:29,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:26:29,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:26:29,906 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) [2021-06-12 15:26:30,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:30,186 INFO L93 Difference]: Finished difference Result 3596 states and 9397 transitions. [2021-06-12 15:26:30,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 15:26:30,186 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 [2021-06-12 15:26:30,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:30,190 INFO L225 Difference]: With dead ends: 3596 [2021-06-12 15:26:30,190 INFO L226 Difference]: Without dead ends: 3326 [2021-06-12 15:26:30,190 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 250.2ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:26:30,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2021-06-12 15:26:30,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 2603. [2021-06-12 15:26:30,214 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) [2021-06-12 15:26:30,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-12 15:26:30,218 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-12 15:26:30,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:30,218 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-12 15:26:30,218 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) [2021-06-12 15:26:30,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-12 15:26:30,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:26:30,220 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:30,220 INFO L472 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] [2021-06-12 15:26:30,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:30,421 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:30,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:30,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1516709359, now seen corresponding path program 54 times [2021-06-12 15:26:30,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:30,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952290716] [2021-06-12 15:26:30,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:30,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:30,542 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:30,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:30,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952290716] [2021-06-12 15:26:30,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952290716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:30,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268962719] [2021-06-12 15:26:30,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:30,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 15:26:30,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:30,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:26:30,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:30,739 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:30,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268962719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:30,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:30,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-12 15:26:30,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360689873] [2021-06-12 15:26:30,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:26:30,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:30,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:26:30,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:26:30,740 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) [2021-06-12 15:26:31,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:31,062 INFO L93 Difference]: Finished difference Result 3546 states and 9297 transitions. [2021-06-12 15:26:31,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:26:31,063 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 [2021-06-12 15:26:31,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:31,066 INFO L225 Difference]: With dead ends: 3546 [2021-06-12 15:26:31,066 INFO L226 Difference]: Without dead ends: 3276 [2021-06-12 15:26:31,067 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 319.1ms TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:26:31,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-06-12 15:26:31,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2603. [2021-06-12 15:26:31,091 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) [2021-06-12 15:26:31,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-12 15:26:31,095 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-12 15:26:31,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:31,095 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-12 15:26:31,095 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) [2021-06-12 15:26:31,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-12 15:26:31,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:26:31,097 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:31,097 INFO L472 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] [2021-06-12 15:26:31,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:31,298 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:31,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:31,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1601744097, now seen corresponding path program 55 times [2021-06-12 15:26:31,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:31,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241443058] [2021-06-12 15:26:31,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:31,392 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:31,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:31,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241443058] [2021-06-12 15:26:31,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241443058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:31,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882439373] [2021-06-12 15:26:31,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:31,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:26:31,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:31,560 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:31,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882439373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:31,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:31,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-12 15:26:31,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037321005] [2021-06-12 15:26:31,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:26:31,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:31,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:26:31,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:26:31,562 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) [2021-06-12 15:26:31,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:31,846 INFO L93 Difference]: Finished difference Result 3496 states and 9197 transitions. [2021-06-12 15:26:31,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:26:31,847 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 [2021-06-12 15:26:31,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:31,850 INFO L225 Difference]: With dead ends: 3496 [2021-06-12 15:26:31,850 INFO L226 Difference]: Without dead ends: 3226 [2021-06-12 15:26:31,850 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 265.0ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:26:31,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-06-12 15:26:31,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2603. [2021-06-12 15:26:31,875 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) [2021-06-12 15:26:31,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-12 15:26:31,879 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-12 15:26:31,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:31,879 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-12 15:26:31,879 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) [2021-06-12 15:26:31,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-12 15:26:31,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:26:31,881 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:31,881 INFO L472 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] [2021-06-12 15:26:32,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-12 15:26:32,092 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:32,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:32,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1669895153, now seen corresponding path program 56 times [2021-06-12 15:26:32,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:32,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22778926] [2021-06-12 15:26:32,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:32,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:32,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:32,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22778926] [2021-06-12 15:26:32,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22778926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:32,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246570064] [2021-06-12 15:26:32,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:32,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:26:32,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:32,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:26:32,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:32,367 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:32,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246570064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:32,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:32,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-12 15:26:32,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128058754] [2021-06-12 15:26:32,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:26:32,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:32,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:26:32,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:26:32,368 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) [2021-06-12 15:26:32,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:32,715 INFO L93 Difference]: Finished difference Result 3446 states and 9097 transitions. [2021-06-12 15:26:32,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:26:32,716 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 [2021-06-12 15:26:32,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:32,719 INFO L225 Difference]: With dead ends: 3446 [2021-06-12 15:26:32,719 INFO L226 Difference]: Without dead ends: 3176 [2021-06-12 15:26:32,719 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 334.7ms TimeCoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 15:26:32,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-12 15:26:32,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2603. [2021-06-12 15:26:32,740 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) [2021-06-12 15:26:32,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-12 15:26:32,743 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-12 15:26:32,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:32,743 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-12 15:26:32,743 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) [2021-06-12 15:26:32,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-12 15:26:32,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:26:32,745 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:32,745 INFO L472 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] [2021-06-12 15:26:32,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:32,945 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:32,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:32,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1328103069, now seen corresponding path program 57 times [2021-06-12 15:26:32,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:32,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010342708] [2021-06-12 15:26:32,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:32,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:33,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:33,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010342708] [2021-06-12 15:26:33,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010342708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:33,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183314990] [2021-06-12 15:26:33,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:33,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 15:26:33,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:33,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:26:33,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:33,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183314990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:33,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:33,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-12 15:26:33,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180520908] [2021-06-12 15:26:33,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:26:33,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:33,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:26:33,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:26:33,237 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) [2021-06-12 15:26:33,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:33,565 INFO L93 Difference]: Finished difference Result 3396 states and 8997 transitions. [2021-06-12 15:26:33,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 15:26:33,566 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 [2021-06-12 15:26:33,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:33,569 INFO L225 Difference]: With dead ends: 3396 [2021-06-12 15:26:33,569 INFO L226 Difference]: Without dead ends: 3126 [2021-06-12 15:26:33,569 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 297.5ms TimeCoverageRelationStatistics Valid=413, Invalid=1147, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 15:26:33,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-06-12 15:26:33,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2603. [2021-06-12 15:26:33,592 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) [2021-06-12 15:26:33,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-12 15:26:33,595 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-12 15:26:33,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:33,595 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-12 15:26:33,595 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) [2021-06-12 15:26:33,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-12 15:26:33,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:26:33,597 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:33,597 INFO L472 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] [2021-06-12 15:26:33,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-12 15:26:33,798 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:33,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:33,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1757856653, now seen corresponding path program 58 times [2021-06-12 15:26:33,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:33,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120063201] [2021-06-12 15:26:33,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:33,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:33,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120063201] [2021-06-12 15:26:33,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120063201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:33,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156181866] [2021-06-12 15:26:33,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:34,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:26:34,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:34,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:26:34,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:34,134 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:34,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156181866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:34,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:34,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-12 15:26:34,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033224626] [2021-06-12 15:26:34,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:26:34,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:34,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:26:34,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:26:34,137 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) [2021-06-12 15:26:34,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:34,539 INFO L93 Difference]: Finished difference Result 3406 states and 9047 transitions. [2021-06-12 15:26:34,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:26:34,540 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 [2021-06-12 15:26:34,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:34,543 INFO L225 Difference]: With dead ends: 3406 [2021-06-12 15:26:34,543 INFO L226 Difference]: Without dead ends: 3136 [2021-06-12 15:26:34,543 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 418.9ms TimeCoverageRelationStatistics Valid=440, Invalid=1282, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 15:26:34,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2021-06-12 15:26:34,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 2603. [2021-06-12 15:26:34,578 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) [2021-06-12 15:26:34,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7288 transitions. [2021-06-12 15:26:34,582 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7288 transitions. Word has length 85 [2021-06-12 15:26:34,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:34,582 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7288 transitions. [2021-06-12 15:26:34,582 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) [2021-06-12 15:26:34,582 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7288 transitions. [2021-06-12 15:26:34,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:26:34,584 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:34,584 INFO L472 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] [2021-06-12 15:26:34,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:34,785 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:34,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:34,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1700122523, now seen corresponding path program 59 times [2021-06-12 15:26:34,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:34,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474953227] [2021-06-12 15:26:34,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:34,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:34,887 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:34,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:34,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474953227] [2021-06-12 15:26:34,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474953227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:34,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219015690] [2021-06-12 15:26:34,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 15:26:34,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 15:26:34,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:34,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:26:34,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:35,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219015690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:35,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:35,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-12 15:26:35,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569729626] [2021-06-12 15:26:35,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:26:35,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:35,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:26:35,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:26:35,057 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) [2021-06-12 15:26:35,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:35,414 INFO L93 Difference]: Finished difference Result 4148 states and 11171 transitions. [2021-06-12 15:26:35,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:26:35,414 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 [2021-06-12 15:26:35,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:35,418 INFO L225 Difference]: With dead ends: 4148 [2021-06-12 15:26:35,418 INFO L226 Difference]: Without dead ends: 3878 [2021-06-12 15:26:35,418 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 312.4ms TimeCoverageRelationStatistics Valid=489, Invalid=1233, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 15:26:35,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2021-06-12 15:26:35,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 2783. [2021-06-12 15:26:35,447 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) [2021-06-12 15:26:35,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 7847 transitions. [2021-06-12 15:26:35,451 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 7847 transitions. Word has length 85 [2021-06-12 15:26:35,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:35,451 INFO L482 AbstractCegarLoop]: Abstraction has 2783 states and 7847 transitions. [2021-06-12 15:26:35,451 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) [2021-06-12 15:26:35,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 7847 transitions. [2021-06-12 15:26:35,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 15:26:35,453 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:35,453 INFO L472 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] [2021-06-12 15:26:35,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-12 15:26:35,654 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:35,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:35,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1722465773, now seen corresponding path program 60 times [2021-06-12 15:26:35,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:35,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700079973] [2021-06-12 15:26:35,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:35,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:35,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700079973] [2021-06-12 15:26:35,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700079973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:35,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876979495] [2021-06-12 15:26:35,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:35,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 15:26:35,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:35,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 15:26:35,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:35,957 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:35,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876979495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:35,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:35,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-12 15:26:35,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328607242] [2021-06-12 15:26:35,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:26:35,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:35,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:26:35,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:26:35,958 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) [2021-06-12 15:26:36,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:36,437 INFO L93 Difference]: Finished difference Result 4016 states and 10836 transitions. [2021-06-12 15:26:36,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:26:36,437 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 [2021-06-12 15:26:36,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:36,441 INFO L225 Difference]: With dead ends: 4016 [2021-06-12 15:26:36,441 INFO L226 Difference]: Without dead ends: 3441 [2021-06-12 15:26:36,441 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 435.4ms TimeCoverageRelationStatistics Valid=554, Invalid=1608, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 15:26:36,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2021-06-12 15:26:36,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 1924. [2021-06-12 15:26:36,488 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) [2021-06-12 15:26:36,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5256 transitions. [2021-06-12 15:26:36,490 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5256 transitions. Word has length 85 [2021-06-12 15:26:36,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:36,490 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 5256 transitions. [2021-06-12 15:26:36,490 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) [2021-06-12 15:26:36,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5256 transitions. [2021-06-12 15:26:36,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:26:36,491 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:36,492 INFO L472 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] [2021-06-12 15:26:36,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:36,692 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:36,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:36,693 INFO L82 PathProgramCache]: Analyzing trace with hash -750339617, now seen corresponding path program 61 times [2021-06-12 15:26:36,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:36,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189046521] [2021-06-12 15:26:36,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:36,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:36,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:36,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189046521] [2021-06-12 15:26:36,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189046521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:36,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454990182] [2021-06-12 15:26:36,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:36,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:36,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:26:36,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:37,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454990182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:37,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:37,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-12 15:26:37,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756270026] [2021-06-12 15:26:37,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 15:26:37,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:37,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 15:26:37,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-12 15:26:37,032 INFO L87 Difference]: Start difference. First operand 1924 states and 5256 transitions. Second operand has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:37,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:37,308 INFO L93 Difference]: Finished difference Result 2864 states and 7456 transitions. [2021-06-12 15:26:37,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:26:37,308 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-12 15:26:37,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:37,311 INFO L225 Difference]: With dead ends: 2864 [2021-06-12 15:26:37,311 INFO L226 Difference]: Without dead ends: 2530 [2021-06-12 15:26:37,311 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 314.3ms TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:26:37,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-06-12 15:26:37,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2009. [2021-06-12 15:26:37,329 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) [2021-06-12 15:26:37,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 5426 transitions. [2021-06-12 15:26:37,331 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 5426 transitions. Word has length 90 [2021-06-12 15:26:37,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:37,332 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 5426 transitions. [2021-06-12 15:26:37,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:37,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 5426 transitions. [2021-06-12 15:26:37,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:26:37,333 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:37,333 INFO L472 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] [2021-06-12 15:26:37,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-12 15:26:37,549 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:37,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:37,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1583179645, now seen corresponding path program 62 times [2021-06-12 15:26:37,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:37,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629816624] [2021-06-12 15:26:37,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:37,665 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:37,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:37,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629816624] [2021-06-12 15:26:37,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629816624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:37,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292600886] [2021-06-12 15:26:37,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 15:26:37,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:26:37,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:37,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:26:37,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:37,838 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:37,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292600886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:37,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:37,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-12 15:26:37,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442530812] [2021-06-12 15:26:37,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:26:37,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:37,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:26:37,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:26:37,839 INFO L87 Difference]: Start difference. First operand 2009 states and 5426 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:38,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:38,055 INFO L93 Difference]: Finished difference Result 3386 states and 8437 transitions. [2021-06-12 15:26:38,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 15:26:38,056 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-12 15:26:38,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:38,059 INFO L225 Difference]: With dead ends: 3386 [2021-06-12 15:26:38,060 INFO L226 Difference]: Without dead ends: 3116 [2021-06-12 15:26:38,060 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 229.9ms TimeCoverageRelationStatistics Valid=260, Invalid=732, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:26:38,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2021-06-12 15:26:38,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 2153. [2021-06-12 15:26:38,080 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) [2021-06-12 15:26:38,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 5843 transitions. [2021-06-12 15:26:38,083 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 5843 transitions. Word has length 90 [2021-06-12 15:26:38,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:38,083 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 5843 transitions. [2021-06-12 15:26:38,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:38,083 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 5843 transitions. [2021-06-12 15:26:38,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:26:38,085 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:38,085 INFO L472 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] [2021-06-12 15:26:38,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-12 15:26:38,286 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:38,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:38,286 INFO L82 PathProgramCache]: Analyzing trace with hash -2037093005, now seen corresponding path program 63 times [2021-06-12 15:26:38,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:38,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694769045] [2021-06-12 15:26:38,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:38,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:38,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694769045] [2021-06-12 15:26:38,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694769045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:38,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873592253] [2021-06-12 15:26:38,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:38,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 15:26:38,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:38,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:26:38,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:38,602 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:38,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873592253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:38,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:38,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-12 15:26:38,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046147117] [2021-06-12 15:26:38,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:26:38,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:38,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:26:38,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:26:38,603 INFO L87 Difference]: Start difference. First operand 2153 states and 5843 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:38,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:38,887 INFO L93 Difference]: Finished difference Result 3346 states and 8432 transitions. [2021-06-12 15:26:38,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:26:38,888 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 [2021-06-12 15:26:38,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:38,891 INFO L225 Difference]: With dead ends: 3346 [2021-06-12 15:26:38,891 INFO L226 Difference]: Without dead ends: 3076 [2021-06-12 15:26:38,891 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 304.7ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:26:38,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2021-06-12 15:26:38,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 2228. [2021-06-12 15:26:38,914 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) [2021-06-12 15:26:38,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 6068 transitions. [2021-06-12 15:26:38,916 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 6068 transitions. Word has length 90 [2021-06-12 15:26:38,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:38,917 INFO L482 AbstractCegarLoop]: Abstraction has 2228 states and 6068 transitions. [2021-06-12 15:26:38,917 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) [2021-06-12 15:26:38,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 6068 transitions. [2021-06-12 15:26:38,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:26:38,918 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:38,918 INFO L472 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] [2021-06-12 15:26:39,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:39,119 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:39,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:39,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1159081087, now seen corresponding path program 64 times [2021-06-12 15:26:39,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:39,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833029506] [2021-06-12 15:26:39,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:39,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:39,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833029506] [2021-06-12 15:26:39,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833029506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:39,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312239058] [2021-06-12 15:26:39,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:39,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:26:39,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:39,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:26:39,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:39,372 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:39,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312239058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:39,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:39,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-12 15:26:39,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257790774] [2021-06-12 15:26:39,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:26:39,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:39,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:26:39,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:26:39,373 INFO L87 Difference]: Start difference. First operand 2228 states and 6068 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:39,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:39,636 INFO L93 Difference]: Finished difference Result 3396 states and 8607 transitions. [2021-06-12 15:26:39,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:26:39,636 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-12 15:26:39,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:39,639 INFO L225 Difference]: With dead ends: 3396 [2021-06-12 15:26:39,639 INFO L226 Difference]: Without dead ends: 3126 [2021-06-12 15:26:39,649 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 244.6ms TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 15:26:39,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-06-12 15:26:39,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2303. [2021-06-12 15:26:39,676 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) [2021-06-12 15:26:39,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 6293 transitions. [2021-06-12 15:26:39,678 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 6293 transitions. Word has length 90 [2021-06-12 15:26:39,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:39,678 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 6293 transitions. [2021-06-12 15:26:39,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:39,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 6293 transitions. [2021-06-12 15:26:39,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:26:39,680 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:39,680 INFO L472 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] [2021-06-12 15:26:39,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:39,896 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:39,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:39,896 INFO L82 PathProgramCache]: Analyzing trace with hash -2059135887, now seen corresponding path program 65 times [2021-06-12 15:26:39,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:39,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954051222] [2021-06-12 15:26:39,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:39,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:40,033 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:40,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:40,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954051222] [2021-06-12 15:26:40,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954051222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:40,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823109807] [2021-06-12 15:26:40,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:40,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 15:26:40,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:40,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:26:40,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:40,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823109807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:40,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:40,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-12 15:26:40,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421913069] [2021-06-12 15:26:40,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:26:40,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:40,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:26:40,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:26:40,220 INFO L87 Difference]: Start difference. First operand 2303 states and 6293 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:40,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:40,547 INFO L93 Difference]: Finished difference Result 3421 states and 8732 transitions. [2021-06-12 15:26:40,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:26:40,547 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 [2021-06-12 15:26:40,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:40,551 INFO L225 Difference]: With dead ends: 3421 [2021-06-12 15:26:40,551 INFO L226 Difference]: Without dead ends: 3151 [2021-06-12 15:26:40,551 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 312.8ms TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:26:40,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-12 15:26:40,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2378. [2021-06-12 15:26:40,575 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) [2021-06-12 15:26:40,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6518 transitions. [2021-06-12 15:26:40,577 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6518 transitions. Word has length 90 [2021-06-12 15:26:40,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:40,578 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6518 transitions. [2021-06-12 15:26:40,578 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) [2021-06-12 15:26:40,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6518 transitions. [2021-06-12 15:26:40,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:26:40,580 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:40,580 INFO L472 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] [2021-06-12 15:26:40,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-12 15:26:40,796 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:40,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:40,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1806767103, now seen corresponding path program 66 times [2021-06-12 15:26:40,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:40,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173984375] [2021-06-12 15:26:40,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:40,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:40,899 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:40,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:40,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173984375] [2021-06-12 15:26:40,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173984375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:40,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490654154] [2021-06-12 15:26:40,899 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:40,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 15:26:40,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:40,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:26:40,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:41,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490654154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:41,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:41,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-12 15:26:41,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529595109] [2021-06-12 15:26:41,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:26:41,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:41,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:26:41,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:26:41,073 INFO L87 Difference]: Start difference. First operand 2378 states and 6518 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:41,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:41,362 INFO L93 Difference]: Finished difference Result 3446 states and 8857 transitions. [2021-06-12 15:26:41,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 15:26:41,362 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-12 15:26:41,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:41,365 INFO L225 Difference]: With dead ends: 3446 [2021-06-12 15:26:41,365 INFO L226 Difference]: Without dead ends: 3176 [2021-06-12 15:26:41,366 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 268.4ms TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:26:41,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-12 15:26:41,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2453. [2021-06-12 15:26:41,392 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) [2021-06-12 15:26:41,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 6743 transitions. [2021-06-12 15:26:41,395 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 6743 transitions. Word has length 90 [2021-06-12 15:26:41,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:41,395 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 6743 transitions. [2021-06-12 15:26:41,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:41,395 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 6743 transitions. [2021-06-12 15:26:41,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:26:41,397 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:41,397 INFO L472 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] [2021-06-12 15:26:41,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:41,597 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:41,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:41,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1120583919, now seen corresponding path program 67 times [2021-06-12 15:26:41,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:41,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710221402] [2021-06-12 15:26:41,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:41,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:41,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:41,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710221402] [2021-06-12 15:26:41,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710221402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:41,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350048503] [2021-06-12 15:26:41,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:41,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:26:41,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:41,864 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:41,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350048503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:41,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:41,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-12 15:26:41,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518242558] [2021-06-12 15:26:41,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:26:41,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:41,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:26:41,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:26:41,865 INFO L87 Difference]: Start difference. First operand 2453 states and 6743 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:42,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:42,237 INFO L93 Difference]: Finished difference Result 3471 states and 8982 transitions. [2021-06-12 15:26:42,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:26:42,237 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 [2021-06-12 15:26:42,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:42,240 INFO L225 Difference]: With dead ends: 3471 [2021-06-12 15:26:42,240 INFO L226 Difference]: Without dead ends: 3201 [2021-06-12 15:26:42,240 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 348.8ms TimeCoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 15:26:42,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2021-06-12 15:26:42,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 2528. [2021-06-12 15:26:42,263 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) [2021-06-12 15:26:42,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 6968 transitions. [2021-06-12 15:26:42,266 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 6968 transitions. Word has length 90 [2021-06-12 15:26:42,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:42,266 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 6968 transitions. [2021-06-12 15:26:42,266 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) [2021-06-12 15:26:42,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 6968 transitions. [2021-06-12 15:26:42,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:26:42,268 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:42,268 INFO L472 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] [2021-06-12 15:26:42,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-12 15:26:42,469 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:42,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:42,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1035549181, now seen corresponding path program 68 times [2021-06-12 15:26:42,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:42,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391942360] [2021-06-12 15:26:42,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:42,576 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:42,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:42,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391942360] [2021-06-12 15:26:42,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391942360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:42,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646452695] [2021-06-12 15:26:42,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:42,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:26:42,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:42,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:26:42,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:42,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646452695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:42,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:42,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-12 15:26:42,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716861397] [2021-06-12 15:26:42,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:26:42,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:42,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:26:42,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:26:42,727 INFO L87 Difference]: Start difference. First operand 2528 states and 6968 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:43,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:43,014 INFO L93 Difference]: Finished difference Result 3496 states and 9107 transitions. [2021-06-12 15:26:43,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:26:43,015 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-12 15:26:43,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:43,018 INFO L225 Difference]: With dead ends: 3496 [2021-06-12 15:26:43,018 INFO L226 Difference]: Without dead ends: 3226 [2021-06-12 15:26:43,018 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 270.2ms TimeCoverageRelationStatistics Valid=347, Invalid=1059, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 15:26:43,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-06-12 15:26:43,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2603. [2021-06-12 15:26:43,041 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) [2021-06-12 15:26:43,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7193 transitions. [2021-06-12 15:26:43,044 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7193 transitions. Word has length 90 [2021-06-12 15:26:43,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:43,044 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7193 transitions. [2021-06-12 15:26:43,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:43,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7193 transitions. [2021-06-12 15:26:43,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:26:43,046 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:43,046 INFO L472 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] [2021-06-12 15:26:43,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:43,248 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:43,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:43,248 INFO L82 PathProgramCache]: Analyzing trace with hash 967398125, now seen corresponding path program 69 times [2021-06-12 15:26:43,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:43,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427743505] [2021-06-12 15:26:43,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:43,341 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:43,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:43,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427743505] [2021-06-12 15:26:43,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427743505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:43,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868903114] [2021-06-12 15:26:43,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:43,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 15:26:43,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:43,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:26:43,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:43,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868903114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:43,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:43,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-12 15:26:43,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46275660] [2021-06-12 15:26:43,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:26:43,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:43,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:26:43,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:26:43,523 INFO L87 Difference]: Start difference. First operand 2603 states and 7193 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:43,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:43,975 INFO L93 Difference]: Finished difference Result 3521 states and 9232 transitions. [2021-06-12 15:26:43,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:26:43,975 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 [2021-06-12 15:26:43,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:43,978 INFO L225 Difference]: With dead ends: 3521 [2021-06-12 15:26:43,978 INFO L226 Difference]: Without dead ends: 3251 [2021-06-12 15:26:43,978 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 374.4ms TimeCoverageRelationStatistics Valid=422, Invalid=1300, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 15:26:43,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3251 states. [2021-06-12 15:26:44,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3251 to 2678. [2021-06-12 15:26:44,002 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) [2021-06-12 15:26:44,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7418 transitions. [2021-06-12 15:26:44,005 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7418 transitions. Word has length 90 [2021-06-12 15:26:44,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:44,005 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7418 transitions. [2021-06-12 15:26:44,005 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) [2021-06-12 15:26:44,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7418 transitions. [2021-06-12 15:26:44,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:26:44,007 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:44,007 INFO L472 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] [2021-06-12 15:26:44,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-12 15:26:44,208 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:44,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:44,208 INFO L82 PathProgramCache]: Analyzing trace with hash -329570949, now seen corresponding path program 70 times [2021-06-12 15:26:44,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:44,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023002401] [2021-06-12 15:26:44,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:44,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:44,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023002401] [2021-06-12 15:26:44,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023002401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:44,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115511670] [2021-06-12 15:26:44,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:44,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:26:44,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:44,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:26:44,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:44,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115511670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:44,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:44,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-12 15:26:44,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14053050] [2021-06-12 15:26:44,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:26:44,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:44,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:26:44,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:26:44,461 INFO L87 Difference]: Start difference. First operand 2678 states and 7418 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:44,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:44,793 INFO L93 Difference]: Finished difference Result 3591 states and 9477 transitions. [2021-06-12 15:26:44,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 15:26:44,793 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-12 15:26:44,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:44,796 INFO L225 Difference]: With dead ends: 3591 [2021-06-12 15:26:44,796 INFO L226 Difference]: Without dead ends: 3321 [2021-06-12 15:26:44,797 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 295.0ms TimeCoverageRelationStatistics Valid=408, Invalid=1152, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 15:26:44,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-06-12 15:26:44,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2753. [2021-06-12 15:26:44,822 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) [2021-06-12 15:26:44,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7658 transitions. [2021-06-12 15:26:44,825 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7658 transitions. Word has length 90 [2021-06-12 15:26:44,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:44,825 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7658 transitions. [2021-06-12 15:26:44,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:44,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7658 transitions. [2021-06-12 15:26:44,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:26:44,827 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:44,827 INFO L472 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] [2021-06-12 15:26:45,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:45,027 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:45,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:45,028 INFO L82 PathProgramCache]: Analyzing trace with hash 100182635, now seen corresponding path program 71 times [2021-06-12 15:26:45,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:45,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226816229] [2021-06-12 15:26:45,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:45,115 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:45,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:45,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226816229] [2021-06-12 15:26:45,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226816229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:45,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564076255] [2021-06-12 15:26:45,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:45,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 15:26:45,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:45,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:26:45,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:45,282 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:45,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564076255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:45,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:45,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-12 15:26:45,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428192418] [2021-06-12 15:26:45,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:26:45,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:45,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:26:45,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:26:45,283 INFO L87 Difference]: Start difference. First operand 2753 states and 7658 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:45,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:45,756 INFO L93 Difference]: Finished difference Result 4169 states and 11103 transitions. [2021-06-12 15:26:45,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:26:45,756 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 [2021-06-12 15:26:45,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:45,759 INFO L225 Difference]: With dead ends: 4169 [2021-06-12 15:26:45,759 INFO L226 Difference]: Without dead ends: 3546 [2021-06-12 15:26:45,760 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 416.4ms TimeCoverageRelationStatistics Valid=512, Invalid=1558, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 15:26:45,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2021-06-12 15:26:45,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 2828. [2021-06-12 15:26:45,783 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) [2021-06-12 15:26:45,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7888 transitions. [2021-06-12 15:26:45,786 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7888 transitions. Word has length 90 [2021-06-12 15:26:45,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:45,787 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7888 transitions. [2021-06-12 15:26:45,787 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) [2021-06-12 15:26:45,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7888 transitions. [2021-06-12 15:26:45,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:26:45,788 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:45,789 INFO L472 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] [2021-06-12 15:26:45,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-12 15:26:45,989 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:45,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:45,989 INFO L82 PathProgramCache]: Analyzing trace with hash 42448505, now seen corresponding path program 72 times [2021-06-12 15:26:45,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:45,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37870113] [2021-06-12 15:26:45,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:45,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:46,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:46,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37870113] [2021-06-12 15:26:46,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37870113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:46,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025702940] [2021-06-12 15:26:46,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:46,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 15:26:46,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:46,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:26:46,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:46,241 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:46,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025702940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:46,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:46,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-12 15:26:46,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811745259] [2021-06-12 15:26:46,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 15:26:46,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:46,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 15:26:46,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-12 15:26:46,243 INFO L87 Difference]: Start difference. First operand 2828 states and 7888 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:46,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:46,600 INFO L93 Difference]: Finished difference Result 4398 states and 11821 transitions. [2021-06-12 15:26:46,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:26:46,600 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-12 15:26:46,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:46,604 INFO L225 Difference]: With dead ends: 4398 [2021-06-12 15:26:46,605 INFO L226 Difference]: Without dead ends: 4128 [2021-06-12 15:26:46,605 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 309.6ms TimeCoverageRelationStatistics Valid=486, Invalid=1236, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 15:26:46,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2021-06-12 15:26:46,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 3008. [2021-06-12 15:26:46,636 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) [2021-06-12 15:26:46,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 8447 transitions. [2021-06-12 15:26:46,639 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 8447 transitions. Word has length 90 [2021-06-12 15:26:46,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:46,639 INFO L482 AbstractCegarLoop]: Abstraction has 3008 states and 8447 transitions. [2021-06-12 15:26:46,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:46,640 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 8447 transitions. [2021-06-12 15:26:46,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 15:26:46,641 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:46,642 INFO L472 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] [2021-06-12 15:26:46,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:46,857 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:46,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:46,857 INFO L82 PathProgramCache]: Analyzing trace with hash 64791755, now seen corresponding path program 73 times [2021-06-12 15:26:46,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:46,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580980055] [2021-06-12 15:26:46,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:46,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:46,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:46,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580980055] [2021-06-12 15:26:46,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580980055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:46,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853673728] [2021-06-12 15:26:46,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:47,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 15:26:47,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:47,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853673728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:47,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:47,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-12 15:26:47,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799445229] [2021-06-12 15:26:47,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:26:47,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:47,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:26:47,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:26:47,121 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) [2021-06-12 15:26:47,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:47,613 INFO L93 Difference]: Finished difference Result 3885 states and 10521 transitions. [2021-06-12 15:26:47,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:26:47,613 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 [2021-06-12 15:26:47,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:47,616 INFO L225 Difference]: With dead ends: 3885 [2021-06-12 15:26:47,616 INFO L226 Difference]: Without dead ends: 3306 [2021-06-12 15:26:47,617 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 453.2ms TimeCoverageRelationStatistics Valid=579, Invalid=1491, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 15:26:47,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-06-12 15:26:47,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 2113. [2021-06-12 15:26:47,638 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) [2021-06-12 15:26:47,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 5778 transitions. [2021-06-12 15:26:47,640 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 5778 transitions. Word has length 90 [2021-06-12 15:26:47,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:47,640 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 5778 transitions. [2021-06-12 15:26:47,641 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) [2021-06-12 15:26:47,641 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 5778 transitions. [2021-06-12 15:26:47,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:26:47,642 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:47,642 INFO L472 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] [2021-06-12 15:26:47,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:47,843 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:47,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:47,843 INFO L82 PathProgramCache]: Analyzing trace with hash -472912364, now seen corresponding path program 74 times [2021-06-12 15:26:47,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:47,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287428676] [2021-06-12 15:26:47,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:47,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:47,964 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:47,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:47,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287428676] [2021-06-12 15:26:47,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287428676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:47,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478087241] [2021-06-12 15:26:47,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:48,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:26:48,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:48,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:26:48,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:48,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478087241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:48,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:48,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-12 15:26:48,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837661600] [2021-06-12 15:26:48,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:26:48,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:48,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:26:48,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:26:48,133 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) [2021-06-12 15:26:48,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:48,405 INFO L93 Difference]: Finished difference Result 3131 states and 8017 transitions. [2021-06-12 15:26:48,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:26:48,406 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 [2021-06-12 15:26:48,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:48,409 INFO L225 Difference]: With dead ends: 3131 [2021-06-12 15:26:48,409 INFO L226 Difference]: Without dead ends: 2861 [2021-06-12 15:26:48,409 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 282.0ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 15:26:48,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-06-12 15:26:48,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2188. [2021-06-12 15:26:48,432 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) [2021-06-12 15:26:48,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 6003 transitions. [2021-06-12 15:26:48,435 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 6003 transitions. Word has length 95 [2021-06-12 15:26:48,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:48,435 INFO L482 AbstractCegarLoop]: Abstraction has 2188 states and 6003 transitions. [2021-06-12 15:26:48,435 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) [2021-06-12 15:26:48,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 6003 transitions. [2021-06-12 15:26:48,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:26:48,437 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:48,437 INFO L472 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] [2021-06-12 15:26:48,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:48,645 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:48,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:48,645 INFO L82 PathProgramCache]: Analyzing trace with hash -926825724, now seen corresponding path program 75 times [2021-06-12 15:26:48,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:48,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022743846] [2021-06-12 15:26:48,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:48,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:48,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022743846] [2021-06-12 15:26:48,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022743846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:48,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491530483] [2021-06-12 15:26:48,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 15:26:48,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 15:26:48,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:48,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:26:48,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:48,956 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:48,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491530483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:48,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:48,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-12 15:26:48,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244162587] [2021-06-12 15:26:48,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:26:48,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:48,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:26:48,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:26:48,957 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) [2021-06-12 15:26:49,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:49,285 INFO L93 Difference]: Finished difference Result 3451 states and 8732 transitions. [2021-06-12 15:26:49,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:26:49,285 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 [2021-06-12 15:26:49,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:49,288 INFO L225 Difference]: With dead ends: 3451 [2021-06-12 15:26:49,288 INFO L226 Difference]: Without dead ends: 3181 [2021-06-12 15:26:49,288 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 332.8ms TimeCoverageRelationStatistics Valid=355, Invalid=1127, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:26:49,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-06-12 15:26:49,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 2263. [2021-06-12 15:26:49,311 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) [2021-06-12 15:26:49,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6228 transitions. [2021-06-12 15:26:49,313 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6228 transitions. Word has length 95 [2021-06-12 15:26:49,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:49,313 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6228 transitions. [2021-06-12 15:26:49,313 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) [2021-06-12 15:26:49,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6228 transitions. [2021-06-12 15:26:49,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:26:49,315 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:49,315 INFO L472 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] [2021-06-12 15:26:49,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:49,516 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:49,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:49,517 INFO L82 PathProgramCache]: Analyzing trace with hash -48813806, now seen corresponding path program 76 times [2021-06-12 15:26:49,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:49,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257739809] [2021-06-12 15:26:49,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:49,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:49,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:49,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257739809] [2021-06-12 15:26:49,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257739809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:49,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811295932] [2021-06-12 15:26:49,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:49,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:26:49,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:49,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:26:49,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:49,793 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:49,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811295932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:49,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:49,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-12 15:26:49,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511887556] [2021-06-12 15:26:49,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:26:49,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:49,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:26:49,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:26:49,794 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) [2021-06-12 15:26:50,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:50,081 INFO L93 Difference]: Finished difference Result 3481 states and 8867 transitions. [2021-06-12 15:26:50,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:26:50,081 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 [2021-06-12 15:26:50,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:50,084 INFO L225 Difference]: With dead ends: 3481 [2021-06-12 15:26:50,084 INFO L226 Difference]: Without dead ends: 3211 [2021-06-12 15:26:50,084 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 280.4ms TimeCoverageRelationStatistics Valid=361, Invalid=1121, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:26:50,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-06-12 15:26:50,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 2338. [2021-06-12 15:26:50,108 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) [2021-06-12 15:26:50,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6453 transitions. [2021-06-12 15:26:50,110 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6453 transitions. Word has length 95 [2021-06-12 15:26:50,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:50,110 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6453 transitions. [2021-06-12 15:26:50,110 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) [2021-06-12 15:26:50,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6453 transitions. [2021-06-12 15:26:50,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:26:50,112 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:50,112 INFO L472 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] [2021-06-12 15:26:50,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:50,317 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:50,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:50,317 INFO L82 PathProgramCache]: Analyzing trace with hash -948868606, now seen corresponding path program 77 times [2021-06-12 15:26:50,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:50,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473256248] [2021-06-12 15:26:50,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:50,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:50,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473256248] [2021-06-12 15:26:50,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473256248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:50,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755321455] [2021-06-12 15:26:50,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:50,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 15:26:50,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:50,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:26:50,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:50,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755321455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:50,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:50,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-12 15:26:50,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491723405] [2021-06-12 15:26:50,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:26:50,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:50,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:26:50,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:26:50,611 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) [2021-06-12 15:26:50,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:50,981 INFO L93 Difference]: Finished difference Result 3506 states and 8992 transitions. [2021-06-12 15:26:50,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:26:50,982 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 [2021-06-12 15:26:50,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:50,985 INFO L225 Difference]: With dead ends: 3506 [2021-06-12 15:26:50,985 INFO L226 Difference]: Without dead ends: 3236 [2021-06-12 15:26:50,985 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 347.1ms TimeCoverageRelationStatistics Valid=383, Invalid=1257, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 15:26:50,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-06-12 15:26:51,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 2413. [2021-06-12 15:26:51,009 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) [2021-06-12 15:26:51,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6678 transitions. [2021-06-12 15:26:51,012 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6678 transitions. Word has length 95 [2021-06-12 15:26:51,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:51,012 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6678 transitions. [2021-06-12 15:26:51,012 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) [2021-06-12 15:26:51,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6678 transitions. [2021-06-12 15:26:51,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:26:51,014 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:51,014 INFO L472 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] [2021-06-12 15:26:51,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:51,214 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:51,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:51,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1377932912, now seen corresponding path program 78 times [2021-06-12 15:26:51,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:51,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799482313] [2021-06-12 15:26:51,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:51,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:51,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799482313] [2021-06-12 15:26:51,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799482313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:51,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007072210] [2021-06-12 15:26:51,326 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 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 [2021-06-12 15:26:51,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 15:26:51,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:51,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:26:51,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:51,486 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:51,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007072210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:51,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:51,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-12 15:26:51,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658257184] [2021-06-12 15:26:51,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:26:51,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:51,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:26:51,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:26:51,487 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) [2021-06-12 15:26:51,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:51,813 INFO L93 Difference]: Finished difference Result 3531 states and 9117 transitions. [2021-06-12 15:26:51,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 15:26:51,813 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 [2021-06-12 15:26:51,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:51,816 INFO L225 Difference]: With dead ends: 3531 [2021-06-12 15:26:51,817 INFO L226 Difference]: Without dead ends: 3261 [2021-06-12 15:26:51,817 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 305.7ms TimeCoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 15:26:51,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3261 states. [2021-06-12 15:26:51,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3261 to 2488. [2021-06-12 15:26:51,842 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) [2021-06-12 15:26:51,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6903 transitions. [2021-06-12 15:26:51,845 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6903 transitions. Word has length 95 [2021-06-12 15:26:51,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:51,845 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6903 transitions. [2021-06-12 15:26:51,845 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) [2021-06-12 15:26:51,846 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6903 transitions. [2021-06-12 15:26:51,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:26:51,847 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:51,847 INFO L472 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] [2021-06-12 15:26:52,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:52,055 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:52,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:52,055 INFO L82 PathProgramCache]: Analyzing trace with hash -2064116096, now seen corresponding path program 79 times [2021-06-12 15:26:52,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:52,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063527648] [2021-06-12 15:26:52,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:52,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:52,171 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:52,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:52,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063527648] [2021-06-12 15:26:52,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063527648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:52,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6535781] [2021-06-12 15:26:52,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:52,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:26:52,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:52,344 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:52,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6535781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:52,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:52,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-12 15:26:52,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470511513] [2021-06-12 15:26:52,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:26:52,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:52,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:26:52,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:26:52,346 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) [2021-06-12 15:26:52,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:52,746 INFO L93 Difference]: Finished difference Result 3556 states and 9242 transitions. [2021-06-12 15:26:52,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:26:52,747 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 [2021-06-12 15:26:52,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:52,750 INFO L225 Difference]: With dead ends: 3556 [2021-06-12 15:26:52,750 INFO L226 Difference]: Without dead ends: 3286 [2021-06-12 15:26:52,750 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 386.5ms TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 15:26:52,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-06-12 15:26:52,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 2563. [2021-06-12 15:26:52,773 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) [2021-06-12 15:26:52,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7128 transitions. [2021-06-12 15:26:52,775 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7128 transitions. Word has length 95 [2021-06-12 15:26:52,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:52,776 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7128 transitions. [2021-06-12 15:26:52,776 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) [2021-06-12 15:26:52,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7128 transitions. [2021-06-12 15:26:52,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:26:52,777 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:52,777 INFO L472 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] [2021-06-12 15:26:52,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-12 15:26:52,978 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:52,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:52,978 INFO L82 PathProgramCache]: Analyzing trace with hash 2145816462, now seen corresponding path program 80 times [2021-06-12 15:26:52,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:52,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476001506] [2021-06-12 15:26:52,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:52,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:53,081 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:53,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:53,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476001506] [2021-06-12 15:26:53,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476001506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:53,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855001965] [2021-06-12 15:26:53,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:53,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:26:53,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:53,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:26:53,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:53,249 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:53,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855001965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:53,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:53,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-12 15:26:53,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641687567] [2021-06-12 15:26:53,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:26:53,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:53,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:26:53,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:26:53,250 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) [2021-06-12 15:26:53,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:53,589 INFO L93 Difference]: Finished difference Result 3581 states and 9367 transitions. [2021-06-12 15:26:53,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:26:53,589 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 [2021-06-12 15:26:53,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:53,592 INFO L225 Difference]: With dead ends: 3581 [2021-06-12 15:26:53,592 INFO L226 Difference]: Without dead ends: 3311 [2021-06-12 15:26:53,593 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 313.8ms TimeCoverageRelationStatistics Valid=461, Invalid=1345, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 15:26:53,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2021-06-12 15:26:53,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 2638. [2021-06-12 15:26:53,617 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) [2021-06-12 15:26:53,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7353 transitions. [2021-06-12 15:26:53,620 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7353 transitions. Word has length 95 [2021-06-12 15:26:53,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:53,620 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7353 transitions. [2021-06-12 15:26:53,620 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) [2021-06-12 15:26:53,620 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7353 transitions. [2021-06-12 15:26:53,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:26:53,622 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:53,622 INFO L472 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] [2021-06-12 15:26:53,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:53,822 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:53,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:53,823 INFO L82 PathProgramCache]: Analyzing trace with hash 2077665406, now seen corresponding path program 81 times [2021-06-12 15:26:53,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:53,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611955170] [2021-06-12 15:26:53,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:53,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:53,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:53,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611955170] [2021-06-12 15:26:53,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611955170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:53,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649768157] [2021-06-12 15:26:53,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 15:26:53,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 15:26:53,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:53,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:26:53,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:54,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649768157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:54,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:54,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-12 15:26:54,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433036328] [2021-06-12 15:26:54,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:26:54,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:54,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:26:54,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:26:54,111 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) [2021-06-12 15:26:54,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:54,555 INFO L93 Difference]: Finished difference Result 3606 states and 9492 transitions. [2021-06-12 15:26:54,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:26:54,556 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 [2021-06-12 15:26:54,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:54,558 INFO L225 Difference]: With dead ends: 3606 [2021-06-12 15:26:54,559 INFO L226 Difference]: Without dead ends: 3336 [2021-06-12 15:26:54,559 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 407.1ms TimeCoverageRelationStatistics Valid=487, Invalid=1493, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 15:26:54,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-06-12 15:26:54,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2713. [2021-06-12 15:26:54,583 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) [2021-06-12 15:26:54,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7578 transitions. [2021-06-12 15:26:54,586 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7578 transitions. Word has length 95 [2021-06-12 15:26:54,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:54,586 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7578 transitions. [2021-06-12 15:26:54,586 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) [2021-06-12 15:26:54,587 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7578 transitions. [2021-06-12 15:26:54,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:26:54,588 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:54,588 INFO L472 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] [2021-06-12 15:26:54,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-12 15:26:54,789 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:54,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:54,789 INFO L82 PathProgramCache]: Analyzing trace with hash 780696332, now seen corresponding path program 82 times [2021-06-12 15:26:54,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:54,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646590634] [2021-06-12 15:26:54,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:54,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:54,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646590634] [2021-06-12 15:26:54,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646590634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:54,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848622076] [2021-06-12 15:26:54,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:54,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:26:54,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:54,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:26:54,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:55,041 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:55,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848622076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:55,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:55,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-12 15:26:55,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639279004] [2021-06-12 15:26:55,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:26:55,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:55,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:26:55,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:26:55,043 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) [2021-06-12 15:26:55,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:55,409 INFO L93 Difference]: Finished difference Result 3631 states and 9617 transitions. [2021-06-12 15:26:55,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:26:55,409 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 [2021-06-12 15:26:55,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:55,412 INFO L225 Difference]: With dead ends: 3631 [2021-06-12 15:26:55,412 INFO L226 Difference]: Without dead ends: 3361 [2021-06-12 15:26:55,413 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 335.2ms TimeCoverageRelationStatistics Valid=535, Invalid=1445, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 15:26:55,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3361 states. [2021-06-12 15:26:55,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3361 to 2788. [2021-06-12 15:26:55,438 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) [2021-06-12 15:26:55,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7803 transitions. [2021-06-12 15:26:55,441 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7803 transitions. Word has length 95 [2021-06-12 15:26:55,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:55,442 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7803 transitions. [2021-06-12 15:26:55,442 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) [2021-06-12 15:26:55,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7803 transitions. [2021-06-12 15:26:55,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:26:55,444 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:55,444 INFO L472 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] [2021-06-12 15:26:55,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:55,644 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:55,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:55,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1210449916, now seen corresponding path program 83 times [2021-06-12 15:26:55,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:55,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666709025] [2021-06-12 15:26:55,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:55,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:55,749 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:55,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:55,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666709025] [2021-06-12 15:26:55,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666709025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:55,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538664945] [2021-06-12 15:26:55,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 15:26:55,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 15:26:55,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:55,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:26:55,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:55,917 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:55,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538664945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:55,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:55,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-12 15:26:55,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244783741] [2021-06-12 15:26:55,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:26:55,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:55,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:26:55,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:26:55,918 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) [2021-06-12 15:26:56,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:56,427 INFO L93 Difference]: Finished difference Result 3716 states and 9907 transitions. [2021-06-12 15:26:56,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:26:56,428 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 [2021-06-12 15:26:56,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:56,431 INFO L225 Difference]: With dead ends: 3716 [2021-06-12 15:26:56,431 INFO L226 Difference]: Without dead ends: 3446 [2021-06-12 15:26:56,432 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 459.6ms TimeCoverageRelationStatistics Valid=563, Invalid=1599, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 15:26:56,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-06-12 15:26:56,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2863. [2021-06-12 15:26:56,459 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) [2021-06-12 15:26:56,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 8048 transitions. [2021-06-12 15:26:56,463 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 8048 transitions. Word has length 95 [2021-06-12 15:26:56,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:56,463 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 8048 transitions. [2021-06-12 15:26:56,463 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) [2021-06-12 15:26:56,463 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 8048 transitions. [2021-06-12 15:26:56,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:26:56,465 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:56,465 INFO L472 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] [2021-06-12 15:26:56,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:56,681 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:56,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:56,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1152715786, now seen corresponding path program 84 times [2021-06-12 15:26:56,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:56,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787721600] [2021-06-12 15:26:56,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:56,794 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:56,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:56,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787721600] [2021-06-12 15:26:56,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787721600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:56,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763835644] [2021-06-12 15:26:56,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:56,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 15:26:56,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:56,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:26:56,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:56,951 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:56,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763835644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:56,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:56,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-12 15:26:56,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115659290] [2021-06-12 15:26:56,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 15:26:56,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:56,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 15:26:56,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-12 15:26:56,952 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) [2021-06-12 15:26:57,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:57,391 INFO L93 Difference]: Finished difference Result 4458 states and 12031 transitions. [2021-06-12 15:26:57,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:26:57,392 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 [2021-06-12 15:26:57,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:57,396 INFO L225 Difference]: With dead ends: 4458 [2021-06-12 15:26:57,396 INFO L226 Difference]: Without dead ends: 4188 [2021-06-12 15:26:57,396 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 400.7ms TimeCoverageRelationStatistics Valid=626, Invalid=1536, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 15:26:57,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2021-06-12 15:26:57,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 3043. [2021-06-12 15:26:57,424 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) [2021-06-12 15:26:57,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 8607 transitions. [2021-06-12 15:26:57,428 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 8607 transitions. Word has length 95 [2021-06-12 15:26:57,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:57,428 INFO L482 AbstractCegarLoop]: Abstraction has 3043 states and 8607 transitions. [2021-06-12 15:26:57,428 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) [2021-06-12 15:26:57,428 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 8607 transitions. [2021-06-12 15:26:57,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 15:26:57,430 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:57,430 INFO L472 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] [2021-06-12 15:26:57,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:57,630 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:57,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:57,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1175059036, now seen corresponding path program 85 times [2021-06-12 15:26:57,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:57,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283750430] [2021-06-12 15:26:57,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:57,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:57,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:57,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283750430] [2021-06-12 15:26:57,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283750430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:57,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224763760] [2021-06-12 15:26:57,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:57,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 15:26:57,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:57,906 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:57,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224763760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:57,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:57,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-12 15:26:57,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393820419] [2021-06-12 15:26:57,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:26:57,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:57,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:26:57,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:26:57,907 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) [2021-06-12 15:26:58,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:58,400 INFO L93 Difference]: Finished difference Result 3920 states and 10681 transitions. [2021-06-12 15:26:58,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:26:58,401 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 [2021-06-12 15:26:58,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:58,404 INFO L225 Difference]: With dead ends: 3920 [2021-06-12 15:26:58,404 INFO L226 Difference]: Without dead ends: 3431 [2021-06-12 15:26:58,404 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 454.8ms TimeCoverageRelationStatistics Valid=658, Invalid=1694, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 15:26:58,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2021-06-12 15:26:58,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 2034. [2021-06-12 15:26:58,425 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) [2021-06-12 15:26:58,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5566 transitions. [2021-06-12 15:26:58,428 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5566 transitions. Word has length 95 [2021-06-12 15:26:58,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:58,428 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 5566 transitions. [2021-06-12 15:26:58,428 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) [2021-06-12 15:26:58,428 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5566 transitions. [2021-06-12 15:26:58,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:26:58,429 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:58,430 INFO L472 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] [2021-06-12 15:26:58,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:58,630 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:58,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:58,630 INFO L82 PathProgramCache]: Analyzing trace with hash -2003017648, now seen corresponding path program 86 times [2021-06-12 15:26:58,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:58,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239608243] [2021-06-12 15:26:58,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:58,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:58,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239608243] [2021-06-12 15:26:58,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239608243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:58,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094427547] [2021-06-12 15:26:58,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:58,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:26:58,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:58,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:26:58,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:58,977 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:58,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094427547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:58,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:58,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 23 [2021-06-12 15:26:58,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821752452] [2021-06-12 15:26:58,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:26:58,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:58,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:26:58,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:26:58,978 INFO L87 Difference]: Start difference. First operand 2034 states and 5566 transitions. Second operand has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 23 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:59,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:26:59,300 INFO L93 Difference]: Finished difference Result 3024 states and 7866 transitions. [2021-06-12 15:26:59,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:26:59,300 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 23 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-12 15:26:59,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:26:59,303 INFO L225 Difference]: With dead ends: 3024 [2021-06-12 15:26:59,303 INFO L226 Difference]: Without dead ends: 2690 [2021-06-12 15:26:59,303 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 361.1ms TimeCoverageRelationStatistics Valid=474, Invalid=1332, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 15:26:59,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2021-06-12 15:26:59,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2119. [2021-06-12 15:26:59,322 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) [2021-06-12 15:26:59,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 5736 transitions. [2021-06-12 15:26:59,324 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 5736 transitions. Word has length 100 [2021-06-12 15:26:59,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:26:59,324 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 5736 transitions. [2021-06-12 15:26:59,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 23 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:26:59,325 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 5736 transitions. [2021-06-12 15:26:59,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:26:59,326 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:26:59,326 INFO L472 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] [2021-06-12 15:26:59,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:59,527 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:26:59,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:26:59,527 INFO L82 PathProgramCache]: Analyzing trace with hash 381501940, now seen corresponding path program 87 times [2021-06-12 15:26:59,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:26:59,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730484195] [2021-06-12 15:26:59,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:26:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:26:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:59,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:26:59,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730484195] [2021-06-12 15:26:59,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730484195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:59,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859856251] [2021-06-12 15:26:59,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:26:59,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 15:26:59,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:26:59,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:26:59,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:26:59,865 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:26:59,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859856251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:26:59,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:26:59,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-12 15:26:59,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11588436] [2021-06-12 15:26:59,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 15:26:59,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:26:59,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 15:26:59,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-06-12 15:26:59,867 INFO L87 Difference]: Start difference. First operand 2119 states and 5736 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) [2021-06-12 15:27:00,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:00,102 INFO L93 Difference]: Finished difference Result 3646 states and 9047 transitions. [2021-06-12 15:27:00,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 15:27:00,102 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 [2021-06-12 15:27:00,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:00,105 INFO L225 Difference]: With dead ends: 3646 [2021-06-12 15:27:00,105 INFO L226 Difference]: Without dead ends: 3376 [2021-06-12 15:27:00,105 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 278.4ms TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 15:27:00,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2021-06-12 15:27:00,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 2263. [2021-06-12 15:27:00,125 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) [2021-06-12 15:27:00,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6153 transitions. [2021-06-12 15:27:00,127 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6153 transitions. Word has length 100 [2021-06-12 15:27:00,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:00,128 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6153 transitions. [2021-06-12 15:27:00,128 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) [2021-06-12 15:27:00,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6153 transitions. [2021-06-12 15:27:00,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:27:00,129 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:00,129 INFO L472 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] [2021-06-12 15:27:00,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:00,337 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:00,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:00,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1021160164, now seen corresponding path program 88 times [2021-06-12 15:27:00,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:00,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596424135] [2021-06-12 15:27:00,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:00,473 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:00,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:00,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596424135] [2021-06-12 15:27:00,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596424135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:00,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096798159] [2021-06-12 15:27:00,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:00,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:00,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:00,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:27:00,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:00,705 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:00,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096798159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:00,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:00,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-12 15:27:00,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14157707] [2021-06-12 15:27:00,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:27:00,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:00,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:27:00,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:27:00,706 INFO L87 Difference]: Start difference. First operand 2263 states and 6153 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:01,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:01,008 INFO L93 Difference]: Finished difference Result 3606 states and 9042 transitions. [2021-06-12 15:27:01,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:27:01,008 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have 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 [2021-06-12 15:27:01,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:01,011 INFO L225 Difference]: With dead ends: 3606 [2021-06-12 15:27:01,011 INFO L226 Difference]: Without dead ends: 3336 [2021-06-12 15:27:01,011 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 348.0ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 15:27:01,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-06-12 15:27:01,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2338. [2021-06-12 15:27:01,033 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) [2021-06-12 15:27:01,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6378 transitions. [2021-06-12 15:27:01,036 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6378 transitions. Word has length 100 [2021-06-12 15:27:01,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:01,036 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6378 transitions. [2021-06-12 15:27:01,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:01,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6378 transitions. [2021-06-12 15:27:01,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:27:01,037 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:01,037 INFO L472 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] [2021-06-12 15:27:01,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-12 15:27:01,238 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:01,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:01,238 INFO L82 PathProgramCache]: Analyzing trace with hash 246241138, now seen corresponding path program 89 times [2021-06-12 15:27:01,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:01,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299893862] [2021-06-12 15:27:01,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:01,386 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:01,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:01,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299893862] [2021-06-12 15:27:01,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299893862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:01,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511791375] [2021-06-12 15:27:01,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:01,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 15:27:01,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:01,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:27:01,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:01,572 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:01,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511791375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:01,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:01,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-12 15:27:01,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405624162] [2021-06-12 15:27:01,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 15:27:01,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:01,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 15:27:01,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-12 15:27:01,573 INFO L87 Difference]: Start difference. First operand 2338 states and 6378 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) [2021-06-12 15:27:01,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:01,843 INFO L93 Difference]: Finished difference Result 3656 states and 9217 transitions. [2021-06-12 15:27:01,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 15:27:01,843 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 [2021-06-12 15:27:01,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:01,846 INFO L225 Difference]: With dead ends: 3656 [2021-06-12 15:27:01,846 INFO L226 Difference]: Without dead ends: 3386 [2021-06-12 15:27:01,846 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 294.8ms TimeCoverageRelationStatistics Valid=369, Invalid=1113, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 15:27:01,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-06-12 15:27:01,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 2413. [2021-06-12 15:27:01,869 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) [2021-06-12 15:27:01,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6603 transitions. [2021-06-12 15:27:01,872 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6603 transitions. Word has length 100 [2021-06-12 15:27:01,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:01,872 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6603 transitions. [2021-06-12 15:27:01,872 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) [2021-06-12 15:27:01,872 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6603 transitions. [2021-06-12 15:27:01,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:27:01,873 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:01,873 INFO L472 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] [2021-06-12 15:27:02,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:02,075 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:02,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:02,075 INFO L82 PathProgramCache]: Analyzing trace with hash -207672222, now seen corresponding path program 90 times [2021-06-12 15:27:02,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:02,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113291290] [2021-06-12 15:27:02,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:02,212 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:02,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:02,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113291290] [2021-06-12 15:27:02,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113291290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:02,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026023721] [2021-06-12 15:27:02,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:02,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 15:27:02,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:02,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:27:02,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:02,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026023721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:02,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:02,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-12 15:27:02,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504525615] [2021-06-12 15:27:02,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:27:02,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:02,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:27:02,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:27:02,399 INFO L87 Difference]: Start difference. First operand 2413 states and 6603 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:02,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:02,752 INFO L93 Difference]: Finished difference Result 3681 states and 9342 transitions. [2021-06-12 15:27:02,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:27:02,752 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have 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 [2021-06-12 15:27:02,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:02,756 INFO L225 Difference]: With dead ends: 3681 [2021-06-12 15:27:02,756 INFO L226 Difference]: Without dead ends: 3411 [2021-06-12 15:27:02,756 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 370.0ms TimeCoverageRelationStatistics Valid=434, Invalid=1372, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 15:27:02,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2021-06-12 15:27:02,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 2488. [2021-06-12 15:27:02,792 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) [2021-06-12 15:27:02,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6828 transitions. [2021-06-12 15:27:02,794 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6828 transitions. Word has length 100 [2021-06-12 15:27:02,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:02,795 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6828 transitions. [2021-06-12 15:27:02,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:02,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6828 transitions. [2021-06-12 15:27:02,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:27:02,796 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:02,796 INFO L472 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] [2021-06-12 15:27:02,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-12 15:27:02,997 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:02,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:02,997 INFO L82 PathProgramCache]: Analyzing trace with hash 670339696, now seen corresponding path program 91 times [2021-06-12 15:27:02,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:02,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314084765] [2021-06-12 15:27:02,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:03,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:03,119 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:03,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:03,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314084765] [2021-06-12 15:27:03,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314084765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:03,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455308002] [2021-06-12 15:27:03,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:03,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:03,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:27:03,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:03,318 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:03,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455308002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:03,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:03,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-12 15:27:03,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493208994] [2021-06-12 15:27:03,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 15:27:03,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:03,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 15:27:03,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-12 15:27:03,319 INFO L87 Difference]: Start difference. First operand 2488 states and 6828 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) [2021-06-12 15:27:03,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:03,623 INFO L93 Difference]: Finished difference Result 3706 states and 9467 transitions. [2021-06-12 15:27:03,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:27:03,623 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 [2021-06-12 15:27:03,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:03,627 INFO L225 Difference]: With dead ends: 3706 [2021-06-12 15:27:03,627 INFO L226 Difference]: Without dead ends: 3436 [2021-06-12 15:27:03,627 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 314.0ms TimeCoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 15:27:03,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2021-06-12 15:27:03,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 2563. [2021-06-12 15:27:03,650 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) [2021-06-12 15:27:03,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7053 transitions. [2021-06-12 15:27:03,653 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7053 transitions. Word has length 100 [2021-06-12 15:27:03,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:03,653 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7053 transitions. [2021-06-12 15:27:03,653 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) [2021-06-12 15:27:03,653 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7053 transitions. [2021-06-12 15:27:03,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:27:03,655 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:03,655 INFO L472 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] [2021-06-12 15:27:03,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:03,856 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:03,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:03,856 INFO L82 PathProgramCache]: Analyzing trace with hash -229715104, now seen corresponding path program 92 times [2021-06-12 15:27:03,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:03,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078868140] [2021-06-12 15:27:03,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:03,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:04,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:04,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078868140] [2021-06-12 15:27:04,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078868140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:04,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582424047] [2021-06-12 15:27:04,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:04,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:04,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:04,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:27:04,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:04,195 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:04,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582424047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:04,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:04,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-12 15:27:04,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726862073] [2021-06-12 15:27:04,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:27:04,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:04,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:27:04,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:27:04,196 INFO L87 Difference]: Start difference. First operand 2563 states and 7053 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:04,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:04,626 INFO L93 Difference]: Finished difference Result 3731 states and 9592 transitions. [2021-06-12 15:27:04,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:27:04,626 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have 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 [2021-06-12 15:27:04,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:04,629 INFO L225 Difference]: With dead ends: 3731 [2021-06-12 15:27:04,629 INFO L226 Difference]: Without dead ends: 3461 [2021-06-12 15:27:04,629 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 425.1ms TimeCoverageRelationStatistics Valid=468, Invalid=1512, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 15:27:04,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3461 states. [2021-06-12 15:27:04,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3461 to 2638. [2021-06-12 15:27:04,652 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) [2021-06-12 15:27:04,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7278 transitions. [2021-06-12 15:27:04,655 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7278 transitions. Word has length 100 [2021-06-12 15:27:04,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:04,655 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7278 transitions. [2021-06-12 15:27:04,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:04,655 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7278 transitions. [2021-06-12 15:27:04,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:27:04,656 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:04,657 INFO L472 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] [2021-06-12 15:27:04,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-12 15:27:04,865 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:04,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:04,865 INFO L82 PathProgramCache]: Analyzing trace with hash -658779410, now seen corresponding path program 93 times [2021-06-12 15:27:04,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:04,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407205967] [2021-06-12 15:27:04,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:04,986 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:04,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:04,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407205967] [2021-06-12 15:27:04,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407205967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:04,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511972815] [2021-06-12 15:27:04,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:05,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 15:27:05,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:05,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:27:05,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:05,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511972815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:05,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:05,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-12 15:27:05,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981263663] [2021-06-12 15:27:05,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 15:27:05,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:05,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 15:27:05,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 15:27:05,169 INFO L87 Difference]: Start difference. First operand 2638 states and 7278 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) [2021-06-12 15:27:05,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:05,537 INFO L93 Difference]: Finished difference Result 3756 states and 9717 transitions. [2021-06-12 15:27:05,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 15:27:05,537 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 [2021-06-12 15:27:05,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:05,541 INFO L225 Difference]: With dead ends: 3756 [2021-06-12 15:27:05,541 INFO L226 Difference]: Without dead ends: 3486 [2021-06-12 15:27:05,541 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 345.1ms TimeCoverageRelationStatistics Valid=437, Invalid=1369, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 15:27:05,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3486 states. [2021-06-12 15:27:05,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3486 to 2713. [2021-06-12 15:27:05,568 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) [2021-06-12 15:27:05,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7503 transitions. [2021-06-12 15:27:05,571 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7503 transitions. Word has length 100 [2021-06-12 15:27:05,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:05,571 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7503 transitions. [2021-06-12 15:27:05,571 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) [2021-06-12 15:27:05,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7503 transitions. [2021-06-12 15:27:05,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:27:05,573 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:05,573 INFO L472 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] [2021-06-12 15:27:05,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-12 15:27:05,774 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:05,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:05,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1344962594, now seen corresponding path program 94 times [2021-06-12 15:27:05,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:05,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537794669] [2021-06-12 15:27:05,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:05,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:05,901 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:05,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:05,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537794669] [2021-06-12 15:27:05,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537794669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:05,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078644424] [2021-06-12 15:27:05,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:05,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:05,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:05,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:27:05,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:06,103 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:06,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078644424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:06,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:06,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-12 15:27:06,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329828593] [2021-06-12 15:27:06,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:27:06,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:06,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:27:06,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:27:06,104 INFO L87 Difference]: Start difference. First operand 2713 states and 7503 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:06,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:06,585 INFO L93 Difference]: Finished difference Result 3781 states and 9842 transitions. [2021-06-12 15:27:06,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:27:06,586 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have 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 [2021-06-12 15:27:06,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:06,589 INFO L225 Difference]: With dead ends: 3781 [2021-06-12 15:27:06,589 INFO L226 Difference]: Without dead ends: 3511 [2021-06-12 15:27:06,589 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 458.0ms TimeCoverageRelationStatistics Valid=518, Invalid=1644, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 15:27:06,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2021-06-12 15:27:06,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2788. [2021-06-12 15:27:06,615 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) [2021-06-12 15:27:06,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7728 transitions. [2021-06-12 15:27:06,618 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7728 transitions. Word has length 100 [2021-06-12 15:27:06,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:06,618 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7728 transitions. [2021-06-12 15:27:06,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:06,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7728 transitions. [2021-06-12 15:27:06,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:27:06,620 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:06,620 INFO L472 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] [2021-06-12 15:27:06,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-12 15:27:06,820 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:06,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:06,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1429997332, now seen corresponding path program 95 times [2021-06-12 15:27:06,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:06,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525483020] [2021-06-12 15:27:06,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:06,939 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:06,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:06,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525483020] [2021-06-12 15:27:06,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525483020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:06,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043412171] [2021-06-12 15:27:06,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:06,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 15:27:06,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:06,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:27:06,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:07,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043412171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:07,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:07,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-12 15:27:07,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570542679] [2021-06-12 15:27:07,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 15:27:07,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:07,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 15:27:07,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-12 15:27:07,136 INFO L87 Difference]: Start difference. First operand 2788 states and 7728 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) [2021-06-12 15:27:07,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:07,530 INFO L93 Difference]: Finished difference Result 3806 states and 9967 transitions. [2021-06-12 15:27:07,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:27:07,530 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 [2021-06-12 15:27:07,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:07,534 INFO L225 Difference]: With dead ends: 3806 [2021-06-12 15:27:07,534 INFO L226 Difference]: Without dead ends: 3536 [2021-06-12 15:27:07,534 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 366.6ms TimeCoverageRelationStatistics Valid=495, Invalid=1485, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 15:27:07,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3536 states. [2021-06-12 15:27:07,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3536 to 2863. [2021-06-12 15:27:07,566 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) [2021-06-12 15:27:07,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7953 transitions. [2021-06-12 15:27:07,570 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7953 transitions. Word has length 100 [2021-06-12 15:27:07,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:07,570 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7953 transitions. [2021-06-12 15:27:07,570 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) [2021-06-12 15:27:07,570 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7953 transitions. [2021-06-12 15:27:07,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:27:07,572 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:07,572 INFO L472 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] [2021-06-12 15:27:07,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:07,773 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:07,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:07,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1498148388, now seen corresponding path program 96 times [2021-06-12 15:27:07,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:07,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120679546] [2021-06-12 15:27:07,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:07,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:07,893 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:07,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:07,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120679546] [2021-06-12 15:27:07,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120679546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:07,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209728485] [2021-06-12 15:27:07,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:07,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 15:27:07,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:07,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:27:07,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:08,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209728485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:08,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:08,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-12 15:27:08,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902783848] [2021-06-12 15:27:08,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:27:08,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:08,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:27:08,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:27:08,106 INFO L87 Difference]: Start difference. First operand 2863 states and 7953 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:08,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:08,622 INFO L93 Difference]: Finished difference Result 3831 states and 10092 transitions. [2021-06-12 15:27:08,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:27:08,623 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have 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 [2021-06-12 15:27:08,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:08,627 INFO L225 Difference]: With dead ends: 3831 [2021-06-12 15:27:08,627 INFO L226 Difference]: Without dead ends: 3561 [2021-06-12 15:27:08,627 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 492.5ms TimeCoverageRelationStatistics Valid=584, Invalid=1768, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 15:27:08,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-06-12 15:27:08,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2938. [2021-06-12 15:27:08,656 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) [2021-06-12 15:27:08,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8178 transitions. [2021-06-12 15:27:08,659 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8178 transitions. Word has length 100 [2021-06-12 15:27:08,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:08,659 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8178 transitions. [2021-06-12 15:27:08,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:08,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8178 transitions. [2021-06-12 15:27:08,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:27:08,661 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:08,662 INFO L472 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] [2021-06-12 15:27:08,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-12 15:27:08,862 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:08,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:08,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1499849834, now seen corresponding path program 97 times [2021-06-12 15:27:08,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:08,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444493538] [2021-06-12 15:27:08,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:08,979 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:08,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:08,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444493538] [2021-06-12 15:27:08,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444493538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:08,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661941087] [2021-06-12 15:27:08,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:09,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:27:09,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:09,167 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:09,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661941087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:09,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:09,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-12 15:27:09,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304094836] [2021-06-12 15:27:09,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 15:27:09,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:09,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 15:27:09,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-12 15:27:09,168 INFO L87 Difference]: Start difference. First operand 2938 states and 8178 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) [2021-06-12 15:27:09,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:09,584 INFO L93 Difference]: Finished difference Result 3856 states and 10217 transitions. [2021-06-12 15:27:09,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:27:09,584 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 [2021-06-12 15:27:09,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:09,588 INFO L225 Difference]: With dead ends: 3856 [2021-06-12 15:27:09,588 INFO L226 Difference]: Without dead ends: 3586 [2021-06-12 15:27:09,588 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 391.8ms TimeCoverageRelationStatistics Valid=569, Invalid=1593, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 15:27:09,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-06-12 15:27:09,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 3013. [2021-06-12 15:27:09,617 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) [2021-06-12 15:27:09,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8403 transitions. [2021-06-12 15:27:09,620 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8403 transitions. Word has length 100 [2021-06-12 15:27:09,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:09,620 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8403 transitions. [2021-06-12 15:27:09,620 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) [2021-06-12 15:27:09,620 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8403 transitions. [2021-06-12 15:27:09,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:27:09,622 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:09,623 INFO L472 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] [2021-06-12 15:27:09,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:09,826 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:09,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:09,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1929603418, now seen corresponding path program 98 times [2021-06-12 15:27:09,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:09,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571910993] [2021-06-12 15:27:09,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:09,960 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:09,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:09,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571910993] [2021-06-12 15:27:09,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571910993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:09,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855008327] [2021-06-12 15:27:09,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:10,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:10,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:10,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:27:10,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:10,146 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:10,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855008327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:10,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:10,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-12 15:27:10,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937513806] [2021-06-12 15:27:10,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:27:10,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:10,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:27:10,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:27:10,147 INFO L87 Difference]: Start difference. First operand 3013 states and 8403 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:10,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:10,699 INFO L93 Difference]: Finished difference Result 3941 states and 10507 transitions. [2021-06-12 15:27:10,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:27:10,699 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have 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 [2021-06-12 15:27:10,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:10,703 INFO L225 Difference]: With dead ends: 3941 [2021-06-12 15:27:10,703 INFO L226 Difference]: Without dead ends: 3671 [2021-06-12 15:27:10,704 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 522.3ms TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 15:27:10,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2021-06-12 15:27:10,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 3088. [2021-06-12 15:27:10,734 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) [2021-06-12 15:27:10,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8648 transitions. [2021-06-12 15:27:10,738 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8648 transitions. Word has length 100 [2021-06-12 15:27:10,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:10,738 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8648 transitions. [2021-06-12 15:27:10,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:10,738 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8648 transitions. [2021-06-12 15:27:10,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:27:10,740 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:10,740 INFO L472 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] [2021-06-12 15:27:10,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-12 15:27:10,941 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:10,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:10,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1871869288, now seen corresponding path program 99 times [2021-06-12 15:27:10,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:10,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107154278] [2021-06-12 15:27:10,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:11,060 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:11,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:11,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107154278] [2021-06-12 15:27:11,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107154278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:11,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774345140] [2021-06-12 15:27:11,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:11,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 15:27:11,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:11,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:27:11,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:11,245 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:11,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774345140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:11,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:11,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-12 15:27:11,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326979534] [2021-06-12 15:27:11,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 15:27:11,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:11,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 15:27:11,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-12 15:27:11,246 INFO L87 Difference]: Start difference. First operand 3088 states and 8648 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) [2021-06-12 15:27:11,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:11,697 INFO L93 Difference]: Finished difference Result 4708 states and 12681 transitions. [2021-06-12 15:27:11,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:27:11,697 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 [2021-06-12 15:27:11,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:11,701 INFO L225 Difference]: With dead ends: 4708 [2021-06-12 15:27:11,701 INFO L226 Difference]: Without dead ends: 4438 [2021-06-12 15:27:11,702 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 409.9ms TimeCoverageRelationStatistics Valid=660, Invalid=1692, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 15:27:11,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2021-06-12 15:27:11,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 3268. [2021-06-12 15:27:11,736 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) [2021-06-12 15:27:11,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3268 states to 3268 states and 9207 transitions. [2021-06-12 15:27:11,740 INFO L78 Accepts]: Start accepts. Automaton has 3268 states and 9207 transitions. Word has length 100 [2021-06-12 15:27:11,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:11,740 INFO L482 AbstractCegarLoop]: Abstraction has 3268 states and 9207 transitions. [2021-06-12 15:27:11,740 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) [2021-06-12 15:27:11,740 INFO L276 IsEmpty]: Start isEmpty. Operand 3268 states and 9207 transitions. [2021-06-12 15:27:11,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 15:27:11,742 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:11,742 INFO L472 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] [2021-06-12 15:27:11,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:11,943 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:11,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:11,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1894212538, now seen corresponding path program 100 times [2021-06-12 15:27:11,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:11,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143350444] [2021-06-12 15:27:11,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:12,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:12,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143350444] [2021-06-12 15:27:12,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143350444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:12,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492641886] [2021-06-12 15:27:12,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 15:27:12,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:12,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:12,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 15:27:12,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:12,226 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:12,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492641886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:12,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:12,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-12 15:27:12,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461865671] [2021-06-12 15:27:12,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 15:27:12,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:12,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 15:27:12,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-12 15:27:12,227 INFO L87 Difference]: Start difference. First operand 3268 states and 9207 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) [2021-06-12 15:27:12,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:12,802 INFO L93 Difference]: Finished difference Result 4195 states and 11381 transitions. [2021-06-12 15:27:12,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:27:12,802 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 [2021-06-12 15:27:12,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:12,806 INFO L225 Difference]: With dead ends: 4195 [2021-06-12 15:27:12,806 INFO L226 Difference]: Without dead ends: 3706 [2021-06-12 15:27:12,807 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 531.6ms TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 15:27:12,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3706 states. [2021-06-12 15:27:12,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3706 to 2313. [2021-06-12 15:27:12,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2312 states have (on average 2.737024221453287) internal successors, (6328), 2312 states have internal predecessors, (6328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:12,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 6328 transitions. [2021-06-12 15:27:12,831 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 6328 transitions. Word has length 100 [2021-06-12 15:27:12,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:12,831 INFO L482 AbstractCegarLoop]: Abstraction has 2313 states and 6328 transitions. [2021-06-12 15:27:12,831 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) [2021-06-12 15:27:12,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 6328 transitions. [2021-06-12 15:27:12,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:27:12,833 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:12,833 INFO L472 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] [2021-06-12 15:27:13,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:13,033 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:13,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:13,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1987209659, now seen corresponding path program 101 times [2021-06-12 15:27:13,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:13,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322345228] [2021-06-12 15:27:13,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:13,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:13,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322345228] [2021-06-12 15:27:13,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322345228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:13,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272481065] [2021-06-12 15:27:13,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:13,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 15:27:13,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:13,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:27:13,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:13,386 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:13,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272481065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:13,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:13,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-12 15:27:13,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508656638] [2021-06-12 15:27:13,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:27:13,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:13,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:27:13,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:27:13,387 INFO L87 Difference]: Start difference. First operand 2313 states and 6328 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) [2021-06-12 15:27:13,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:13,689 INFO L93 Difference]: Finished difference Result 3431 states and 8767 transitions. [2021-06-12 15:27:13,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:27:13,690 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 [2021-06-12 15:27:13,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:13,693 INFO L225 Difference]: With dead ends: 3431 [2021-06-12 15:27:13,693 INFO L226 Difference]: Without dead ends: 3161 [2021-06-12 15:27:13,693 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 330.9ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 15:27:13,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2021-06-12 15:27:13,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 2388. [2021-06-12 15:27:13,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 2.7452869710934227) internal successors, (6553), 2387 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) [2021-06-12 15:27:13,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6553 transitions. [2021-06-12 15:27:13,716 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6553 transitions. Word has length 105 [2021-06-12 15:27:13,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:13,716 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6553 transitions. [2021-06-12 15:27:13,716 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) [2021-06-12 15:27:13,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6553 transitions. [2021-06-12 15:27:13,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:27:13,718 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:13,718 INFO L472 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] [2021-06-12 15:27:13,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-12 15:27:13,918 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:13,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:13,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1347551435, now seen corresponding path program 102 times [2021-06-12 15:27:13,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:13,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491282526] [2021-06-12 15:27:13,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:14,122 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:14,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:14,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491282526] [2021-06-12 15:27:14,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491282526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:14,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909254040] [2021-06-12 15:27:14,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:14,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 15:27:14,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:14,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:27:14,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:14,339 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:14,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909254040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:14,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:14,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-12 15:27:14,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109238246] [2021-06-12 15:27:14,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:27:14,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:14,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:27:14,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:27:14,340 INFO L87 Difference]: Start difference. First operand 2388 states and 6553 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) [2021-06-12 15:27:14,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:14,690 INFO L93 Difference]: Finished difference Result 3801 states and 9582 transitions. [2021-06-12 15:27:14,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:27:14,690 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 [2021-06-12 15:27:14,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:14,694 INFO L225 Difference]: With dead ends: 3801 [2021-06-12 15:27:14,694 INFO L226 Difference]: Without dead ends: 3531 [2021-06-12 15:27:14,694 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 409.6ms TimeCoverageRelationStatistics Valid=465, Invalid=1427, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 15:27:14,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3531 states. [2021-06-12 15:27:14,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3531 to 2463. [2021-06-12 15:27:14,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 2.753046303818034) internal successors, (6778), 2462 states have internal predecessors, (6778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:14,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 6778 transitions. [2021-06-12 15:27:14,722 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 6778 transitions. Word has length 105 [2021-06-12 15:27:14,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:14,722 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 6778 transitions. [2021-06-12 15:27:14,722 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) [2021-06-12 15:27:14,722 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 6778 transitions. [2021-06-12 15:27:14,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:27:14,724 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:14,724 INFO L472 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] [2021-06-12 15:27:14,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:14,924 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:14,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:14,925 INFO L82 PathProgramCache]: Analyzing trace with hash -2122470461, now seen corresponding path program 103 times [2021-06-12 15:27:14,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:14,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029723961] [2021-06-12 15:27:14,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:15,075 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:15,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:15,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029723961] [2021-06-12 15:27:15,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029723961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:15,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321084880] [2021-06-12 15:27:15,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:15,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:27:15,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:15,256 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:15,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321084880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:15,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:15,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-12 15:27:15,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044056628] [2021-06-12 15:27:15,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:27:15,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:15,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:27:15,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:27:15,257 INFO L87 Difference]: Start difference. First operand 2463 states and 6778 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) [2021-06-12 15:27:15,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:15,572 INFO L93 Difference]: Finished difference Result 3831 states and 9717 transitions. [2021-06-12 15:27:15,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 15:27:15,572 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 [2021-06-12 15:27:15,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:15,576 INFO L225 Difference]: With dead ends: 3831 [2021-06-12 15:27:15,576 INFO L226 Difference]: Without dead ends: 3561 [2021-06-12 15:27:15,576 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 356.9ms TimeCoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 15:27:15,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-06-12 15:27:15,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2538. [2021-06-12 15:27:15,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2538 states, 2537 states have (on average 2.760346866377611) internal successors, (7003), 2537 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) [2021-06-12 15:27:15,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2538 states to 2538 states and 7003 transitions. [2021-06-12 15:27:15,602 INFO L78 Accepts]: Start accepts. Automaton has 2538 states and 7003 transitions. Word has length 105 [2021-06-12 15:27:15,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:15,602 INFO L482 AbstractCegarLoop]: Abstraction has 2538 states and 7003 transitions. [2021-06-12 15:27:15,602 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) [2021-06-12 15:27:15,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2538 states and 7003 transitions. [2021-06-12 15:27:15,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:27:15,604 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:15,604 INFO L472 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] [2021-06-12 15:27:15,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:15,804 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:15,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:15,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1718583475, now seen corresponding path program 104 times [2021-06-12 15:27:15,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:15,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334648785] [2021-06-12 15:27:15,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:15,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:15,949 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:15,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:15,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334648785] [2021-06-12 15:27:15,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334648785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:15,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574760634] [2021-06-12 15:27:15,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:16,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:16,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:16,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:27:16,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:16,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574760634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:16,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:16,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-12 15:27:16,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781162897] [2021-06-12 15:27:16,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:27:16,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:16,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:27:16,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:27:16,145 INFO L87 Difference]: Start difference. First operand 2538 states and 7003 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) [2021-06-12 15:27:16,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:16,544 INFO L93 Difference]: Finished difference Result 3856 states and 9842 transitions. [2021-06-12 15:27:16,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:27:16,544 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 [2021-06-12 15:27:16,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:16,547 INFO L225 Difference]: With dead ends: 3856 [2021-06-12 15:27:16,547 INFO L226 Difference]: Without dead ends: 3586 [2021-06-12 15:27:16,548 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 415.8ms TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 15:27:16,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-06-12 15:27:16,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 2613. [2021-06-12 15:27:16,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2613 states, 2612 states have (on average 2.767228177641654) internal successors, (7228), 2612 states have internal predecessors, (7228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:16,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2613 states to 2613 states and 7228 transitions. [2021-06-12 15:27:16,585 INFO L78 Accepts]: Start accepts. Automaton has 2613 states and 7228 transitions. Word has length 105 [2021-06-12 15:27:16,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:16,585 INFO L482 AbstractCegarLoop]: Abstraction has 2613 states and 7228 transitions. [2021-06-12 15:27:16,585 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) [2021-06-12 15:27:16,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2613 states and 7228 transitions. [2021-06-12 15:27:16,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:27:16,587 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:16,587 INFO L472 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] [2021-06-12 15:27:16,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-12 15:27:16,787 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:16,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:16,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1698371903, now seen corresponding path program 105 times [2021-06-12 15:27:16,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:16,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564437656] [2021-06-12 15:27:16,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:16,927 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:16,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:16,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564437656] [2021-06-12 15:27:16,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564437656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:16,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088311831] [2021-06-12 15:27:16,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:16,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 15:27:16,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:16,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:27:16,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:17,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088311831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:17,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:17,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-12 15:27:17,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788805583] [2021-06-12 15:27:17,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:27:17,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:17,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:27:17,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:27:17,120 INFO L87 Difference]: Start difference. First operand 2613 states and 7228 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) [2021-06-12 15:27:17,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:17,478 INFO L93 Difference]: Finished difference Result 3881 states and 9967 transitions. [2021-06-12 15:27:17,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:27:17,479 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 [2021-06-12 15:27:17,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:17,482 INFO L225 Difference]: With dead ends: 3881 [2021-06-12 15:27:17,482 INFO L226 Difference]: Without dead ends: 3611 [2021-06-12 15:27:17,483 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 367.6ms TimeCoverageRelationStatistics Valid=506, Invalid=1564, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 15:27:17,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3611 states. [2021-06-12 15:27:17,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3611 to 2688. [2021-06-12 15:27:17,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2688 states, 2687 states have (on average 2.773725344250093) internal successors, (7453), 2687 states have internal predecessors, (7453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:17,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 7453 transitions. [2021-06-12 15:27:17,513 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 7453 transitions. Word has length 105 [2021-06-12 15:27:17,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:17,513 INFO L482 AbstractCegarLoop]: Abstraction has 2688 states and 7453 transitions. [2021-06-12 15:27:17,513 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) [2021-06-12 15:27:17,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 7453 transitions. [2021-06-12 15:27:17,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:27:17,515 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:17,515 INFO L472 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] [2021-06-12 15:27:17,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-12 15:27:17,716 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:17,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:17,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1696540593, now seen corresponding path program 106 times [2021-06-12 15:27:17,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:17,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009883203] [2021-06-12 15:27:17,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:17,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:17,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009883203] [2021-06-12 15:27:17,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009883203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:17,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081694932] [2021-06-12 15:27:17,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:17,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:17,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:17,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:27:17,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:18,055 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:18,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081694932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:18,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:18,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-12 15:27:18,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623646316] [2021-06-12 15:27:18,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:27:18,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:18,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:27:18,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:27:18,056 INFO L87 Difference]: Start difference. First operand 2688 states and 7453 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) [2021-06-12 15:27:18,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:18,502 INFO L93 Difference]: Finished difference Result 3906 states and 10092 transitions. [2021-06-12 15:27:18,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:27:18,503 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 [2021-06-12 15:27:18,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:18,506 INFO L225 Difference]: With dead ends: 3906 [2021-06-12 15:27:18,507 INFO L226 Difference]: Without dead ends: 3636 [2021-06-12 15:27:18,507 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 455.2ms TimeCoverageRelationStatistics Valid=531, Invalid=1725, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 15:27:18,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3636 states. [2021-06-12 15:27:18,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3636 to 2763. [2021-06-12 15:27:18,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2763 states, 2762 states have (on average 2.779869659666908) internal successors, (7678), 2762 states have internal predecessors, (7678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:18,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2763 states to 2763 states and 7678 transitions. [2021-06-12 15:27:18,538 INFO L78 Accepts]: Start accepts. Automaton has 2763 states and 7678 transitions. Word has length 105 [2021-06-12 15:27:18,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:18,538 INFO L482 AbstractCegarLoop]: Abstraction has 2763 states and 7678 transitions. [2021-06-12 15:27:18,538 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) [2021-06-12 15:27:18,538 INFO L276 IsEmpty]: Start isEmpty. Operand 2763 states and 7678 transitions. [2021-06-12 15:27:18,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:27:18,540 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:18,540 INFO L472 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] [2021-06-12 15:27:18,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-12 15:27:18,741 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:18,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:18,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1267476287, now seen corresponding path program 107 times [2021-06-12 15:27:18,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:18,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90323586] [2021-06-12 15:27:18,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:18,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:18,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90323586] [2021-06-12 15:27:18,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90323586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:18,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827798446] [2021-06-12 15:27:18,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:18,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 15:27:18,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:18,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:27:18,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:19,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827798446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:19,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:19,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-12 15:27:19,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416711158] [2021-06-12 15:27:19,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:27:19,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:19,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:27:19,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:27:19,061 INFO L87 Difference]: Start difference. First operand 2763 states and 7678 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) [2021-06-12 15:27:19,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:19,459 INFO L93 Difference]: Finished difference Result 3931 states and 10217 transitions. [2021-06-12 15:27:19,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:27:19,460 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 [2021-06-12 15:27:19,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:19,464 INFO L225 Difference]: With dead ends: 3931 [2021-06-12 15:27:19,464 INFO L226 Difference]: Without dead ends: 3661 [2021-06-12 15:27:19,464 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 389.6ms TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 15:27:19,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2021-06-12 15:27:19,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 2838. [2021-06-12 15:27:19,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2838 states, 2837 states have (on average 2.785689108212901) internal successors, (7903), 2837 states have internal predecessors, (7903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:19,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2838 states to 2838 states and 7903 transitions. [2021-06-12 15:27:19,500 INFO L78 Accepts]: Start accepts. Automaton has 2838 states and 7903 transitions. Word has length 105 [2021-06-12 15:27:19,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:19,500 INFO L482 AbstractCegarLoop]: Abstraction has 2838 states and 7903 transitions. [2021-06-12 15:27:19,500 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) [2021-06-12 15:27:19,500 INFO L276 IsEmpty]: Start isEmpty. Operand 2838 states and 7903 transitions. [2021-06-12 15:27:19,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:27:19,502 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:19,503 INFO L472 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] [2021-06-12 15:27:19,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:19,705 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:19,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:19,705 INFO L82 PathProgramCache]: Analyzing trace with hash 581293103, now seen corresponding path program 108 times [2021-06-12 15:27:19,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:19,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079761319] [2021-06-12 15:27:19,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:19,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:19,840 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:19,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:19,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079761319] [2021-06-12 15:27:19,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079761319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:19,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321057507] [2021-06-12 15:27:19,840 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 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 [2021-06-12 15:27:19,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 15:27:19,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:19,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:27:19,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:20,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321057507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:20,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:20,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-12 15:27:20,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773464759] [2021-06-12 15:27:20,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:27:20,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:20,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:27:20,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:27:20,070 INFO L87 Difference]: Start difference. First operand 2838 states and 7903 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) [2021-06-12 15:27:20,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:20,557 INFO L93 Difference]: Finished difference Result 3956 states and 10342 transitions. [2021-06-12 15:27:20,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:27:20,557 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 [2021-06-12 15:27:20,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:20,561 INFO L225 Difference]: With dead ends: 3956 [2021-06-12 15:27:20,561 INFO L226 Difference]: Without dead ends: 3686 [2021-06-12 15:27:20,561 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 483.3ms TimeCoverageRelationStatistics Valid=588, Invalid=1862, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 15:27:20,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3686 states. [2021-06-12 15:27:20,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3686 to 2913. [2021-06-12 15:27:20,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2912 states have (on average 2.791208791208791) internal successors, (8128), 2912 states have internal predecessors, (8128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:20,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 8128 transitions. [2021-06-12 15:27:20,593 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 8128 transitions. Word has length 105 [2021-06-12 15:27:20,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:20,593 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 8128 transitions. [2021-06-12 15:27:20,593 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) [2021-06-12 15:27:20,593 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 8128 transitions. [2021-06-12 15:27:20,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:27:20,595 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:20,595 INFO L472 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] [2021-06-12 15:27:20,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-12 15:27:20,796 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:20,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:20,796 INFO L82 PathProgramCache]: Analyzing trace with hash 496258365, now seen corresponding path program 109 times [2021-06-12 15:27:20,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:20,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744952099] [2021-06-12 15:27:20,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:20,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:20,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744952099] [2021-06-12 15:27:20,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744952099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:20,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339327796] [2021-06-12 15:27:20,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:20,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:20,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:27:20,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:21,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339327796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:21,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:21,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-12 15:27:21,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189283038] [2021-06-12 15:27:21,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:27:21,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:21,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:27:21,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:27:21,092 INFO L87 Difference]: Start difference. First operand 2913 states and 8128 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) [2021-06-12 15:27:21,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:21,519 INFO L93 Difference]: Finished difference Result 3981 states and 10467 transitions. [2021-06-12 15:27:21,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:27:21,520 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 [2021-06-12 15:27:21,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:21,523 INFO L225 Difference]: With dead ends: 3981 [2021-06-12 15:27:21,523 INFO L226 Difference]: Without dead ends: 3711 [2021-06-12 15:27:21,524 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 397.1ms TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 15:27:21,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3711 states. [2021-06-12 15:27:21,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3711 to 2988. [2021-06-12 15:27:21,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2988 states, 2987 states have (on average 2.7964512889186475) internal successors, (8353), 2987 states have internal predecessors, (8353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:21,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2988 states to 2988 states and 8353 transitions. [2021-06-12 15:27:21,570 INFO L78 Accepts]: Start accepts. Automaton has 2988 states and 8353 transitions. Word has length 105 [2021-06-12 15:27:21,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:21,570 INFO L482 AbstractCegarLoop]: Abstraction has 2988 states and 8353 transitions. [2021-06-12 15:27:21,570 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) [2021-06-12 15:27:21,570 INFO L276 IsEmpty]: Start isEmpty. Operand 2988 states and 8353 transitions. [2021-06-12 15:27:21,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:27:21,572 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:21,572 INFO L472 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] [2021-06-12 15:27:21,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-12 15:27:21,773 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:21,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:21,773 INFO L82 PathProgramCache]: Analyzing trace with hash 428107309, now seen corresponding path program 110 times [2021-06-12 15:27:21,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:21,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156349407] [2021-06-12 15:27:21,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:21,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:21,907 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:21,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:21,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156349407] [2021-06-12 15:27:21,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156349407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:21,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541165736] [2021-06-12 15:27:21,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:21,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:21,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:21,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:27:21,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:22,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541165736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:22,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:22,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-12 15:27:22,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739606742] [2021-06-12 15:27:22,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:27:22,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:22,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:27:22,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:27:22,109 INFO L87 Difference]: Start difference. First operand 2988 states and 8353 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) [2021-06-12 15:27:22,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:22,640 INFO L93 Difference]: Finished difference Result 4006 states and 10592 transitions. [2021-06-12 15:27:22,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:27:22,641 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 [2021-06-12 15:27:22,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:22,644 INFO L225 Difference]: With dead ends: 4006 [2021-06-12 15:27:22,644 INFO L226 Difference]: Without dead ends: 3736 [2021-06-12 15:27:22,645 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 518.6ms TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 15:27:22,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3736 states. [2021-06-12 15:27:22,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3736 to 3063. [2021-06-12 15:27:22,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3062 states have (on average 2.8014369693011103) internal successors, (8578), 3062 states have internal predecessors, (8578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:22,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 8578 transitions. [2021-06-12 15:27:22,678 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 8578 transitions. Word has length 105 [2021-06-12 15:27:22,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:22,678 INFO L482 AbstractCegarLoop]: Abstraction has 3063 states and 8578 transitions. [2021-06-12 15:27:22,678 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) [2021-06-12 15:27:22,678 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 8578 transitions. [2021-06-12 15:27:22,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:27:22,680 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:22,680 INFO L472 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] [2021-06-12 15:27:22,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-12 15:27:22,881 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:22,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:22,881 INFO L82 PathProgramCache]: Analyzing trace with hash -868861765, now seen corresponding path program 111 times [2021-06-12 15:27:22,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:22,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890378997] [2021-06-12 15:27:22,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:23,095 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:23,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:23,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890378997] [2021-06-12 15:27:23,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890378997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:23,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315410974] [2021-06-12 15:27:23,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:23,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 15:27:23,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:23,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:27:23,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:23,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315410974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:23,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:23,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-12 15:27:23,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301609757] [2021-06-12 15:27:23,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:27:23,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:23,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:27:23,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:27:23,281 INFO L87 Difference]: Start difference. First operand 3063 states and 8578 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) [2021-06-12 15:27:23,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:23,746 INFO L93 Difference]: Finished difference Result 4031 states and 10717 transitions. [2021-06-12 15:27:23,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:27:23,746 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 [2021-06-12 15:27:23,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:23,750 INFO L225 Difference]: With dead ends: 4031 [2021-06-12 15:27:23,750 INFO L226 Difference]: Without dead ends: 3761 [2021-06-12 15:27:23,750 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 453.3ms TimeCoverageRelationStatistics Valid=719, Invalid=1933, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 15:27:23,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2021-06-12 15:27:23,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 3138. [2021-06-12 15:27:23,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3138 states, 3137 states have (on average 2.8061842524705134) internal successors, (8803), 3137 states have internal predecessors, (8803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:23,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3138 states to 3138 states and 8803 transitions. [2021-06-12 15:27:23,784 INFO L78 Accepts]: Start accepts. Automaton has 3138 states and 8803 transitions. Word has length 105 [2021-06-12 15:27:23,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:23,784 INFO L482 AbstractCegarLoop]: Abstraction has 3138 states and 8803 transitions. [2021-06-12 15:27:23,784 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) [2021-06-12 15:27:23,784 INFO L276 IsEmpty]: Start isEmpty. Operand 3138 states and 8803 transitions. [2021-06-12 15:27:23,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:27:23,786 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:23,786 INFO L472 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] [2021-06-12 15:27:23,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:23,989 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:23,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:23,989 INFO L82 PathProgramCache]: Analyzing trace with hash -439108181, now seen corresponding path program 112 times [2021-06-12 15:27:23,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:23,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720211896] [2021-06-12 15:27:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:24,132 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:24,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:24,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720211896] [2021-06-12 15:27:24,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720211896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:24,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403733372] [2021-06-12 15:27:24,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 15:27:24,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:24,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:24,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:27:24,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:24,334 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:24,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403733372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:24,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:24,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-12 15:27:24,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883138547] [2021-06-12 15:27:24,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:27:24,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:24,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:27:24,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:27:24,335 INFO L87 Difference]: Start difference. First operand 3138 states and 8803 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) [2021-06-12 15:27:24,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:24,915 INFO L93 Difference]: Finished difference Result 4116 states and 11007 transitions. [2021-06-12 15:27:24,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:27:24,916 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 [2021-06-12 15:27:24,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:24,920 INFO L225 Difference]: With dead ends: 4116 [2021-06-12 15:27:24,920 INFO L226 Difference]: Without dead ends: 3846 [2021-06-12 15:27:24,920 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 543.0ms TimeCoverageRelationStatistics Valid=750, Invalid=2112, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 15:27:24,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3846 states. [2021-06-12 15:27:24,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3846 to 3213. [2021-06-12 15:27:24,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3213 states, 3212 states have (on average 2.816936488169365) internal successors, (9048), 3212 states have internal predecessors, (9048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:24,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 9048 transitions. [2021-06-12 15:27:24,955 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 9048 transitions. Word has length 105 [2021-06-12 15:27:24,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:24,956 INFO L482 AbstractCegarLoop]: Abstraction has 3213 states and 9048 transitions. [2021-06-12 15:27:24,956 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) [2021-06-12 15:27:24,956 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 9048 transitions. [2021-06-12 15:27:24,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:27:24,958 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:24,958 INFO L472 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] [2021-06-12 15:27:25,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:25,158 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:25,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:25,159 INFO L82 PathProgramCache]: Analyzing trace with hash -496842311, now seen corresponding path program 113 times [2021-06-12 15:27:25,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:25,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950272396] [2021-06-12 15:27:25,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:25,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:25,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950272396] [2021-06-12 15:27:25,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950272396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:25,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763693852] [2021-06-12 15:27:25,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:25,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 15:27:25,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:25,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:27:25,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:25,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763693852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:25,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:25,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-12 15:27:25,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755102726] [2021-06-12 15:27:25,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 15:27:25,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:25,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 15:27:25,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-12 15:27:25,468 INFO L87 Difference]: Start difference. First operand 3213 states and 9048 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) [2021-06-12 15:27:25,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:25,986 INFO L93 Difference]: Finished difference Result 4858 states and 13131 transitions. [2021-06-12 15:27:25,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:27:25,987 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 [2021-06-12 15:27:25,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:25,992 INFO L225 Difference]: With dead ends: 4858 [2021-06-12 15:27:25,992 INFO L226 Difference]: Without dead ends: 4588 [2021-06-12 15:27:25,992 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 464.2ms TimeCoverageRelationStatistics Valid=823, Invalid=2039, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 15:27:25,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4588 states. [2021-06-12 15:27:26,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4588 to 3393. [2021-06-12 15:27:26,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3393 states, 3392 states have (on average 2.832252358490566) internal successors, (9607), 3392 states have internal predecessors, (9607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:26,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3393 states to 3393 states and 9607 transitions. [2021-06-12 15:27:26,033 INFO L78 Accepts]: Start accepts. Automaton has 3393 states and 9607 transitions. Word has length 105 [2021-06-12 15:27:26,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:26,033 INFO L482 AbstractCegarLoop]: Abstraction has 3393 states and 9607 transitions. [2021-06-12 15:27:26,033 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) [2021-06-12 15:27:26,033 INFO L276 IsEmpty]: Start isEmpty. Operand 3393 states and 9607 transitions. [2021-06-12 15:27:26,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-12 15:27:26,035 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:26,035 INFO L472 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] [2021-06-12 15:27:26,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:26,235 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:26,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:26,236 INFO L82 PathProgramCache]: Analyzing trace with hash -474499061, now seen corresponding path program 114 times [2021-06-12 15:27:26,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:26,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171095674] [2021-06-12 15:27:26,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:26,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:26,373 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:26,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:26,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171095674] [2021-06-12 15:27:26,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171095674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:26,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543736436] [2021-06-12 15:27:26,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:26,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 15:27:26,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:26,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 15:27:26,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:26,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543736436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:26,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:26,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-12 15:27:26,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87161580] [2021-06-12 15:27:26,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:27:26,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:26,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:27:26,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:27:26,565 INFO L87 Difference]: Start difference. First operand 3393 states and 9607 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) [2021-06-12 15:27:27,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:27,244 INFO L93 Difference]: Finished difference Result 4726 states and 12796 transitions. [2021-06-12 15:27:27,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:27:27,245 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 [2021-06-12 15:27:27,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:27,249 INFO L225 Difference]: With dead ends: 4726 [2021-06-12 15:27:27,249 INFO L226 Difference]: Without dead ends: 4151 [2021-06-12 15:27:27,249 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 628.7ms TimeCoverageRelationStatistics Valid=896, Invalid=2526, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 15:27:27,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-06-12 15:27:27,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3428. [2021-06-12 15:27:27,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.825503355704698) internal successors, (9683), 3427 states have internal predecessors, (9683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:27,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9683 transitions. [2021-06-12 15:27:27,283 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9683 transitions. Word has length 105 [2021-06-12 15:27:27,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:27,283 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9683 transitions. [2021-06-12 15:27:27,283 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) [2021-06-12 15:27:27,284 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9683 transitions. [2021-06-12 15:27:27,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:27:27,286 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:27,286 INFO L472 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] [2021-06-12 15:27:27,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-12 15:27:27,486 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:27,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:27,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1552772481, now seen corresponding path program 115 times [2021-06-12 15:27:27,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:27,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508276445] [2021-06-12 15:27:27,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:27,662 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:27,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:27,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508276445] [2021-06-12 15:27:27,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508276445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:27,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827618857] [2021-06-12 15:27:27,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:27,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:27:27,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:27,888 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:27,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827618857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:27,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:27,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 25 [2021-06-12 15:27:27,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485372039] [2021-06-12 15:27:27,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:27:27,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:27,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:27:27,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:27:27,889 INFO L87 Difference]: Start difference. First operand 3428 states and 9683 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) [2021-06-12 15:27:28,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:28,272 INFO L93 Difference]: Finished difference Result 4468 states and 12083 transitions. [2021-06-12 15:27:28,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:27:28,272 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 [2021-06-12 15:27:28,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:28,276 INFO L225 Difference]: With dead ends: 4468 [2021-06-12 15:27:28,276 INFO L226 Difference]: Without dead ends: 4134 [2021-06-12 15:27:28,277 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 424.0ms TimeCoverageRelationStatistics Valid=572, Invalid=1590, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 15:27:28,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4134 states. [2021-06-12 15:27:28,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4134 to 3513. [2021-06-12 15:27:28,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 3512 states have (on average 2.805523917995444) internal successors, (9853), 3512 states have internal predecessors, (9853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:28,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 9853 transitions. [2021-06-12 15:27:28,330 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 9853 transitions. Word has length 110 [2021-06-12 15:27:28,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:28,331 INFO L482 AbstractCegarLoop]: Abstraction has 3513 states and 9853 transitions. [2021-06-12 15:27:28,331 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) [2021-06-12 15:27:28,331 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 9853 transitions. [2021-06-12 15:27:28,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:27:28,333 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:28,333 INFO L472 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] [2021-06-12 15:27:28,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-12 15:27:28,534 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:28,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:28,534 INFO L82 PathProgramCache]: Analyzing trace with hash 642486821, now seen corresponding path program 116 times [2021-06-12 15:27:28,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:28,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928788071] [2021-06-12 15:27:28,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:28,699 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:28,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:28,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928788071] [2021-06-12 15:27:28,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928788071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:28,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459614807] [2021-06-12 15:27:28,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:28,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:28,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:28,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:27:28,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:28,904 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:28,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459614807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:28,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:28,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-12 15:27:28,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452456402] [2021-06-12 15:27:28,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:27:28,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:28,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:27:28,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:27:28,905 INFO L87 Difference]: Start difference. First operand 3513 states and 9853 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) [2021-06-12 15:27:29,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:29,198 INFO L93 Difference]: Finished difference Result 5061 states and 13077 transitions. [2021-06-12 15:27:29,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:27:29,199 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 [2021-06-12 15:27:29,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:29,204 INFO L225 Difference]: With dead ends: 5061 [2021-06-12 15:27:29,204 INFO L226 Difference]: Without dead ends: 4791 [2021-06-12 15:27:29,204 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 339.5ms TimeCoverageRelationStatistics Valid=446, Invalid=1194, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 15:27:29,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4791 states. [2021-06-12 15:27:29,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4791 to 3528. [2021-06-12 15:27:29,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:29,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-12 15:27:29,250 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-12 15:27:29,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:29,250 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-12 15:27:29,250 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) [2021-06-12 15:27:29,250 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-12 15:27:29,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:27:29,253 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:29,253 INFO L472 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] [2021-06-12 15:27:29,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-12 15:27:29,454 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:29,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:29,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1552838891, now seen corresponding path program 117 times [2021-06-12 15:27:29,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:29,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297830620] [2021-06-12 15:27:29,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:29,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:29,633 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:29,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:29,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297830620] [2021-06-12 15:27:29,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297830620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:29,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815329344] [2021-06-12 15:27:29,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:29,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 15:27:29,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:29,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:27:29,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:29,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815329344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:29,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:29,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-12 15:27:29,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258534966] [2021-06-12 15:27:29,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:27:29,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:29,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:27:29,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:27:29,854 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 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) [2021-06-12 15:27:30,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:30,268 INFO L93 Difference]: Finished difference Result 4946 states and 12847 transitions. [2021-06-12 15:27:30,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:27:30,268 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 [2021-06-12 15:27:30,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:30,273 INFO L225 Difference]: With dead ends: 4946 [2021-06-12 15:27:30,273 INFO L226 Difference]: Without dead ends: 4676 [2021-06-12 15:27:30,273 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 446.2ms TimeCoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 15:27:30,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4676 states. [2021-06-12 15:27:30,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4676 to 3528. [2021-06-12 15:27:30,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:30,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-12 15:27:30,312 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-12 15:27:30,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:30,312 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-12 15:27:30,312 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) [2021-06-12 15:27:30,312 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-12 15:27:30,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:27:30,315 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:30,315 INFO L472 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] [2021-06-12 15:27:30,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-12 15:27:30,516 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:30,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:30,516 INFO L82 PathProgramCache]: Analyzing trace with hash -42638813, now seen corresponding path program 118 times [2021-06-12 15:27:30,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:30,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262501293] [2021-06-12 15:27:30,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:30,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:30,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:30,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262501293] [2021-06-12 15:27:30,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262501293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:30,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905664990] [2021-06-12 15:27:30,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:30,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:30,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:30,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:27:30,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:30,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905664990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:30,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:30,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-12 15:27:30,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896813115] [2021-06-12 15:27:30,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:27:30,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:30,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:27:30,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:27:30,884 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 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) [2021-06-12 15:27:31,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:31,211 INFO L93 Difference]: Finished difference Result 4921 states and 12797 transitions. [2021-06-12 15:27:31,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 15:27:31,211 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 [2021-06-12 15:27:31,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:31,217 INFO L225 Difference]: With dead ends: 4921 [2021-06-12 15:27:31,217 INFO L226 Difference]: Without dead ends: 4651 [2021-06-12 15:27:31,217 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 362.7ms TimeCoverageRelationStatistics Valid=454, Invalid=1352, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 15:27:31,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4651 states. [2021-06-12 15:27:31,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 3528. [2021-06-12 15:27:31,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:31,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-12 15:27:31,256 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-12 15:27:31,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:31,256 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-12 15:27:31,256 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) [2021-06-12 15:27:31,256 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-12 15:27:31,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:27:31,259 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:31,259 INFO L472 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] [2021-06-12 15:27:31,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-12 15:27:31,461 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:31,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:31,461 INFO L82 PathProgramCache]: Analyzing trace with hash 597019411, now seen corresponding path program 119 times [2021-06-12 15:27:31,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:31,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268156265] [2021-06-12 15:27:31,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:31,633 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:31,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:31,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268156265] [2021-06-12 15:27:31,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268156265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:31,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027284871] [2021-06-12 15:27:31,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:31,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 15:27:31,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:31,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:27:31,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:31,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027284871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:31,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:31,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-12 15:27:31,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606516036] [2021-06-12 15:27:31,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:27:31,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:31,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:27:31,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:27:31,874 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 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) [2021-06-12 15:27:32,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:32,316 INFO L93 Difference]: Finished difference Result 4871 states and 12697 transitions. [2021-06-12 15:27:32,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:27:32,316 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 [2021-06-12 15:27:32,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:32,322 INFO L225 Difference]: With dead ends: 4871 [2021-06-12 15:27:32,322 INFO L226 Difference]: Without dead ends: 4601 [2021-06-12 15:27:32,322 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 457.2ms TimeCoverageRelationStatistics Valid=523, Invalid=1639, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 15:27:32,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2021-06-12 15:27:32,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 3528. [2021-06-12 15:27:32,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:32,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-12 15:27:32,362 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-12 15:27:32,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:32,362 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-12 15:27:32,362 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) [2021-06-12 15:27:32,362 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-12 15:27:32,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:27:32,365 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:32,365 INFO L472 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] [2021-06-12 15:27:32,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:32,566 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:32,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:32,567 INFO L82 PathProgramCache]: Analyzing trace with hash -177899615, now seen corresponding path program 120 times [2021-06-12 15:27:32,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:32,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619137554] [2021-06-12 15:27:32,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:32,721 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:32,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:32,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619137554] [2021-06-12 15:27:32,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619137554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:32,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588707344] [2021-06-12 15:27:32,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:32,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 15:27:32,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:32,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:27:32,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:32,922 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:32,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588707344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:32,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:32,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-12 15:27:32,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768058208] [2021-06-12 15:27:32,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:27:32,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:32,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:27:32,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:27:32,923 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 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) [2021-06-12 15:27:33,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:33,301 INFO L93 Difference]: Finished difference Result 4821 states and 12597 transitions. [2021-06-12 15:27:33,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 15:27:33,302 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 [2021-06-12 15:27:33,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:33,306 INFO L225 Difference]: With dead ends: 4821 [2021-06-12 15:27:33,306 INFO L226 Difference]: Without dead ends: 4551 [2021-06-12 15:27:33,307 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 373.8ms TimeCoverageRelationStatistics Valid=478, Invalid=1502, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 15:27:33,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4551 states. [2021-06-12 15:27:33,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4551 to 3528. [2021-06-12 15:27:33,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:33,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-12 15:27:33,354 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-12 15:27:33,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:33,354 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-12 15:27:33,354 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) [2021-06-12 15:27:33,354 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-12 15:27:33,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:27:33,357 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:33,357 INFO L472 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] [2021-06-12 15:27:33,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-12 15:27:33,558 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:33,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:33,558 INFO L82 PathProgramCache]: Analyzing trace with hash -631812975, now seen corresponding path program 121 times [2021-06-12 15:27:33,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:33,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6701574] [2021-06-12 15:27:33,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:33,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:33,715 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:33,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:33,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6701574] [2021-06-12 15:27:33,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6701574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:33,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047362403] [2021-06-12 15:27:33,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:33,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:27:33,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:33,923 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:33,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047362403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:33,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:33,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-12 15:27:33,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017040142] [2021-06-12 15:27:33,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:27:33,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:33,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:27:33,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:27:33,924 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 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) [2021-06-12 15:27:34,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:34,427 INFO L93 Difference]: Finished difference Result 4771 states and 12497 transitions. [2021-06-12 15:27:34,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:27:34,428 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 [2021-06-12 15:27:34,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:34,432 INFO L225 Difference]: With dead ends: 4771 [2021-06-12 15:27:34,432 INFO L226 Difference]: Without dead ends: 4501 [2021-06-12 15:27:34,432 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 477.4ms TimeCoverageRelationStatistics Valid=555, Invalid=1797, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 15:27:34,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4501 states. [2021-06-12 15:27:34,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4501 to 3528. [2021-06-12 15:27:34,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:34,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-12 15:27:34,467 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-12 15:27:34,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:34,467 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-12 15:27:34,468 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) [2021-06-12 15:27:34,468 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-12 15:27:34,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:27:34,470 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:34,470 INFO L472 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] [2021-06-12 15:27:34,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-12 15:27:34,671 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:34,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:34,671 INFO L82 PathProgramCache]: Analyzing trace with hash 246198943, now seen corresponding path program 122 times [2021-06-12 15:27:34,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:34,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982211203] [2021-06-12 15:27:34,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:34,810 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:34,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:34,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982211203] [2021-06-12 15:27:34,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982211203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:34,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218997059] [2021-06-12 15:27:34,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:34,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:34,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:34,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:27:34,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:35,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218997059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:35,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:35,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-12 15:27:35,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933839142] [2021-06-12 15:27:35,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:27:35,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:35,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:27:35,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:27:35,005 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 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) [2021-06-12 15:27:35,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:35,414 INFO L93 Difference]: Finished difference Result 4721 states and 12397 transitions. [2021-06-12 15:27:35,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:27:35,414 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 [2021-06-12 15:27:35,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:35,419 INFO L225 Difference]: With dead ends: 4721 [2021-06-12 15:27:35,419 INFO L226 Difference]: Without dead ends: 4451 [2021-06-12 15:27:35,419 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 412.8ms TimeCoverageRelationStatistics Valid=518, Invalid=1644, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 15:27:35,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-06-12 15:27:35,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 3528. [2021-06-12 15:27:35,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:35,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-12 15:27:35,458 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-12 15:27:35,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:35,458 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-12 15:27:35,458 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) [2021-06-12 15:27:35,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-12 15:27:35,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:27:35,461 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:35,461 INFO L472 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] [2021-06-12 15:27:35,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:35,662 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:35,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:35,663 INFO L82 PathProgramCache]: Analyzing trace with hash -653855857, now seen corresponding path program 123 times [2021-06-12 15:27:35,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:35,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574907748] [2021-06-12 15:27:35,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:35,810 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:35,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:35,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574907748] [2021-06-12 15:27:35,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574907748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:35,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657944853] [2021-06-12 15:27:35,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:35,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 15:27:35,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:35,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:27:35,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:36,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657944853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:36,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:36,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-12 15:27:36,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761175840] [2021-06-12 15:27:36,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:27:36,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:36,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:27:36,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:27:36,019 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 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) [2021-06-12 15:27:36,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:36,545 INFO L93 Difference]: Finished difference Result 4671 states and 12297 transitions. [2021-06-12 15:27:36,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:27:36,545 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 [2021-06-12 15:27:36,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:36,550 INFO L225 Difference]: With dead ends: 4671 [2021-06-12 15:27:36,550 INFO L226 Difference]: Without dead ends: 4401 [2021-06-12 15:27:36,550 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 520.1ms TimeCoverageRelationStatistics Valid=603, Invalid=1947, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 15:27:36,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-06-12 15:27:36,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 3528. [2021-06-12 15:27:36,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:36,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-12 15:27:36,586 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-12 15:27:36,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:36,586 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-12 15:27:36,586 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) [2021-06-12 15:27:36,586 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-12 15:27:36,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:27:36,588 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:36,589 INFO L472 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] [2021-06-12 15:27:36,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:36,789 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:36,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:36,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1082920163, now seen corresponding path program 124 times [2021-06-12 15:27:36,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:36,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346785070] [2021-06-12 15:27:36,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:36,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:36,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:36,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346785070] [2021-06-12 15:27:36,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346785070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:36,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560235287] [2021-06-12 15:27:36,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:37,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:37,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:37,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:27:37,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:37,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560235287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:37,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:37,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-12 15:27:37,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216696909] [2021-06-12 15:27:37,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:27:37,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:37,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:27:37,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:27:37,146 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 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) [2021-06-12 15:27:37,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:37,565 INFO L93 Difference]: Finished difference Result 4621 states and 12197 transitions. [2021-06-12 15:27:37,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:27:37,565 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 [2021-06-12 15:27:37,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:37,569 INFO L225 Difference]: With dead ends: 4621 [2021-06-12 15:27:37,570 INFO L226 Difference]: Without dead ends: 4351 [2021-06-12 15:27:37,570 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 425.4ms TimeCoverageRelationStatistics Valid=574, Invalid=1778, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 15:27:37,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4351 states. [2021-06-12 15:27:37,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4351 to 3528. [2021-06-12 15:27:37,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:37,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-12 15:27:37,606 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-12 15:27:37,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:37,607 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-12 15:27:37,607 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) [2021-06-12 15:27:37,607 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-12 15:27:37,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:27:37,609 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:37,609 INFO L472 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] [2021-06-12 15:27:37,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:37,810 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:37,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:37,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1769103347, now seen corresponding path program 125 times [2021-06-12 15:27:37,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:37,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428369447] [2021-06-12 15:27:37,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:37,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:37,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428369447] [2021-06-12 15:27:37,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428369447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:37,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473524113] [2021-06-12 15:27:37,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:38,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 15:27:38,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:38,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:27:38,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:38,171 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:38,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473524113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:38,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:38,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-12 15:27:38,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801849971] [2021-06-12 15:27:38,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:27:38,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:38,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:27:38,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:27:38,172 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 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) [2021-06-12 15:27:38,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:38,755 INFO L93 Difference]: Finished difference Result 4571 states and 12097 transitions. [2021-06-12 15:27:38,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:27:38,756 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 [2021-06-12 15:27:38,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:38,760 INFO L225 Difference]: With dead ends: 4571 [2021-06-12 15:27:38,760 INFO L226 Difference]: Without dead ends: 4301 [2021-06-12 15:27:38,760 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 566.5ms TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 15:27:38,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4301 states. [2021-06-12 15:27:38,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4301 to 3528. [2021-06-12 15:27:38,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:38,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-12 15:27:38,796 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-12 15:27:38,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:38,796 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-12 15:27:38,796 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) [2021-06-12 15:27:38,796 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-12 15:27:38,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:27:38,799 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:38,799 INFO L472 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] [2021-06-12 15:27:38,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-12 15:27:38,999 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:39,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:39,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1854138085, now seen corresponding path program 126 times [2021-06-12 15:27:39,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:39,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351189119] [2021-06-12 15:27:39,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:39,124 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:39,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:39,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351189119] [2021-06-12 15:27:39,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351189119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:39,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195567124] [2021-06-12 15:27:39,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:39,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 15:27:39,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:39,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:27:39,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:39,312 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:39,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195567124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:39,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:39,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-12 15:27:39,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483274667] [2021-06-12 15:27:39,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:27:39,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:39,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:27:39,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:27:39,313 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 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) [2021-06-12 15:27:39,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:39,788 INFO L93 Difference]: Finished difference Result 4521 states and 11997 transitions. [2021-06-12 15:27:39,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:27:39,789 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 [2021-06-12 15:27:39,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:39,793 INFO L225 Difference]: With dead ends: 4521 [2021-06-12 15:27:39,793 INFO L226 Difference]: Without dead ends: 4251 [2021-06-12 15:27:39,793 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 444.5ms TimeCoverageRelationStatistics Valid=646, Invalid=1904, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 15:27:39,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-06-12 15:27:39,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 3528. [2021-06-12 15:27:39,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:39,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-12 15:27:39,830 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-12 15:27:39,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:39,830 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-12 15:27:39,830 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) [2021-06-12 15:27:39,830 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-12 15:27:39,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:27:39,833 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:39,833 INFO L472 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] [2021-06-12 15:27:40,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-12 15:27:40,040 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:40,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:40,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1922289141, now seen corresponding path program 127 times [2021-06-12 15:27:40,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:40,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701375320] [2021-06-12 15:27:40,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:40,195 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:40,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:40,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701375320] [2021-06-12 15:27:40,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701375320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:40,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431900397] [2021-06-12 15:27:40,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:40,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:40,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:27:40,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:40,393 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:40,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431900397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:40,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:40,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-12 15:27:40,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344054894] [2021-06-12 15:27:40,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:27:40,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:40,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:27:40,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:27:40,394 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 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) [2021-06-12 15:27:40,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:41,000 INFO L93 Difference]: Finished difference Result 4471 states and 11897 transitions. [2021-06-12 15:27:41,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:27:41,000 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 [2021-06-12 15:27:41,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:41,004 INFO L225 Difference]: With dead ends: 4471 [2021-06-12 15:27:41,005 INFO L226 Difference]: Without dead ends: 4201 [2021-06-12 15:27:41,005 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 596.4ms TimeCoverageRelationStatistics Valid=747, Invalid=2223, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 15:27:41,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-06-12 15:27:41,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 3528. [2021-06-12 15:27:41,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:41,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-12 15:27:41,041 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-12 15:27:41,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:41,041 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-12 15:27:41,041 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) [2021-06-12 15:27:41,041 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-12 15:27:41,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:27:41,044 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:41,044 INFO L472 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] [2021-06-12 15:27:41,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:41,245 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:41,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:41,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1075709081, now seen corresponding path program 128 times [2021-06-12 15:27:41,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:41,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605122261] [2021-06-12 15:27:41,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:41,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:41,380 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:41,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:41,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605122261] [2021-06-12 15:27:41,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605122261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:41,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678222556] [2021-06-12 15:27:41,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:41,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:41,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:41,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:27:41,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:41,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678222556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:41,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:41,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-12 15:27:41,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452976244] [2021-06-12 15:27:41,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:27:41,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:41,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:27:41,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:27:41,561 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 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) [2021-06-12 15:27:42,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:42,068 INFO L93 Difference]: Finished difference Result 4421 states and 11797 transitions. [2021-06-12 15:27:42,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:27:42,069 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 [2021-06-12 15:27:42,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:42,073 INFO L225 Difference]: With dead ends: 4421 [2021-06-12 15:27:42,073 INFO L226 Difference]: Without dead ends: 4151 [2021-06-12 15:27:42,073 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 492.7ms TimeCoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 15:27:42,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-06-12 15:27:42,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3528. [2021-06-12 15:27:42,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:42,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-12 15:27:42,109 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-12 15:27:42,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:42,109 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-12 15:27:42,109 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) [2021-06-12 15:27:42,109 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-12 15:27:42,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:27:42,112 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:42,112 INFO L472 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] [2021-06-12 15:27:42,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-12 15:27:42,312 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:42,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:42,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1505462665, now seen corresponding path program 129 times [2021-06-12 15:27:42,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:42,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263026347] [2021-06-12 15:27:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:42,446 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:42,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:42,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263026347] [2021-06-12 15:27:42,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263026347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:42,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561991703] [2021-06-12 15:27:42,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:42,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 15:27:42,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:42,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:27:42,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:42,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561991703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:42,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:42,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-12 15:27:42,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682181136] [2021-06-12 15:27:42,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:27:42,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:42,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:27:42,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:27:42,668 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 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) [2021-06-12 15:27:43,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:43,326 INFO L93 Difference]: Finished difference Result 4431 states and 11847 transitions. [2021-06-12 15:27:43,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:27:43,332 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 [2021-06-12 15:27:43,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:43,336 INFO L225 Difference]: With dead ends: 4431 [2021-06-12 15:27:43,336 INFO L226 Difference]: Without dead ends: 4161 [2021-06-12 15:27:43,337 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 621.9ms TimeCoverageRelationStatistics Valid=843, Invalid=2349, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 15:27:43,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4161 states. [2021-06-12 15:27:43,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4161 to 3528. [2021-06-12 15:27:43,378 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) [2021-06-12 15:27:43,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9888 transitions. [2021-06-12 15:27:43,382 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9888 transitions. Word has length 110 [2021-06-12 15:27:43,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:43,382 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9888 transitions. [2021-06-12 15:27:43,382 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) [2021-06-12 15:27:43,382 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9888 transitions. [2021-06-12 15:27:43,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:27:43,385 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:43,385 INFO L472 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] [2021-06-12 15:27:43,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-12 15:27:43,593 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:43,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:43,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1447728535, now seen corresponding path program 130 times [2021-06-12 15:27:43,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:43,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416070661] [2021-06-12 15:27:43,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:43,741 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:43,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:43,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416070661] [2021-06-12 15:27:43,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416070661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:43,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613510681] [2021-06-12 15:27:43,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:43,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:43,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:43,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:27:43,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:43,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613510681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:43,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:43,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-12 15:27:43,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630736819] [2021-06-12 15:27:43,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:27:43,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:43,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:27:43,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:27:43,917 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) [2021-06-12 15:27:44,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:44,445 INFO L93 Difference]: Finished difference Result 5198 states and 14021 transitions. [2021-06-12 15:27:44,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:27:44,446 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 [2021-06-12 15:27:44,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:44,450 INFO L225 Difference]: With dead ends: 5198 [2021-06-12 15:27:44,450 INFO L226 Difference]: Without dead ends: 4928 [2021-06-12 15:27:44,451 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 479.1ms TimeCoverageRelationStatistics Valid=839, Invalid=2131, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 15:27:44,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2021-06-12 15:27:44,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 3708. [2021-06-12 15:27:44,485 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) [2021-06-12 15:27:44,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 10447 transitions. [2021-06-12 15:27:44,489 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 10447 transitions. Word has length 110 [2021-06-12 15:27:44,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:44,489 INFO L482 AbstractCegarLoop]: Abstraction has 3708 states and 10447 transitions. [2021-06-12 15:27:44,489 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) [2021-06-12 15:27:44,489 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 10447 transitions. [2021-06-12 15:27:44,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 15:27:44,492 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:44,492 INFO L472 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] [2021-06-12 15:27:44,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-12 15:27:44,692 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:44,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:44,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1470071785, now seen corresponding path program 131 times [2021-06-12 15:27:44,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:44,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981774524] [2021-06-12 15:27:44,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:44,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:44,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:44,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981774524] [2021-06-12 15:27:44,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981774524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:44,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961314064] [2021-06-12 15:27:44,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:44,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 15:27:44,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:44,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:27:44,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:45,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961314064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:45,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:45,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-12 15:27:45,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446066428] [2021-06-12 15:27:45,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:27:45,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:45,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:27:45,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:27:45,012 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) [2021-06-12 15:27:45,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:45,761 INFO L93 Difference]: Finished difference Result 5021 states and 13521 transitions. [2021-06-12 15:27:45,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:27:45,761 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 [2021-06-12 15:27:45,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:45,765 INFO L225 Difference]: With dead ends: 5021 [2021-06-12 15:27:45,766 INFO L226 Difference]: Without dead ends: 4446 [2021-06-12 15:27:45,766 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 695.7ms TimeCoverageRelationStatistics Valid=997, Invalid=2785, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 15:27:45,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4446 states. [2021-06-12 15:27:45,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4446 to 2603. [2021-06-12 15:27:45,792 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) [2021-06-12 15:27:45,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7118 transitions. [2021-06-12 15:27:45,795 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7118 transitions. Word has length 110 [2021-06-12 15:27:45,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:45,795 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7118 transitions. [2021-06-12 15:27:45,795 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) [2021-06-12 15:27:45,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7118 transitions. [2021-06-12 15:27:45,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:27:45,797 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:45,797 INFO L472 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] [2021-06-12 15:27:45,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:45,998 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:45,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:45,998 INFO L82 PathProgramCache]: Analyzing trace with hash 2082436406, now seen corresponding path program 132 times [2021-06-12 15:27:45,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:45,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681615329] [2021-06-12 15:27:45,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:46,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:46,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681615329] [2021-06-12 15:27:46,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681615329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:46,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675275072] [2021-06-12 15:27:46,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:46,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 15:27:46,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:46,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:27:46,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:46,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675275072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:46,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:46,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-12 15:27:46,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622214900] [2021-06-12 15:27:46,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:27:46,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:46,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:27:46,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:27:46,373 INFO L87 Difference]: Start difference. First operand 2603 states and 7118 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:46,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:46,723 INFO L93 Difference]: Finished difference Result 3821 states and 9757 transitions. [2021-06-12 15:27:46,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:27:46,723 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-12 15:27:46,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:46,726 INFO L225 Difference]: With dead ends: 3821 [2021-06-12 15:27:46,726 INFO L226 Difference]: Without dead ends: 3551 [2021-06-12 15:27:46,726 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 373.6ms TimeCoverageRelationStatistics Valid=479, Invalid=1413, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 15:27:46,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2021-06-12 15:27:46,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 2678. [2021-06-12 15:27:46,749 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) [2021-06-12 15:27:46,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7343 transitions. [2021-06-12 15:27:46,752 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7343 transitions. Word has length 115 [2021-06-12 15:27:46,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:46,752 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7343 transitions. [2021-06-12 15:27:46,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:46,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7343 transitions. [2021-06-12 15:27:46,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:27:46,754 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:46,754 INFO L472 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] [2021-06-12 15:27:46,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:46,955 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:46,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:46,955 INFO L82 PathProgramCache]: Analyzing trace with hash -112889306, now seen corresponding path program 133 times [2021-06-12 15:27:46,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:46,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372248780] [2021-06-12 15:27:46,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:46,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:47,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:47,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372248780] [2021-06-12 15:27:47,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372248780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:47,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152170267] [2021-06-12 15:27:47,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:47,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:47,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:27:47,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:47,339 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:47,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152170267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:47,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:47,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-12 15:27:47,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161915843] [2021-06-12 15:27:47,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:27:47,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:47,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:27:47,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:27:47,340 INFO L87 Difference]: Start difference. First operand 2678 states and 7343 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:47,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:47,721 INFO L93 Difference]: Finished difference Result 4241 states and 10672 transitions. [2021-06-12 15:27:47,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:27:47,721 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 [2021-06-12 15:27:47,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:47,725 INFO L225 Difference]: With dead ends: 4241 [2021-06-12 15:27:47,725 INFO L226 Difference]: Without dead ends: 3971 [2021-06-12 15:27:47,725 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 432.3ms TimeCoverageRelationStatistics Valid=529, Invalid=1633, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 15:27:47,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2021-06-12 15:27:47,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 2753. [2021-06-12 15:27:47,753 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) [2021-06-12 15:27:47,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7568 transitions. [2021-06-12 15:27:47,756 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7568 transitions. Word has length 115 [2021-06-12 15:27:47,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:47,756 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7568 transitions. [2021-06-12 15:27:47,756 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) [2021-06-12 15:27:47,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7568 transitions. [2021-06-12 15:27:47,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:27:47,758 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:47,758 INFO L472 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] [2021-06-12 15:27:47,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:47,959 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:47,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:47,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1397310772, now seen corresponding path program 134 times [2021-06-12 15:27:47,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:47,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735689329] [2021-06-12 15:27:47,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:48,122 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:48,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:48,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735689329] [2021-06-12 15:27:48,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735689329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:48,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383916055] [2021-06-12 15:27:48,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:48,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:48,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:48,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:27:48,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:48,315 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:48,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383916055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:48,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:48,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-12 15:27:48,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006881172] [2021-06-12 15:27:48,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:27:48,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:48,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:27:48,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:27:48,316 INFO L87 Difference]: Start difference. First operand 2753 states and 7568 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:48,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:48,697 INFO L93 Difference]: Finished difference Result 4271 states and 10807 transitions. [2021-06-12 15:27:48,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:27:48,698 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-12 15:27:48,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:48,702 INFO L225 Difference]: With dead ends: 4271 [2021-06-12 15:27:48,702 INFO L226 Difference]: Without dead ends: 4001 [2021-06-12 15:27:48,702 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 393.3ms TimeCoverageRelationStatistics Valid=531, Invalid=1631, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 15:27:48,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-06-12 15:27:48,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 2828. [2021-06-12 15:27:48,730 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) [2021-06-12 15:27:48,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7793 transitions. [2021-06-12 15:27:48,734 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7793 transitions. Word has length 115 [2021-06-12 15:27:48,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:48,734 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7793 transitions. [2021-06-12 15:27:48,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:48,734 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7793 transitions. [2021-06-12 15:27:48,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:27:48,736 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:48,736 INFO L472 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] [2021-06-12 15:27:48,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-06-12 15:27:48,936 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:48,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:48,936 INFO L82 PathProgramCache]: Analyzing trace with hash 2036968996, now seen corresponding path program 135 times [2021-06-12 15:27:48,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:48,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658848993] [2021-06-12 15:27:48,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:49,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:49,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658848993] [2021-06-12 15:27:49,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658848993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:49,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469646510] [2021-06-12 15:27:49,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:49,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 15:27:49,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:49,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:27:49,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:49,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469646510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:49,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:49,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-12 15:27:49,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404313053] [2021-06-12 15:27:49,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:27:49,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:49,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:27:49,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:27:49,311 INFO L87 Difference]: Start difference. First operand 2828 states and 7793 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:49,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:49,760 INFO L93 Difference]: Finished difference Result 4296 states and 10932 transitions. [2021-06-12 15:27:49,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:27:49,760 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 [2021-06-12 15:27:49,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:49,764 INFO L225 Difference]: With dead ends: 4296 [2021-06-12 15:27:49,764 INFO L226 Difference]: Without dead ends: 4026 [2021-06-12 15:27:49,764 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 465.3ms TimeCoverageRelationStatistics Valid=553, Invalid=1799, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 15:27:49,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-06-12 15:27:49,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 2903. [2021-06-12 15:27:49,792 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) [2021-06-12 15:27:49,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 8018 transitions. [2021-06-12 15:27:49,795 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 8018 transitions. Word has length 115 [2021-06-12 15:27:49,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:49,795 INFO L482 AbstractCegarLoop]: Abstraction has 2903 states and 8018 transitions. [2021-06-12 15:27:49,796 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) [2021-06-12 15:27:49,796 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 8018 transitions. [2021-06-12 15:27:49,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:27:49,798 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:49,798 INFO L472 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] [2021-06-12 15:27:49,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:49,998 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:49,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:49,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1262049970, now seen corresponding path program 136 times [2021-06-12 15:27:49,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:49,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959522945] [2021-06-12 15:27:49,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:50,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:50,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959522945] [2021-06-12 15:27:50,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959522945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:50,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154569034] [2021-06-12 15:27:50,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:50,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:50,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:50,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:27:50,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:50,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154569034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:50,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:50,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-12 15:27:50,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954687848] [2021-06-12 15:27:50,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:27:50,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:50,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:27:50,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:27:50,350 INFO L87 Difference]: Start difference. First operand 2903 states and 8018 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:50,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:50,777 INFO L93 Difference]: Finished difference Result 4321 states and 11057 transitions. [2021-06-12 15:27:50,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:27:50,777 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-12 15:27:50,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:50,781 INFO L225 Difference]: With dead ends: 4321 [2021-06-12 15:27:50,781 INFO L226 Difference]: Without dead ends: 4051 [2021-06-12 15:27:50,781 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 436.8ms TimeCoverageRelationStatistics Valid=569, Invalid=1783, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 15:27:50,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-12 15:27:50,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 2978. [2021-06-12 15:27:50,810 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) [2021-06-12 15:27:50,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 8243 transitions. [2021-06-12 15:27:50,813 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 8243 transitions. Word has length 115 [2021-06-12 15:27:50,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:50,813 INFO L482 AbstractCegarLoop]: Abstraction has 2978 states and 8243 transitions. [2021-06-12 15:27:50,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:50,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 8243 transitions. [2021-06-12 15:27:50,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:27:50,815 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:50,816 INFO L472 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] [2021-06-12 15:27:51,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-12 15:27:51,016 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:51,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:51,016 INFO L82 PathProgramCache]: Analyzing trace with hash 808136610, now seen corresponding path program 137 times [2021-06-12 15:27:51,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:51,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537398472] [2021-06-12 15:27:51,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:51,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:51,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537398472] [2021-06-12 15:27:51,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537398472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:51,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557293032] [2021-06-12 15:27:51,186 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:51,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 15:27:51,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:51,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:27:51,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:51,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557293032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:51,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:51,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-12 15:27:51,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695020171] [2021-06-12 15:27:51,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:27:51,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:51,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:27:51,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:27:51,408 INFO L87 Difference]: Start difference. First operand 2978 states and 8243 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:51,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:51,948 INFO L93 Difference]: Finished difference Result 4346 states and 11182 transitions. [2021-06-12 15:27:51,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:27:51,948 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 [2021-06-12 15:27:51,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:51,952 INFO L225 Difference]: With dead ends: 4346 [2021-06-12 15:27:51,952 INFO L226 Difference]: Without dead ends: 4076 [2021-06-12 15:27:51,952 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 545.8ms TimeCoverageRelationStatistics Valid=593, Invalid=1957, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 15:27:51,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-12 15:27:51,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3053. [2021-06-12 15:27:51,980 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) [2021-06-12 15:27:51,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 8468 transitions. [2021-06-12 15:27:51,984 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 8468 transitions. Word has length 115 [2021-06-12 15:27:51,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:51,984 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 8468 transitions. [2021-06-12 15:27:51,984 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) [2021-06-12 15:27:51,987 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 8468 transitions. [2021-06-12 15:27:51,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:27:51,989 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:51,989 INFO L472 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] [2021-06-12 15:27:52,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:52,206 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:52,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:52,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1686148528, now seen corresponding path program 138 times [2021-06-12 15:27:52,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:52,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51713799] [2021-06-12 15:27:52,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:52,363 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:52,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:52,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51713799] [2021-06-12 15:27:52,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51713799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:52,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593617223] [2021-06-12 15:27:52,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:52,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 15:27:52,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:52,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:27:52,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:52,551 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:52,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593617223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:52,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:52,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-12 15:27:52,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210065546] [2021-06-12 15:27:52,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:27:52,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:52,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:27:52,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:27:52,552 INFO L87 Difference]: Start difference. First operand 3053 states and 8468 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:52,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:52,999 INFO L93 Difference]: Finished difference Result 4371 states and 11307 transitions. [2021-06-12 15:27:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:27:52,999 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-12 15:27:52,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:53,003 INFO L225 Difference]: With dead ends: 4371 [2021-06-12 15:27:53,003 INFO L226 Difference]: Without dead ends: 4101 [2021-06-12 15:27:53,003 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 439.4ms TimeCoverageRelationStatistics Valid=623, Invalid=1927, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 15:27:53,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4101 states. [2021-06-12 15:27:53,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4101 to 3128. [2021-06-12 15:27:53,033 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) [2021-06-12 15:27:53,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 8693 transitions. [2021-06-12 15:27:53,036 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 8693 transitions. Word has length 115 [2021-06-12 15:27:53,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:53,036 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 8693 transitions. [2021-06-12 15:27:53,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:53,036 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 8693 transitions. [2021-06-12 15:27:53,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:27:53,038 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:53,038 INFO L472 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] [2021-06-12 15:27:53,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-12 15:27:53,239 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:53,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:53,239 INFO L82 PathProgramCache]: Analyzing trace with hash 786093728, now seen corresponding path program 139 times [2021-06-12 15:27:53,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:53,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039403256] [2021-06-12 15:27:53,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:53,382 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:53,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:53,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039403256] [2021-06-12 15:27:53,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039403256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:53,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045222459] [2021-06-12 15:27:53,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:53,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:27:53,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:53,587 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:53,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045222459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:53,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:53,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-12 15:27:53,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118114134] [2021-06-12 15:27:53,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:27:53,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:53,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:27:53,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:27:53,588 INFO L87 Difference]: Start difference. First operand 3128 states and 8693 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:54,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:54,122 INFO L93 Difference]: Finished difference Result 4396 states and 11432 transitions. [2021-06-12 15:27:54,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:27:54,122 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 [2021-06-12 15:27:54,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:54,126 INFO L225 Difference]: With dead ends: 4396 [2021-06-12 15:27:54,126 INFO L226 Difference]: Without dead ends: 4126 [2021-06-12 15:27:54,127 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 515.1ms TimeCoverageRelationStatistics Valid=649, Invalid=2107, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 15:27:54,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-12 15:27:54,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 3203. [2021-06-12 15:27:54,161 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) [2021-06-12 15:27:54,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8918 transitions. [2021-06-12 15:27:54,165 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8918 transitions. Word has length 115 [2021-06-12 15:27:54,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:54,165 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8918 transitions. [2021-06-12 15:27:54,165 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) [2021-06-12 15:27:54,165 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8918 transitions. [2021-06-12 15:27:54,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:27:54,167 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:54,167 INFO L472 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] [2021-06-12 15:27:54,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-12 15:27:54,368 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:54,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:54,368 INFO L82 PathProgramCache]: Analyzing trace with hash 357029422, now seen corresponding path program 140 times [2021-06-12 15:27:54,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:54,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792650074] [2021-06-12 15:27:54,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:54,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:54,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:54,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792650074] [2021-06-12 15:27:54,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792650074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:54,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821654995] [2021-06-12 15:27:54,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:54,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:27:54,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:54,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:27:54,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:54,723 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:54,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821654995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:54,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:54,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-12 15:27:54,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430739139] [2021-06-12 15:27:54,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:27:54,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:54,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:27:54,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:27:54,724 INFO L87 Difference]: Start difference. First operand 3203 states and 8918 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:55,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:55,218 INFO L93 Difference]: Finished difference Result 4421 states and 11557 transitions. [2021-06-12 15:27:55,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:27:55,218 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-12 15:27:55,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:55,222 INFO L225 Difference]: With dead ends: 4421 [2021-06-12 15:27:55,222 INFO L226 Difference]: Without dead ends: 4151 [2021-06-12 15:27:55,222 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 477.6ms TimeCoverageRelationStatistics Valid=693, Invalid=2063, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 15:27:55,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-06-12 15:27:55,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3278. [2021-06-12 15:27:55,252 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) [2021-06-12 15:27:55,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 9143 transitions. [2021-06-12 15:27:55,256 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 9143 transitions. Word has length 115 [2021-06-12 15:27:55,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:55,256 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 9143 transitions. [2021-06-12 15:27:55,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:55,256 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 9143 transitions. [2021-06-12 15:27:55,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:27:55,258 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:55,258 INFO L472 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] [2021-06-12 15:27:55,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:55,461 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:55,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:55,461 INFO L82 PathProgramCache]: Analyzing trace with hash -329153762, now seen corresponding path program 141 times [2021-06-12 15:27:55,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:55,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296352846] [2021-06-12 15:27:55,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:55,627 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:55,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:55,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296352846] [2021-06-12 15:27:55,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296352846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:55,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215637091] [2021-06-12 15:27:55,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:55,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 15:27:55,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:55,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:27:55,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:55,828 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:55,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215637091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:55,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:55,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-12 15:27:55,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344931183] [2021-06-12 15:27:55,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:27:55,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:55,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:27:55,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:27:55,829 INFO L87 Difference]: Start difference. First operand 3278 states and 9143 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:56,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:56,435 INFO L93 Difference]: Finished difference Result 4446 states and 11682 transitions. [2021-06-12 15:27:56,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:27:56,435 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 [2021-06-12 15:27:56,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:56,439 INFO L225 Difference]: With dead ends: 4446 [2021-06-12 15:27:56,439 INFO L226 Difference]: Without dead ends: 4176 [2021-06-12 15:27:56,440 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 596.2ms TimeCoverageRelationStatistics Valid=721, Invalid=2249, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 15:27:56,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-12 15:27:56,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3353. [2021-06-12 15:27:56,474 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) [2021-06-12 15:27:56,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9368 transitions. [2021-06-12 15:27:56,478 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9368 transitions. Word has length 115 [2021-06-12 15:27:56,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:56,478 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9368 transitions. [2021-06-12 15:27:56,478 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) [2021-06-12 15:27:56,478 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9368 transitions. [2021-06-12 15:27:56,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:27:56,480 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:56,481 INFO L472 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] [2021-06-12 15:27:56,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-12 15:27:56,685 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:56,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:56,685 INFO L82 PathProgramCache]: Analyzing trace with hash -414188500, now seen corresponding path program 142 times [2021-06-12 15:27:56,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:56,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519459238] [2021-06-12 15:27:56,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:56,845 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:56,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:56,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519459238] [2021-06-12 15:27:56,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519459238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:56,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272438138] [2021-06-12 15:27:56,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:56,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:27:56,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:56,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:27:56,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:57,024 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:57,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272438138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:57,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:57,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-12 15:27:57,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738010147] [2021-06-12 15:27:57,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:27:57,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:57,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:27:57,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:27:57,025 INFO L87 Difference]: Start difference. First operand 3353 states and 9368 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:57,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:57,516 INFO L93 Difference]: Finished difference Result 4471 states and 11807 transitions. [2021-06-12 15:27:57,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:27:57,516 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-12 15:27:57,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:57,520 INFO L225 Difference]: With dead ends: 4471 [2021-06-12 15:27:57,520 INFO L226 Difference]: Without dead ends: 4201 [2021-06-12 15:27:57,521 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 488.8ms TimeCoverageRelationStatistics Valid=779, Invalid=2191, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 15:27:57,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-06-12 15:27:57,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 3428. [2021-06-12 15:27:57,553 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) [2021-06-12 15:27:57,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9593 transitions. [2021-06-12 15:27:57,557 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9593 transitions. Word has length 115 [2021-06-12 15:27:57,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:57,558 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9593 transitions. [2021-06-12 15:27:57,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:57,558 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9593 transitions. [2021-06-12 15:27:57,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:27:57,560 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:57,560 INFO L472 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] [2021-06-12 15:27:57,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:57,761 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:57,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:57,761 INFO L82 PathProgramCache]: Analyzing trace with hash -482339556, now seen corresponding path program 143 times [2021-06-12 15:27:57,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:57,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542792927] [2021-06-12 15:27:57,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:57,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:57,907 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:57,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:57,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542792927] [2021-06-12 15:27:57,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542792927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:57,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056929528] [2021-06-12 15:27:57,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:57,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 15:27:57,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:57,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:27:57,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:58,095 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:58,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056929528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:58,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:58,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-12 15:27:58,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285997984] [2021-06-12 15:27:58,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:27:58,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:58,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:27:58,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:27:58,096 INFO L87 Difference]: Start difference. First operand 3428 states and 9593 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:58,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:58,742 INFO L93 Difference]: Finished difference Result 4496 states and 11932 transitions. [2021-06-12 15:27:58,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:27:58,743 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 [2021-06-12 15:27:58,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:58,747 INFO L225 Difference]: With dead ends: 4496 [2021-06-12 15:27:58,747 INFO L226 Difference]: Without dead ends: 4226 [2021-06-12 15:27:58,747 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 601.0ms TimeCoverageRelationStatistics Valid=809, Invalid=2383, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 15:27:58,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-12 15:27:58,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3503. [2021-06-12 15:27:58,780 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) [2021-06-12 15:27:58,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9818 transitions. [2021-06-12 15:27:58,784 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9818 transitions. Word has length 115 [2021-06-12 15:27:58,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:58,784 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9818 transitions. [2021-06-12 15:27:58,784 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) [2021-06-12 15:27:58,784 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9818 transitions. [2021-06-12 15:27:58,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:27:58,786 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:58,786 INFO L472 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] [2021-06-12 15:27:58,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:58,987 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:27:58,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:27:58,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1779308630, now seen corresponding path program 144 times [2021-06-12 15:27:58,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:27:58,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058791647] [2021-06-12 15:27:58,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:27:58,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:27:59,130 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:59,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:27:59,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058791647] [2021-06-12 15:27:59,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058791647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:59,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588249623] [2021-06-12 15:27:59,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:27:59,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 15:27:59,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:27:59,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:27:59,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:27:59,326 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:27:59,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588249623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:27:59,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:27:59,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-12 15:27:59,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053863165] [2021-06-12 15:27:59,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:27:59,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:27:59,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:27:59,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:27:59,327 INFO L87 Difference]: Start difference. First operand 3503 states and 9818 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:59,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:27:59,859 INFO L93 Difference]: Finished difference Result 4566 states and 12177 transitions. [2021-06-12 15:27:59,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:27:59,860 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-12 15:27:59,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:27:59,864 INFO L225 Difference]: With dead ends: 4566 [2021-06-12 15:27:59,864 INFO L226 Difference]: Without dead ends: 4296 [2021-06-12 15:27:59,865 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 505.6ms TimeCoverageRelationStatistics Valid=881, Invalid=2311, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 15:27:59,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2021-06-12 15:27:59,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 3578. [2021-06-12 15:27:59,900 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) [2021-06-12 15:27:59,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 10058 transitions. [2021-06-12 15:27:59,924 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 10058 transitions. Word has length 115 [2021-06-12 15:27:59,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:27:59,924 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 10058 transitions. [2021-06-12 15:27:59,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:27:59,924 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 10058 transitions. [2021-06-12 15:27:59,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:27:59,927 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:27:59,927 INFO L472 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] [2021-06-12 15:28:00,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:00,127 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:00,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:00,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1349555046, now seen corresponding path program 145 times [2021-06-12 15:28:00,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:00,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793957798] [2021-06-12 15:28:00,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:00,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:00,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793957798] [2021-06-12 15:28:00,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793957798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:00,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156961759] [2021-06-12 15:28:00,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:00,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:28:00,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:00,463 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:00,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156961759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:00,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:00,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-12 15:28:00,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182832297] [2021-06-12 15:28:00,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:28:00,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:00,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:28:00,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:28:00,464 INFO L87 Difference]: Start difference. First operand 3578 states and 10058 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:01,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:01,211 INFO L93 Difference]: Finished difference Result 5144 states and 13803 transitions. [2021-06-12 15:28:01,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:28:01,211 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 [2021-06-12 15:28:01,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:01,217 INFO L225 Difference]: With dead ends: 5144 [2021-06-12 15:28:01,217 INFO L226 Difference]: Without dead ends: 4521 [2021-06-12 15:28:01,218 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 671.7ms TimeCoverageRelationStatistics Valid=934, Invalid=2726, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 15:28:01,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2021-06-12 15:28:01,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 3653. [2021-06-12 15:28:01,249 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) [2021-06-12 15:28:01,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10288 transitions. [2021-06-12 15:28:01,253 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10288 transitions. Word has length 115 [2021-06-12 15:28:01,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:01,253 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10288 transitions. [2021-06-12 15:28:01,253 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) [2021-06-12 15:28:01,253 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10288 transitions. [2021-06-12 15:28:01,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:28:01,256 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:01,256 INFO L472 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] [2021-06-12 15:28:01,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:01,456 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:01,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:01,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1407289176, now seen corresponding path program 146 times [2021-06-12 15:28:01,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:01,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249469420] [2021-06-12 15:28:01,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:01,597 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:01,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:01,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249469420] [2021-06-12 15:28:01,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249469420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:01,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896056513] [2021-06-12 15:28:01,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:01,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:01,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:01,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:28:01,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:01,786 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:01,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896056513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:01,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:01,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-12 15:28:01,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112057006] [2021-06-12 15:28:01,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 15:28:01,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:01,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 15:28:01,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-12 15:28:01,787 INFO L87 Difference]: Start difference. First operand 3653 states and 10288 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:02,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:02,353 INFO L93 Difference]: Finished difference Result 5348 states and 14471 transitions. [2021-06-12 15:28:02,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:28:02,353 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-12 15:28:02,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:02,358 INFO L225 Difference]: With dead ends: 5348 [2021-06-12 15:28:02,358 INFO L226 Difference]: Without dead ends: 5078 [2021-06-12 15:28:02,358 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 518.9ms TimeCoverageRelationStatistics Valid=1000, Invalid=2422, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 15:28:02,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5078 states. [2021-06-12 15:28:02,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5078 to 3833. [2021-06-12 15:28:02,396 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) [2021-06-12 15:28:02,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 10847 transitions. [2021-06-12 15:28:02,400 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 10847 transitions. Word has length 115 [2021-06-12 15:28:02,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:02,400 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 10847 transitions. [2021-06-12 15:28:02,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:02,401 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 10847 transitions. [2021-06-12 15:28:02,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-12 15:28:02,403 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:02,403 INFO L472 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] [2021-06-12 15:28:02,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-06-12 15:28:02,604 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:02,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:02,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1384945926, now seen corresponding path program 147 times [2021-06-12 15:28:02,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:02,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585423456] [2021-06-12 15:28:02,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:02,743 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:02,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:02,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585423456] [2021-06-12 15:28:02,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585423456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:02,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29085671] [2021-06-12 15:28:02,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 15:28:02,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 15:28:02,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:02,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 15:28:02,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:02,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29085671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:02,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:02,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-12 15:28:02,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357763936] [2021-06-12 15:28:02,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:28:02,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:02,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:28:02,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:28:02,935 INFO L87 Difference]: Start difference. First operand 3833 states and 10847 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) [2021-06-12 15:28:03,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:03,638 INFO L93 Difference]: Finished difference Result 4810 states and 13121 transitions. [2021-06-12 15:28:03,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:28:03,638 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 [2021-06-12 15:28:03,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:03,642 INFO L225 Difference]: With dead ends: 4810 [2021-06-12 15:28:03,642 INFO L226 Difference]: Without dead ends: 4321 [2021-06-12 15:28:03,643 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 670.7ms TimeCoverageRelationStatistics Valid=1036, Invalid=2624, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 15:28:03,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4321 states. [2021-06-12 15:28:03,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4321 to 3778. [2021-06-12 15:28:03,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3778 states, 3777 states have (on average 2.8284352660841936) internal successors, (10683), 3777 states have internal predecessors, (10683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:03,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3778 states to 3778 states and 10683 transitions. [2021-06-12 15:28:03,678 INFO L78 Accepts]: Start accepts. Automaton has 3778 states and 10683 transitions. Word has length 115 [2021-06-12 15:28:03,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:03,678 INFO L482 AbstractCegarLoop]: Abstraction has 3778 states and 10683 transitions. [2021-06-12 15:28:03,678 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) [2021-06-12 15:28:03,678 INFO L276 IsEmpty]: Start isEmpty. Operand 3778 states and 10683 transitions. [2021-06-12 15:28:03,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:28:03,681 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:03,681 INFO L472 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] [2021-06-12 15:28:03,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-12 15:28:03,882 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:03,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:03,882 INFO L82 PathProgramCache]: Analyzing trace with hash -736595598, now seen corresponding path program 148 times [2021-06-12 15:28:03,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:03,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801460343] [2021-06-12 15:28:03,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:03,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:04,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:04,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801460343] [2021-06-12 15:28:04,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801460343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:04,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624225014] [2021-06-12 15:28:04,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:04,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:28:04,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:04,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:28:04,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:04,331 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:04,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624225014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:04,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:04,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-06-12 15:28:04,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497267258] [2021-06-12 15:28:04,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:28:04,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:04,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:28:04,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:28:04,332 INFO L87 Difference]: Start difference. First operand 3778 states and 10683 transitions. Second operand has 26 states, 26 states have (on average 5.6923076923076925) internal successors, (148), 26 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:04,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:04,735 INFO L93 Difference]: Finished difference Result 4868 states and 13183 transitions. [2021-06-12 15:28:04,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:28:04,736 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.6923076923076925) internal successors, (148), 26 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-12 15:28:04,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:04,740 INFO L225 Difference]: With dead ends: 4868 [2021-06-12 15:28:04,740 INFO L226 Difference]: Without dead ends: 4534 [2021-06-12 15:28:04,741 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 474.0ms TimeCoverageRelationStatistics Valid=645, Invalid=1805, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 15:28:04,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4534 states. [2021-06-12 15:28:04,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4534 to 3863. [2021-06-12 15:28:04,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3863 states, 3862 states have (on average 2.810201967892284) internal successors, (10853), 3862 states have internal predecessors, (10853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:04,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3863 states to 3863 states and 10853 transitions. [2021-06-12 15:28:04,795 INFO L78 Accepts]: Start accepts. Automaton has 3863 states and 10853 transitions. Word has length 120 [2021-06-12 15:28:04,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:04,795 INFO L482 AbstractCegarLoop]: Abstraction has 3863 states and 10853 transitions. [2021-06-12 15:28:04,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.6923076923076925) internal successors, (148), 26 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:04,796 INFO L276 IsEmpty]: Start isEmpty. Operand 3863 states and 10853 transitions. [2021-06-12 15:28:04,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:28:04,798 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:04,798 INFO L472 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] [2021-06-12 15:28:04,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-12 15:28:04,999 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:04,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:04,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1812195050, now seen corresponding path program 149 times [2021-06-12 15:28:04,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:04,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740420154] [2021-06-12 15:28:04,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:05,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:05,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740420154] [2021-06-12 15:28:05,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740420154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:05,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579399094] [2021-06-12 15:28:05,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:05,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 15:28:05,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:05,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:28:05,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:05,393 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:05,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579399094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:05,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:05,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-12 15:28:05,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035003000] [2021-06-12 15:28:05,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:28:05,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:05,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:28:05,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:28:05,394 INFO L87 Difference]: Start difference. First operand 3863 states and 10853 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 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) [2021-06-12 15:28:05,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:05,733 INFO L93 Difference]: Finished difference Result 5561 states and 14377 transitions. [2021-06-12 15:28:05,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 15:28:05,733 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 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 120 [2021-06-12 15:28:05,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:05,738 INFO L225 Difference]: With dead ends: 5561 [2021-06-12 15:28:05,738 INFO L226 Difference]: Without dead ends: 5291 [2021-06-12 15:28:05,739 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 398.6ms TimeCoverageRelationStatistics Valid=512, Invalid=1380, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 15:28:05,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5291 states. [2021-06-12 15:28:05,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5291 to 3878. [2021-06-12 15:28:05,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:05,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-12 15:28:05,778 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-12 15:28:05,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:05,778 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-12 15:28:05,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 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) [2021-06-12 15:28:05,779 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-12 15:28:05,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:28:05,781 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:05,781 INFO L472 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] [2021-06-12 15:28:05,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-12 15:28:05,982 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:05,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:05,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1564387846, now seen corresponding path program 150 times [2021-06-12 15:28:05,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:05,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087195013] [2021-06-12 15:28:05,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:05,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:06,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:06,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087195013] [2021-06-12 15:28:06,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087195013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:06,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084022544] [2021-06-12 15:28:06,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:06,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 15:28:06,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:06,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:28:06,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:06,398 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:06,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084022544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:06,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:06,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-12 15:28:06,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435280336] [2021-06-12 15:28:06,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:28:06,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:06,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:28:06,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:28:06,399 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 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) [2021-06-12 15:28:06,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:06,818 INFO L93 Difference]: Finished difference Result 5446 states and 14147 transitions. [2021-06-12 15:28:06,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:28:06,818 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 [2021-06-12 15:28:06,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:06,823 INFO L225 Difference]: With dead ends: 5446 [2021-06-12 15:28:06,823 INFO L226 Difference]: Without dead ends: 5176 [2021-06-12 15:28:06,823 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 473.9ms TimeCoverageRelationStatistics Valid=575, Invalid=1681, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 15:28:06,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-06-12 15:28:06,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 3878. [2021-06-12 15:28:06,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:06,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-12 15:28:06,865 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-12 15:28:06,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:06,865 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-12 15:28:06,865 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) [2021-06-12 15:28:06,866 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-12 15:28:06,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:28:06,868 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:06,868 INFO L472 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] [2021-06-12 15:28:07,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-12 15:28:07,069 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:07,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:07,069 INFO L82 PathProgramCache]: Analyzing trace with hash -212302956, now seen corresponding path program 151 times [2021-06-12 15:28:07,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:07,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528932224] [2021-06-12 15:28:07,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:07,278 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:07,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:07,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528932224] [2021-06-12 15:28:07,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528932224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:07,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772624726] [2021-06-12 15:28:07,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:07,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:07,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:28:07,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:07,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772624726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:07,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:07,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-12 15:28:07,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16787288] [2021-06-12 15:28:07,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:28:07,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:07,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:28:07,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:28:07,469 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 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) [2021-06-12 15:28:07,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:07,826 INFO L93 Difference]: Finished difference Result 5421 states and 14097 transitions. [2021-06-12 15:28:07,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 15:28:07,827 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 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 120 [2021-06-12 15:28:07,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:07,832 INFO L225 Difference]: With dead ends: 5421 [2021-06-12 15:28:07,832 INFO L226 Difference]: Without dead ends: 5151 [2021-06-12 15:28:07,832 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 401.5ms TimeCoverageRelationStatistics Valid=519, Invalid=1551, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 15:28:07,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2021-06-12 15:28:07,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 3878. [2021-06-12 15:28:07,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:07,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-12 15:28:07,873 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-12 15:28:07,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:07,873 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-12 15:28:07,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 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) [2021-06-12 15:28:07,873 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-12 15:28:07,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:28:07,876 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:07,876 INFO L472 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] [2021-06-12 15:28:08,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-12 15:28:08,076 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:08,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:08,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1887338628, now seen corresponding path program 152 times [2021-06-12 15:28:08,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:08,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345822266] [2021-06-12 15:28:08,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:08,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:08,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:08,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345822266] [2021-06-12 15:28:08,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345822266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:08,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608512991] [2021-06-12 15:28:08,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:08,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:08,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:08,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:28:08,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:08,524 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:08,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608512991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:08,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:08,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-12 15:28:08,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998370036] [2021-06-12 15:28:08,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:28:08,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:08,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:28:08,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:28:08,525 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 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) [2021-06-12 15:28:08,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:08,976 INFO L93 Difference]: Finished difference Result 5371 states and 13997 transitions. [2021-06-12 15:28:08,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:28:08,976 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 [2021-06-12 15:28:08,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:08,982 INFO L225 Difference]: With dead ends: 5371 [2021-06-12 15:28:08,982 INFO L226 Difference]: Without dead ends: 5101 [2021-06-12 15:28:08,983 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 488.9ms TimeCoverageRelationStatistics Valid=590, Invalid=1860, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 15:28:08,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5101 states. [2021-06-12 15:28:09,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5101 to 3878. [2021-06-12 15:28:09,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:09,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-12 15:28:09,031 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-12 15:28:09,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:09,031 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-12 15:28:09,031 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) [2021-06-12 15:28:09,031 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-12 15:28:09,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:28:09,034 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:09,034 INFO L472 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] [2021-06-12 15:28:09,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:09,235 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:09,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:09,235 INFO L82 PathProgramCache]: Analyzing trace with hash -897428590, now seen corresponding path program 153 times [2021-06-12 15:28:09,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:09,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790780371] [2021-06-12 15:28:09,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:09,409 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:09,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:09,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790780371] [2021-06-12 15:28:09,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790780371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:09,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624414522] [2021-06-12 15:28:09,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:09,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 15:28:09,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:09,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:28:09,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:09,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624414522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:09,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:09,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-12 15:28:09,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416885118] [2021-06-12 15:28:09,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:28:09,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:09,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:28:09,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:28:09,606 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 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) [2021-06-12 15:28:10,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:10,018 INFO L93 Difference]: Finished difference Result 5321 states and 13897 transitions. [2021-06-12 15:28:10,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:28:10,018 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 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 120 [2021-06-12 15:28:10,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:10,023 INFO L225 Difference]: With dead ends: 5321 [2021-06-12 15:28:10,024 INFO L226 Difference]: Without dead ends: 5051 [2021-06-12 15:28:10,024 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 423.6ms TimeCoverageRelationStatistics Valid=542, Invalid=1714, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 15:28:10,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-06-12 15:28:10,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 3878. [2021-06-12 15:28:10,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:10,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-12 15:28:10,066 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-12 15:28:10,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:10,066 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-12 15:28:10,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 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) [2021-06-12 15:28:10,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-12 15:28:10,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:28:10,070 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:10,070 INFO L472 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] [2021-06-12 15:28:10,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:10,272 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:10,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:10,272 INFO L82 PathProgramCache]: Analyzing trace with hash -257770366, now seen corresponding path program 154 times [2021-06-12 15:28:10,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:10,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083888752] [2021-06-12 15:28:10,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:10,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:10,453 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:10,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:10,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083888752] [2021-06-12 15:28:10,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083888752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:10,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277458191] [2021-06-12 15:28:10,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:10,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:28:10,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:10,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:28:10,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:10,669 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:10,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277458191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:10,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:10,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-12 15:28:10,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917908874] [2021-06-12 15:28:10,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:28:10,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:10,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:28:10,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:28:10,670 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 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) [2021-06-12 15:28:11,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:11,174 INFO L93 Difference]: Finished difference Result 5271 states and 13797 transitions. [2021-06-12 15:28:11,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:28:11,174 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 [2021-06-12 15:28:11,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:11,179 INFO L225 Difference]: With dead ends: 5271 [2021-06-12 15:28:11,179 INFO L226 Difference]: Without dead ends: 5001 [2021-06-12 15:28:11,180 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 525.4ms TimeCoverageRelationStatistics Valid=621, Invalid=2031, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 15:28:11,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5001 states. [2021-06-12 15:28:11,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5001 to 3878. [2021-06-12 15:28:11,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:11,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-12 15:28:11,235 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-12 15:28:11,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:11,235 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-12 15:28:11,235 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) [2021-06-12 15:28:11,235 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-12 15:28:11,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:28:11,238 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:11,238 INFO L472 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] [2021-06-12 15:28:11,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:11,438 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:11,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:11,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1032689392, now seen corresponding path program 155 times [2021-06-12 15:28:11,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:11,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327676322] [2021-06-12 15:28:11,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:11,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:11,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:11,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327676322] [2021-06-12 15:28:11,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327676322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:11,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166171585] [2021-06-12 15:28:11,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:11,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 15:28:11,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:11,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:28:11,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:11,794 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:11,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166171585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:11,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:11,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-12 15:28:11,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617049215] [2021-06-12 15:28:11,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:28:11,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:11,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:28:11,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:28:11,795 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 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) [2021-06-12 15:28:12,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:12,264 INFO L93 Difference]: Finished difference Result 5221 states and 13697 transitions. [2021-06-12 15:28:12,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:28:12,264 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 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 120 [2021-06-12 15:28:12,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:12,269 INFO L225 Difference]: With dead ends: 5221 [2021-06-12 15:28:12,269 INFO L226 Difference]: Without dead ends: 4951 [2021-06-12 15:28:12,270 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 433.7ms TimeCoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 15:28:12,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4951 states. [2021-06-12 15:28:12,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4951 to 3878. [2021-06-12 15:28:12,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:12,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-12 15:28:12,312 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-12 15:28:12,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:12,313 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-12 15:28:12,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 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) [2021-06-12 15:28:12,313 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-12 15:28:12,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:28:12,315 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:12,316 INFO L472 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] [2021-06-12 15:28:12,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:12,516 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:12,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:12,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1486602752, now seen corresponding path program 156 times [2021-06-12 15:28:12,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:12,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924454191] [2021-06-12 15:28:12,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:12,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:12,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:12,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924454191] [2021-06-12 15:28:12,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924454191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:12,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483104978] [2021-06-12 15:28:12,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:12,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 15:28:12,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:12,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:28:12,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:12,930 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:12,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483104978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:12,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:12,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-12 15:28:12,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336526304] [2021-06-12 15:28:12,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:28:12,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:12,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:28:12,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:28:12,931 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 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) [2021-06-12 15:28:13,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:13,502 INFO L93 Difference]: Finished difference Result 5171 states and 13597 transitions. [2021-06-12 15:28:13,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:28:13,502 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 [2021-06-12 15:28:13,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:13,507 INFO L225 Difference]: With dead ends: 5171 [2021-06-12 15:28:13,507 INFO L226 Difference]: Without dead ends: 4901 [2021-06-12 15:28:13,507 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 556.2ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 15:28:13,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4901 states. [2021-06-12 15:28:13,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4901 to 3878. [2021-06-12 15:28:13,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:13,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-12 15:28:13,549 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-12 15:28:13,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:13,549 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-12 15:28:13,549 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) [2021-06-12 15:28:13,549 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-12 15:28:13,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:28:13,552 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:13,552 INFO L472 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] [2021-06-12 15:28:13,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:13,753 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:13,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:13,753 INFO L82 PathProgramCache]: Analyzing trace with hash -608590834, now seen corresponding path program 157 times [2021-06-12 15:28:13,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:13,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398137897] [2021-06-12 15:28:13,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:13,914 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:13,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:13,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398137897] [2021-06-12 15:28:13,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398137897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:13,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132103624] [2021-06-12 15:28:13,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:13,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:28:13,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:14,098 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:14,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132103624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:14,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:14,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-12 15:28:14,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469398713] [2021-06-12 15:28:14,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:28:14,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:14,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:28:14,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:28:14,099 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 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) [2021-06-12 15:28:14,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:14,621 INFO L93 Difference]: Finished difference Result 5121 states and 13497 transitions. [2021-06-12 15:28:14,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:28:14,622 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 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 120 [2021-06-12 15:28:14,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:14,626 INFO L225 Difference]: With dead ends: 5121 [2021-06-12 15:28:14,626 INFO L226 Difference]: Without dead ends: 4851 [2021-06-12 15:28:14,626 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 490.1ms TimeCoverageRelationStatistics Valid=636, Invalid=2016, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 15:28:14,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4851 states. [2021-06-12 15:28:14,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4851 to 3878. [2021-06-12 15:28:14,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:14,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-12 15:28:14,663 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-12 15:28:14,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:14,663 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-12 15:28:14,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 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) [2021-06-12 15:28:14,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-12 15:28:14,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:28:14,666 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:14,666 INFO L472 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] [2021-06-12 15:28:14,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:14,866 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:14,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:14,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1508645634, now seen corresponding path program 158 times [2021-06-12 15:28:14,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:14,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929051242] [2021-06-12 15:28:14,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:14,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:15,034 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:15,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:15,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929051242] [2021-06-12 15:28:15,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929051242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:15,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375025327] [2021-06-12 15:28:15,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:15,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:15,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:15,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:28:15,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:15,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375025327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:15,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:15,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-12 15:28:15,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647029382] [2021-06-12 15:28:15,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:28:15,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:15,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:28:15,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:28:15,231 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 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) [2021-06-12 15:28:15,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:15,852 INFO L93 Difference]: Finished difference Result 5071 states and 13397 transitions. [2021-06-12 15:28:15,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:28:15,853 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 [2021-06-12 15:28:15,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:15,858 INFO L225 Difference]: With dead ends: 5071 [2021-06-12 15:28:15,858 INFO L226 Difference]: Without dead ends: 4801 [2021-06-12 15:28:15,858 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 589.5ms TimeCoverageRelationStatistics Valid=731, Invalid=2349, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 15:28:15,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4801 states. [2021-06-12 15:28:15,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4801 to 3878. [2021-06-12 15:28:15,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:15,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-12 15:28:15,897 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-12 15:28:15,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:15,898 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-12 15:28:15,898 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) [2021-06-12 15:28:15,898 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-12 15:28:15,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:28:15,900 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:15,901 INFO L472 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] [2021-06-12 15:28:16,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:16,105 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:16,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:16,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1937709940, now seen corresponding path program 159 times [2021-06-12 15:28:16,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:16,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139380787] [2021-06-12 15:28:16,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:16,295 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:16,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:16,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139380787] [2021-06-12 15:28:16,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139380787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:16,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662279044] [2021-06-12 15:28:16,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:16,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 15:28:16,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:16,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:28:16,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:16,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662279044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:16,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:16,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-12 15:28:16,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900837403] [2021-06-12 15:28:16,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:28:16,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:16,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:28:16,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:28:16,496 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 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) [2021-06-12 15:28:17,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:17,006 INFO L93 Difference]: Finished difference Result 5021 states and 13297 transitions. [2021-06-12 15:28:17,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:28:17,006 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 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 120 [2021-06-12 15:28:17,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:17,011 INFO L225 Difference]: With dead ends: 5021 [2021-06-12 15:28:17,011 INFO L226 Difference]: Without dead ends: 4751 [2021-06-12 15:28:17,012 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 505.9ms TimeCoverageRelationStatistics Valid=707, Invalid=2155, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 15:28:17,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4751 states. [2021-06-12 15:28:17,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4751 to 3878. [2021-06-12 15:28:17,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:17,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-12 15:28:17,055 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-12 15:28:17,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:17,055 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-12 15:28:17,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 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) [2021-06-12 15:28:17,056 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-12 15:28:17,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:28:17,058 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:17,059 INFO L472 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] [2021-06-12 15:28:17,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-12 15:28:17,259 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:17,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:17,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1671074172, now seen corresponding path program 160 times [2021-06-12 15:28:17,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:17,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760078688] [2021-06-12 15:28:17,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:17,418 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:17,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:17,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760078688] [2021-06-12 15:28:17,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760078688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:17,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143827893] [2021-06-12 15:28:17,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:17,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:28:17,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:17,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:28:17,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:17,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143827893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:17,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:17,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-12 15:28:17,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894179458] [2021-06-12 15:28:17,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:28:17,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:17,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:28:17,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:28:17,614 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 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) [2021-06-12 15:28:18,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:18,286 INFO L93 Difference]: Finished difference Result 4971 states and 13197 transitions. [2021-06-12 15:28:18,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:28:18,286 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 [2021-06-12 15:28:18,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:18,291 INFO L225 Difference]: With dead ends: 4971 [2021-06-12 15:28:18,291 INFO L226 Difference]: Without dead ends: 4701 [2021-06-12 15:28:18,291 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 632.9ms TimeCoverageRelationStatistics Valid=810, Invalid=2496, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 15:28:18,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4701 states. [2021-06-12 15:28:18,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4701 to 3878. [2021-06-12 15:28:18,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:18,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-12 15:28:18,329 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-12 15:28:18,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:18,329 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-12 15:28:18,329 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) [2021-06-12 15:28:18,329 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-12 15:28:18,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:28:18,332 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:18,332 INFO L472 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] [2021-06-12 15:28:18,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-12 15:28:18,532 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:18,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:18,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1586039434, now seen corresponding path program 161 times [2021-06-12 15:28:18,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:18,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990873318] [2021-06-12 15:28:18,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:18,686 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:18,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:18,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990873318] [2021-06-12 15:28:18,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990873318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:18,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81719329] [2021-06-12 15:28:18,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:18,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 15:28:18,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:18,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:28:18,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:18,871 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:18,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81719329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:18,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:18,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-12 15:28:18,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089253158] [2021-06-12 15:28:18,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:28:18,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:18,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:28:18,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:28:18,872 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 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) [2021-06-12 15:28:19,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:19,428 INFO L93 Difference]: Finished difference Result 4921 states and 13097 transitions. [2021-06-12 15:28:19,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:28:19,428 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 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 120 [2021-06-12 15:28:19,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:19,432 INFO L225 Difference]: With dead ends: 4921 [2021-06-12 15:28:19,432 INFO L226 Difference]: Without dead ends: 4651 [2021-06-12 15:28:19,432 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 514.6ms TimeCoverageRelationStatistics Valid=794, Invalid=2286, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 15:28:19,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4651 states. [2021-06-12 15:28:19,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 3878. [2021-06-12 15:28:19,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:19,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-12 15:28:19,468 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-12 15:28:19,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:19,468 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-12 15:28:19,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 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) [2021-06-12 15:28:19,468 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-12 15:28:19,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:28:19,471 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:19,471 INFO L472 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] [2021-06-12 15:28:19,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-12 15:28:19,671 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:19,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:19,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1517888378, now seen corresponding path program 162 times [2021-06-12 15:28:19,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:19,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079432550] [2021-06-12 15:28:19,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:19,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:19,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:19,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079432550] [2021-06-12 15:28:19,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079432550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:19,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209312974] [2021-06-12 15:28:19,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:19,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 15:28:19,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:19,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:28:19,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:20,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209312974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:20,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:20,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-12 15:28:20,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330125307] [2021-06-12 15:28:20,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:28:20,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:20,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:28:20,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:28:20,036 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 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) [2021-06-12 15:28:20,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:20,746 INFO L93 Difference]: Finished difference Result 4871 states and 12997 transitions. [2021-06-12 15:28:20,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:28:20,746 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 [2021-06-12 15:28:20,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:20,751 INFO L225 Difference]: With dead ends: 4871 [2021-06-12 15:28:20,751 INFO L226 Difference]: Without dead ends: 4601 [2021-06-12 15:28:20,751 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 669.4ms TimeCoverageRelationStatistics Valid=905, Invalid=2635, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 15:28:20,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2021-06-12 15:28:20,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 3878. [2021-06-12 15:28:20,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:20,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-12 15:28:20,789 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-12 15:28:20,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:20,790 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-12 15:28:20,790 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) [2021-06-12 15:28:20,790 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-12 15:28:20,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:28:20,809 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:20,809 INFO L472 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] [2021-06-12 15:28:21,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:21,010 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:21,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:21,010 INFO L82 PathProgramCache]: Analyzing trace with hash 220919304, now seen corresponding path program 163 times [2021-06-12 15:28:21,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:21,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306842182] [2021-06-12 15:28:21,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:21,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:21,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306842182] [2021-06-12 15:28:21,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306842182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:21,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2224598] [2021-06-12 15:28:21,181 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:21,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:21,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:28:21,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:21,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2224598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:21,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:21,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-12 15:28:21,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755738137] [2021-06-12 15:28:21,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:28:21,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:21,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:28:21,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:28:21,368 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 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) [2021-06-12 15:28:21,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:21,937 INFO L93 Difference]: Finished difference Result 4821 states and 12897 transitions. [2021-06-12 15:28:21,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:28:21,938 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 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 120 [2021-06-12 15:28:21,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:21,942 INFO L225 Difference]: With dead ends: 4821 [2021-06-12 15:28:21,943 INFO L226 Difference]: Without dead ends: 4551 [2021-06-12 15:28:21,943 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 565.3ms TimeCoverageRelationStatistics Valid=897, Invalid=2409, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 15:28:21,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4551 states. [2021-06-12 15:28:21,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4551 to 3878. [2021-06-12 15:28:21,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:21,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-12 15:28:21,981 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-12 15:28:21,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:21,981 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-12 15:28:21,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 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) [2021-06-12 15:28:21,981 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-12 15:28:21,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:28:21,983 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:21,984 INFO L472 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] [2021-06-12 15:28:22,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-12 15:28:22,184 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:22,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:22,184 INFO L82 PathProgramCache]: Analyzing trace with hash 650672888, now seen corresponding path program 164 times [2021-06-12 15:28:22,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:22,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434836952] [2021-06-12 15:28:22,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:22,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:22,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434836952] [2021-06-12 15:28:22,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434836952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:22,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222391834] [2021-06-12 15:28:22,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 15:28:22,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:22,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:22,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:28:22,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:22,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222391834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:22,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:22,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-12 15:28:22,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583072157] [2021-06-12 15:28:22,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:28:22,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:22,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:28:22,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:28:22,550 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 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) [2021-06-12 15:28:23,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:23,344 INFO L93 Difference]: Finished difference Result 5279 states and 14163 transitions. [2021-06-12 15:28:23,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:28:23,345 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 [2021-06-12 15:28:23,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:23,349 INFO L225 Difference]: With dead ends: 5279 [2021-06-12 15:28:23,349 INFO L226 Difference]: Without dead ends: 4656 [2021-06-12 15:28:23,350 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 735.5ms TimeCoverageRelationStatistics Valid=1037, Invalid=2995, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 15:28:23,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4656 states. [2021-06-12 15:28:23,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4656 to 3788. [2021-06-12 15:28:23,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 2.81172432004225) internal successors, (10648), 3787 states have internal predecessors, (10648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:23,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 10648 transitions. [2021-06-12 15:28:23,391 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 10648 transitions. Word has length 120 [2021-06-12 15:28:23,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:23,391 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 10648 transitions. [2021-06-12 15:28:23,391 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) [2021-06-12 15:28:23,391 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 10648 transitions. [2021-06-12 15:28:23,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:28:23,394 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:23,394 INFO L472 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] [2021-06-12 15:28:23,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:23,594 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:23,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:23,595 INFO L82 PathProgramCache]: Analyzing trace with hash 592938758, now seen corresponding path program 165 times [2021-06-12 15:28:23,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:23,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709646043] [2021-06-12 15:28:23,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:23,746 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:23,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:23,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709646043] [2021-06-12 15:28:23,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709646043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:23,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760244551] [2021-06-12 15:28:23,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:23,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 15:28:23,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:23,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:28:23,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:23,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760244551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:23,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:23,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-12 15:28:23,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169965608] [2021-06-12 15:28:23,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:28:23,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:23,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:28:23,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:28:23,933 INFO L87 Difference]: Start difference. First operand 3788 states and 10648 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 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) [2021-06-12 15:28:24,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:24,548 INFO L93 Difference]: Finished difference Result 5508 states and 14881 transitions. [2021-06-12 15:28:24,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:28:24,548 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 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 120 [2021-06-12 15:28:24,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:24,553 INFO L225 Difference]: With dead ends: 5508 [2021-06-12 15:28:24,553 INFO L226 Difference]: Without dead ends: 5238 [2021-06-12 15:28:24,553 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 578.5ms TimeCoverageRelationStatistics Valid=1017, Invalid=2523, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 15:28:24,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5238 states. [2021-06-12 15:28:24,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5238 to 3968. [2021-06-12 15:28:24,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 3967 states have (on average 2.825056717922864) internal successors, (11207), 3967 states have internal predecessors, (11207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:24,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 11207 transitions. [2021-06-12 15:28:24,595 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 11207 transitions. Word has length 120 [2021-06-12 15:28:24,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:24,595 INFO L482 AbstractCegarLoop]: Abstraction has 3968 states and 11207 transitions. [2021-06-12 15:28:24,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 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) [2021-06-12 15:28:24,595 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 11207 transitions. [2021-06-12 15:28:24,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 15:28:24,598 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:24,598 INFO L472 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] [2021-06-12 15:28:24,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:24,799 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:24,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:24,799 INFO L82 PathProgramCache]: Analyzing trace with hash 615282008, now seen corresponding path program 166 times [2021-06-12 15:28:24,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:24,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038698071] [2021-06-12 15:28:24,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:24,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:24,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038698071] [2021-06-12 15:28:24,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038698071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:24,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135769274] [2021-06-12 15:28:24,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:25,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:28:25,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:25,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 15:28:25,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:25,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135769274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:25,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:25,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-12 15:28:25,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519829172] [2021-06-12 15:28:25,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:28:25,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:25,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:28:25,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:28:25,159 INFO L87 Difference]: Start difference. First operand 3968 states and 11207 transitions. Second operand has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:26,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:26,000 INFO L93 Difference]: Finished difference Result 5451 states and 14741 transitions. [2021-06-12 15:28:26,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 15:28:26,001 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have 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 [2021-06-12 15:28:26,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:26,005 INFO L225 Difference]: With dead ends: 5451 [2021-06-12 15:28:26,005 INFO L226 Difference]: Without dead ends: 4876 [2021-06-12 15:28:26,005 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 802.2ms TimeCoverageRelationStatistics Valid=1212, Invalid=3344, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 15:28:26,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4876 states. [2021-06-12 15:28:26,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4876 to 4003. [2021-06-12 15:28:26,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:26,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-12 15:28:26,046 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 120 [2021-06-12 15:28:26,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:26,046 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-12 15:28:26,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:26,046 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-12 15:28:26,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:28:26,049 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:26,049 INFO L472 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] [2021-06-12 15:28:26,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:26,249 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:26,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:26,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1413473561, now seen corresponding path program 167 times [2021-06-12 15:28:26,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:26,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926708535] [2021-06-12 15:28:26,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:26,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:26,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:26,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926708535] [2021-06-12 15:28:26,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926708535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:26,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407499716] [2021-06-12 15:28:26,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:26,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 15:28:26,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:26,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:28:26,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:26,671 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:26,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407499716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:26,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:26,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 15:28:26,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991677994] [2021-06-12 15:28:26,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:28:26,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:26,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:28:26,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:28:26,672 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:27,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:27,040 INFO L93 Difference]: Finished difference Result 5246 states and 13897 transitions. [2021-06-12 15:28:27,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 15:28:27,041 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-12 15:28:27,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:27,046 INFO L225 Difference]: With dead ends: 5246 [2021-06-12 15:28:27,046 INFO L226 Difference]: Without dead ends: 4976 [2021-06-12 15:28:27,046 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 451.7ms TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 15:28:27,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2021-06-12 15:28:27,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 4003. [2021-06-12 15:28:27,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:27,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-12 15:28:27,086 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-12 15:28:27,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:27,086 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-12 15:28:27,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:27,086 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-12 15:28:27,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:28:27,089 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:27,089 INFO L472 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] [2021-06-12 15:28:27,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-06-12 15:28:27,290 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:27,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:27,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1963109335, now seen corresponding path program 168 times [2021-06-12 15:28:27,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:27,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932120470] [2021-06-12 15:28:27,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:27,529 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:27,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:27,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932120470] [2021-06-12 15:28:27,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932120470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:27,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320752328] [2021-06-12 15:28:27,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 15:28:27,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 15:28:27,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:27,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:28:27,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:27,754 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:27,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320752328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:27,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:27,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-12 15:28:27,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860730189] [2021-06-12 15:28:27,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:28:27,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:27,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:28:27,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:28:27,755 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 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) [2021-06-12 15:28:28,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:28,171 INFO L93 Difference]: Finished difference Result 5641 states and 14687 transitions. [2021-06-12 15:28:28,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:28:28,171 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 [2021-06-12 15:28:28,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:28,176 INFO L225 Difference]: With dead ends: 5641 [2021-06-12 15:28:28,176 INFO L226 Difference]: Without dead ends: 5371 [2021-06-12 15:28:28,177 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 523.5ms TimeCoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 15:28:28,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5371 states. [2021-06-12 15:28:28,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5371 to 4003. [2021-06-12 15:28:28,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:28,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-12 15:28:28,218 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-12 15:28:28,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:28,218 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-12 15:28:28,218 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) [2021-06-12 15:28:28,218 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-12 15:28:28,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:28:28,221 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:28,221 INFO L472 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] [2021-06-12 15:28:28,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:28,421 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:28,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:28,421 INFO L82 PathProgramCache]: Analyzing trace with hash 186418533, now seen corresponding path program 169 times [2021-06-12 15:28:28,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:28,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87438521] [2021-06-12 15:28:28,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:28,631 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:28,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:28,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87438521] [2021-06-12 15:28:28,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87438521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:28,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244108899] [2021-06-12 15:28:28,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:28,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:28,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:28:28,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:28,839 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:28,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244108899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:28,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:28,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 15:28:28,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234879683] [2021-06-12 15:28:28,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:28:28,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:28,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:28:28,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:28:28,840 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:29,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:29,306 INFO L93 Difference]: Finished difference Result 5596 states and 14597 transitions. [2021-06-12 15:28:29,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:28:29,306 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-12 15:28:29,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:29,311 INFO L225 Difference]: With dead ends: 5596 [2021-06-12 15:28:29,311 INFO L226 Difference]: Without dead ends: 5326 [2021-06-12 15:28:29,312 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 495.8ms TimeCoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 15:28:29,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2021-06-12 15:28:29,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 4003. [2021-06-12 15:28:29,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:29,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-12 15:28:29,354 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-12 15:28:29,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:29,355 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-12 15:28:29,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:29,355 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-12 15:28:29,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:28:29,358 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:29,358 INFO L472 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] [2021-06-12 15:28:29,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-12 15:28:29,558 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:29,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:29,559 INFO L82 PathProgramCache]: Analyzing trace with hash -2008907179, now seen corresponding path program 170 times [2021-06-12 15:28:29,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:29,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571998971] [2021-06-12 15:28:29,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:29,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:29,757 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:29,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:29,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571998971] [2021-06-12 15:28:29,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571998971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:29,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674718367] [2021-06-12 15:28:29,757 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 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 [2021-06-12 15:28:29,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:29,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:29,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:28:29,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:29,966 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:29,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674718367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:29,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:29,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-12 15:28:29,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191567953] [2021-06-12 15:28:29,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:28:29,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:29,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:28:29,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:28:29,967 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 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) [2021-06-12 15:28:30,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:30,454 INFO L93 Difference]: Finished difference Result 5546 states and 14497 transitions. [2021-06-12 15:28:30,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:28:30,454 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 [2021-06-12 15:28:30,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:30,460 INFO L225 Difference]: With dead ends: 5546 [2021-06-12 15:28:30,460 INFO L226 Difference]: Without dead ends: 5276 [2021-06-12 15:28:30,460 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 526.1ms TimeCoverageRelationStatistics Valid=653, Invalid=2103, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 15:28:30,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5276 states. [2021-06-12 15:28:30,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5276 to 4003. [2021-06-12 15:28:30,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:30,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-12 15:28:30,513 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-12 15:28:30,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:30,513 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-12 15:28:30,514 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) [2021-06-12 15:28:30,514 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-12 15:28:30,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:28:30,516 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:30,517 INFO L472 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] [2021-06-12 15:28:30,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-12 15:28:30,717 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:30,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:30,717 INFO L82 PathProgramCache]: Analyzing trace with hash -498707101, now seen corresponding path program 171 times [2021-06-12 15:28:30,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:30,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966839209] [2021-06-12 15:28:30,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:30,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:30,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966839209] [2021-06-12 15:28:30,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966839209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:30,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705973714] [2021-06-12 15:28:30,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:30,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 15:28:30,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:30,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:28:30,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:31,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705973714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:31,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:31,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 15:28:31,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516150893] [2021-06-12 15:28:31,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:28:31,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:31,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:28:31,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:28:31,107 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:31,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:31,588 INFO L93 Difference]: Finished difference Result 5496 states and 14397 transitions. [2021-06-12 15:28:31,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:28:31,588 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-12 15:28:31,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:31,593 INFO L225 Difference]: With dead ends: 5496 [2021-06-12 15:28:31,594 INFO L226 Difference]: Without dead ends: 5226 [2021-06-12 15:28:31,594 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 489.8ms TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 15:28:31,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-06-12 15:28:31,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 4003. [2021-06-12 15:28:31,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:31,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-12 15:28:31,635 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-12 15:28:31,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:31,635 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-12 15:28:31,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:31,635 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-12 15:28:31,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:28:31,638 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:31,638 INFO L472 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] [2021-06-12 15:28:31,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-12 15:28:31,838 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:31,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:31,839 INFO L82 PathProgramCache]: Analyzing trace with hash 140951123, now seen corresponding path program 172 times [2021-06-12 15:28:31,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:31,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181541732] [2021-06-12 15:28:31,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:32,027 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:32,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:32,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181541732] [2021-06-12 15:28:32,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181541732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:32,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205270684] [2021-06-12 15:28:32,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:32,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:28:32,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:32,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:28:32,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:32,253 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:32,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205270684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:32,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:32,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-12 15:28:32,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595652216] [2021-06-12 15:28:32,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:28:32,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:32,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:28:32,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:28:32,254 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 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) [2021-06-12 15:28:32,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:32,801 INFO L93 Difference]: Finished difference Result 5446 states and 14297 transitions. [2021-06-12 15:28:32,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:28:32,801 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 [2021-06-12 15:28:32,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:32,806 INFO L225 Difference]: With dead ends: 5446 [2021-06-12 15:28:32,806 INFO L226 Difference]: Without dead ends: 5176 [2021-06-12 15:28:32,807 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 554.0ms TimeCoverageRelationStatistics Valid=691, Invalid=2279, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 15:28:32,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-06-12 15:28:32,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 4003. [2021-06-12 15:28:32,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:32,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-12 15:28:32,851 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-12 15:28:32,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:32,851 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-12 15:28:32,851 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) [2021-06-12 15:28:32,851 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-12 15:28:32,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:28:32,854 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:32,854 INFO L472 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] [2021-06-12 15:28:33,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-06-12 15:28:33,064 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:33,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:33,064 INFO L82 PathProgramCache]: Analyzing trace with hash -633967903, now seen corresponding path program 173 times [2021-06-12 15:28:33,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:33,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488471091] [2021-06-12 15:28:33,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:33,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:33,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:33,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488471091] [2021-06-12 15:28:33,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488471091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:33,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063987822] [2021-06-12 15:28:33,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:33,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 15:28:33,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:33,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:28:33,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:33,437 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:33,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063987822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:33,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:33,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 15:28:33,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673590493] [2021-06-12 15:28:33,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:28:33,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:33,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:28:33,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:28:33,438 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:33,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:33,927 INFO L93 Difference]: Finished difference Result 5396 states and 14197 transitions. [2021-06-12 15:28:33,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:28:33,928 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-12 15:28:33,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:33,933 INFO L225 Difference]: With dead ends: 5396 [2021-06-12 15:28:33,933 INFO L226 Difference]: Without dead ends: 5126 [2021-06-12 15:28:33,933 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 499.7ms TimeCoverageRelationStatistics Valid=719, Invalid=2251, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 15:28:33,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2021-06-12 15:28:33,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 4003. [2021-06-12 15:28:33,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:33,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-12 15:28:33,973 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-12 15:28:33,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:33,973 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-12 15:28:33,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:33,973 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-12 15:28:33,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:28:33,976 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:33,976 INFO L472 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] [2021-06-12 15:28:34,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:34,176 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:34,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:34,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1087881263, now seen corresponding path program 174 times [2021-06-12 15:28:34,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:34,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893582937] [2021-06-12 15:28:34,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:34,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:34,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893582937] [2021-06-12 15:28:34,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893582937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:34,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247326280] [2021-06-12 15:28:34,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:34,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 15:28:34,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:34,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:28:34,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:34,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247326280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:34,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:34,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-12 15:28:34,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906228447] [2021-06-12 15:28:34,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:28:34,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:34,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:28:34,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:28:34,564 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 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) [2021-06-12 15:28:35,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:35,147 INFO L93 Difference]: Finished difference Result 5346 states and 14097 transitions. [2021-06-12 15:28:35,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:28:35,147 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 [2021-06-12 15:28:35,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:35,152 INFO L225 Difference]: With dead ends: 5346 [2021-06-12 15:28:35,152 INFO L226 Difference]: Without dead ends: 5076 [2021-06-12 15:28:35,152 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 579.1ms TimeCoverageRelationStatistics Valid=745, Invalid=2447, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 15:28:35,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5076 states. [2021-06-12 15:28:35,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5076 to 4003. [2021-06-12 15:28:35,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:35,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-12 15:28:35,203 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-12 15:28:35,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:35,203 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-12 15:28:35,203 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) [2021-06-12 15:28:35,203 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-12 15:28:35,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:28:35,206 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:35,206 INFO L472 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] [2021-06-12 15:28:35,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-12 15:28:35,407 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:35,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:35,407 INFO L82 PathProgramCache]: Analyzing trace with hash -209869345, now seen corresponding path program 175 times [2021-06-12 15:28:35,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:35,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182424222] [2021-06-12 15:28:35,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:35,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:35,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:35,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182424222] [2021-06-12 15:28:35,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182424222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:35,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60088001] [2021-06-12 15:28:35,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 15:28:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:35,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:28:35,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:35,776 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:35,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60088001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:35,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:35,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 15:28:35,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182719404] [2021-06-12 15:28:35,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:28:35,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:35,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:28:35,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:28:35,777 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:36,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:36,322 INFO L93 Difference]: Finished difference Result 5296 states and 13997 transitions. [2021-06-12 15:28:36,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:28:36,322 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-12 15:28:36,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:36,327 INFO L225 Difference]: With dead ends: 5296 [2021-06-12 15:28:36,327 INFO L226 Difference]: Without dead ends: 5026 [2021-06-12 15:28:36,328 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 523.6ms TimeCoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 15:28:36,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5026 states. [2021-06-12 15:28:36,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5026 to 4003. [2021-06-12 15:28:36,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:36,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-12 15:28:36,370 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-12 15:28:36,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:36,370 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-12 15:28:36,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:36,370 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-12 15:28:36,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:28:36,373 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:36,373 INFO L472 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] [2021-06-12 15:28:36,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:36,574 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:36,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:36,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1109924145, now seen corresponding path program 176 times [2021-06-12 15:28:36,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:36,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760930602] [2021-06-12 15:28:36,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:36,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:36,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760930602] [2021-06-12 15:28:36,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760930602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:36,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296322760] [2021-06-12 15:28:36,745 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 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 [2021-06-12 15:28:36,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:36,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:36,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:28:36,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:36,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296322760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:36,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:36,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-12 15:28:36,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834528854] [2021-06-12 15:28:36,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:28:36,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:36,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:28:36,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:28:36,985 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 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) [2021-06-12 15:28:37,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:37,622 INFO L93 Difference]: Finished difference Result 5246 states and 13897 transitions. [2021-06-12 15:28:37,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:28:37,623 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 [2021-06-12 15:28:37,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:37,628 INFO L225 Difference]: With dead ends: 5246 [2021-06-12 15:28:37,628 INFO L226 Difference]: Without dead ends: 4976 [2021-06-12 15:28:37,628 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 625.9ms TimeCoverageRelationStatistics Valid=815, Invalid=2607, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 15:28:37,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2021-06-12 15:28:37,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 4003. [2021-06-12 15:28:37,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:37,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-12 15:28:37,670 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-12 15:28:37,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:37,671 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-12 15:28:37,671 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) [2021-06-12 15:28:37,671 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-12 15:28:37,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:28:37,674 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:37,674 INFO L472 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] [2021-06-12 15:28:37,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:37,874 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:37,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:37,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1538988451, now seen corresponding path program 177 times [2021-06-12 15:28:37,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:37,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538937635] [2021-06-12 15:28:37,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:38,046 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:38,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:38,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538937635] [2021-06-12 15:28:38,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538937635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:38,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289440484] [2021-06-12 15:28:38,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:38,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 15:28:38,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:38,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:28:38,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:38,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289440484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:38,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:38,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 15:28:38,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563933562] [2021-06-12 15:28:38,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:28:38,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:38,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:28:38,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:28:38,270 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:38,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:38,857 INFO L93 Difference]: Finished difference Result 5196 states and 13797 transitions. [2021-06-12 15:28:38,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:28:38,857 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-12 15:28:38,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:38,862 INFO L225 Difference]: With dead ends: 5196 [2021-06-12 15:28:38,863 INFO L226 Difference]: Without dead ends: 4926 [2021-06-12 15:28:38,863 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 567.9ms TimeCoverageRelationStatistics Valid=871, Invalid=2551, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 15:28:38,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4926 states. [2021-06-12 15:28:38,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4926 to 4003. [2021-06-12 15:28:38,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:38,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-12 15:28:38,904 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-12 15:28:38,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:38,904 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-12 15:28:38,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:38,904 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-12 15:28:38,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:28:38,907 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:38,907 INFO L472 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] [2021-06-12 15:28:39,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:39,107 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:39,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:39,108 INFO L82 PathProgramCache]: Analyzing trace with hash 2069795661, now seen corresponding path program 178 times [2021-06-12 15:28:39,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:39,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232715563] [2021-06-12 15:28:39,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:39,266 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:39,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:39,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232715563] [2021-06-12 15:28:39,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232715563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:39,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032107789] [2021-06-12 15:28:39,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 15:28:39,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:28:39,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:39,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:28:39,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:39,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032107789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:39,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:39,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-12 15:28:39,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884160032] [2021-06-12 15:28:39,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:28:39,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:39,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:28:39,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:28:39,466 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 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) [2021-06-12 15:28:40,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:40,153 INFO L93 Difference]: Finished difference Result 5146 states and 13697 transitions. [2021-06-12 15:28:40,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:28:40,153 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 [2021-06-12 15:28:40,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:40,157 INFO L225 Difference]: With dead ends: 5146 [2021-06-12 15:28:40,157 INFO L226 Difference]: Without dead ends: 4876 [2021-06-12 15:28:40,158 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 636.6ms TimeCoverageRelationStatistics Valid=901, Invalid=2759, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 15:28:40,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4876 states. [2021-06-12 15:28:40,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4876 to 4003. [2021-06-12 15:28:40,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:40,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-12 15:28:40,198 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-12 15:28:40,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:40,198 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-12 15:28:40,198 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) [2021-06-12 15:28:40,198 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-12 15:28:40,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:28:40,201 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:40,201 INFO L472 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] [2021-06-12 15:28:40,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:40,402 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:40,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:40,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1984760923, now seen corresponding path program 179 times [2021-06-12 15:28:40,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:40,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863731552] [2021-06-12 15:28:40,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:40,567 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:40,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:40,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863731552] [2021-06-12 15:28:40,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863731552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:40,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030210983] [2021-06-12 15:28:40,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 15:28:40,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 15:28:40,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:40,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:28:40,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:40,758 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:40,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030210983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:40,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:40,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 15:28:40,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57133919] [2021-06-12 15:28:40,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:28:40,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:40,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:28:40,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:28:40,759 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:41,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:41,350 INFO L93 Difference]: Finished difference Result 5096 states and 13597 transitions. [2021-06-12 15:28:41,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:28:41,351 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-12 15:28:41,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:41,355 INFO L225 Difference]: With dead ends: 5096 [2021-06-12 15:28:41,356 INFO L226 Difference]: Without dead ends: 4826 [2021-06-12 15:28:41,356 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 568.8ms TimeCoverageRelationStatistics Valid=971, Invalid=2689, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 15:28:41,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2021-06-12 15:28:41,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 4003. [2021-06-12 15:28:41,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:41,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-12 15:28:41,399 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-12 15:28:41,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:41,399 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-12 15:28:41,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:41,399 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-12 15:28:41,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:28:41,402 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:41,402 INFO L472 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] [2021-06-12 15:28:41,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable187 [2021-06-12 15:28:41,617 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:41,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:41,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1916609867, now seen corresponding path program 180 times [2021-06-12 15:28:41,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:41,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781329610] [2021-06-12 15:28:41,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:41,804 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:41,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:41,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781329610] [2021-06-12 15:28:41,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781329610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:41,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527363584] [2021-06-12 15:28:41,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:41,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 15:28:41,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:41,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:28:41,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:42,014 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:42,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527363584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:42,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:42,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-12 15:28:42,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786545335] [2021-06-12 15:28:42,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:28:42,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:42,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:28:42,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:28:42,015 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 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) [2021-06-12 15:28:42,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:42,757 INFO L93 Difference]: Finished difference Result 5046 states and 13497 transitions. [2021-06-12 15:28:42,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:28:42,757 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 [2021-06-12 15:28:42,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:42,762 INFO L225 Difference]: With dead ends: 5046 [2021-06-12 15:28:42,762 INFO L226 Difference]: Without dead ends: 4776 [2021-06-12 15:28:42,762 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 722.6ms TimeCoverageRelationStatistics Valid=1003, Invalid=2903, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 15:28:42,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4776 states. [2021-06-12 15:28:42,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4776 to 4003. [2021-06-12 15:28:42,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:42,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-12 15:28:42,805 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-12 15:28:42,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:42,806 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-12 15:28:42,806 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) [2021-06-12 15:28:42,806 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-12 15:28:42,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:28:42,809 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:42,809 INFO L472 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] [2021-06-12 15:28:43,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-12 15:28:43,026 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:43,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:43,026 INFO L82 PathProgramCache]: Analyzing trace with hash 619640793, now seen corresponding path program 181 times [2021-06-12 15:28:43,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:43,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147557913] [2021-06-12 15:28:43,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:43,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:43,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147557913] [2021-06-12 15:28:43,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147557913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:43,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027335296] [2021-06-12 15:28:43,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:43,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:43,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:28:43,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:43,391 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:43,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027335296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:43,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:43,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 15:28:43,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995374256] [2021-06-12 15:28:43,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:28:43,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:43,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:28:43,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:28:43,392 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:44,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:44,015 INFO L93 Difference]: Finished difference Result 4996 states and 13397 transitions. [2021-06-12 15:28:44,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:28:44,016 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-12 15:28:44,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:44,020 INFO L225 Difference]: With dead ends: 4996 [2021-06-12 15:28:44,020 INFO L226 Difference]: Without dead ends: 4726 [2021-06-12 15:28:44,021 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 586.8ms TimeCoverageRelationStatistics Valid=1087, Invalid=2819, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 15:28:44,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4726 states. [2021-06-12 15:28:44,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4726 to 4003. [2021-06-12 15:28:44,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:44,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-12 15:28:44,063 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-12 15:28:44,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:44,063 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-12 15:28:44,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:44,064 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-12 15:28:44,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:28:44,067 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:44,067 INFO L472 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] [2021-06-12 15:28:44,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-12 15:28:44,267 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:44,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:44,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1049394377, now seen corresponding path program 182 times [2021-06-12 15:28:44,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:44,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245383583] [2021-06-12 15:28:44,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:44,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:44,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:44,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245383583] [2021-06-12 15:28:44,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245383583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:44,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115002059] [2021-06-12 15:28:44,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:44,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:44,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:44,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:28:44,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:44,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115002059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:44,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:44,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-12 15:28:44,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828438834] [2021-06-12 15:28:44,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:28:44,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:44,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:28:44,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:28:44,634 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 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) [2021-06-12 15:28:45,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:45,410 INFO L93 Difference]: Finished difference Result 5006 states and 13447 transitions. [2021-06-12 15:28:45,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:28:45,410 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 [2021-06-12 15:28:45,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:45,415 INFO L225 Difference]: With dead ends: 5006 [2021-06-12 15:28:45,415 INFO L226 Difference]: Without dead ends: 4736 [2021-06-12 15:28:45,416 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 739.4ms TimeCoverageRelationStatistics Valid=1121, Invalid=3039, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 15:28:45,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4736 states. [2021-06-12 15:28:45,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4736 to 4003. [2021-06-12 15:28:45,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8205897051474262) internal successors, (11288), 4002 states have internal predecessors, (11288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:45,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11288 transitions. [2021-06-12 15:28:45,454 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11288 transitions. Word has length 125 [2021-06-12 15:28:45,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:45,455 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11288 transitions. [2021-06-12 15:28:45,455 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) [2021-06-12 15:28:45,455 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11288 transitions. [2021-06-12 15:28:45,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:28:45,458 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:45,458 INFO L472 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] [2021-06-12 15:28:45,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:45,660 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:45,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:45,660 INFO L82 PathProgramCache]: Analyzing trace with hash 991660247, now seen corresponding path program 183 times [2021-06-12 15:28:45,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:45,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180446691] [2021-06-12 15:28:45,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:45,825 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:45,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:45,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180446691] [2021-06-12 15:28:45,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180446691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:45,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675377541] [2021-06-12 15:28:45,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:45,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 15:28:45,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:45,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:28:45,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:46,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675377541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:46,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:46,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 15:28:46,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904350576] [2021-06-12 15:28:46,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 15:28:46,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:46,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 15:28:46,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-06-12 15:28:46,019 INFO L87 Difference]: Start difference. First operand 4003 states and 11288 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:46,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:46,680 INFO L93 Difference]: Finished difference Result 5748 states and 15571 transitions. [2021-06-12 15:28:46,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:28:46,680 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-12 15:28:46,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:46,685 INFO L225 Difference]: With dead ends: 5748 [2021-06-12 15:28:46,685 INFO L226 Difference]: Without dead ends: 5478 [2021-06-12 15:28:46,685 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 616.2ms TimeCoverageRelationStatistics Valid=1220, Invalid=2940, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 15:28:46,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5478 states. [2021-06-12 15:28:46,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5478 to 4183. [2021-06-12 15:28:46,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4183 states, 4182 states have (on average 2.832855093256815) internal successors, (11847), 4182 states have internal predecessors, (11847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:46,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 11847 transitions. [2021-06-12 15:28:46,730 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 11847 transitions. Word has length 125 [2021-06-12 15:28:46,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:46,730 INFO L482 AbstractCegarLoop]: Abstraction has 4183 states and 11847 transitions. [2021-06-12 15:28:46,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:46,730 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 11847 transitions. [2021-06-12 15:28:46,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-12 15:28:46,733 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:46,733 INFO L472 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] [2021-06-12 15:28:46,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:46,937 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:46,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:46,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1014003497, now seen corresponding path program 184 times [2021-06-12 15:28:46,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:46,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720432327] [2021-06-12 15:28:46,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:47,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:47,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720432327] [2021-06-12 15:28:47,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720432327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:47,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941826803] [2021-06-12 15:28:47,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 15:28:47,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:28:47,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:47,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 15:28:47,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:47,295 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:47,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941826803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:47,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:47,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-12 15:28:47,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529472646] [2021-06-12 15:28:47,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:28:47,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:47,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:28:47,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:28:47,296 INFO L87 Difference]: Start difference. First operand 4183 states and 11847 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) [2021-06-12 15:28:48,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:48,106 INFO L93 Difference]: Finished difference Result 5210 states and 14221 transitions. [2021-06-12 15:28:48,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:28:48,106 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 [2021-06-12 15:28:48,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:48,110 INFO L225 Difference]: With dead ends: 5210 [2021-06-12 15:28:48,110 INFO L226 Difference]: Without dead ends: 4721 [2021-06-12 15:28:48,111 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 758.1ms TimeCoverageRelationStatistics Valid=1258, Invalid=3164, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 15:28:48,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4721 states. [2021-06-12 15:28:48,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4721 to 4128. [2021-06-12 15:28:48,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4128 states, 4127 states have (on average 2.8308698812696873) internal successors, (11683), 4127 states have internal predecessors, (11683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:48,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4128 states to 4128 states and 11683 transitions. [2021-06-12 15:28:48,149 INFO L78 Accepts]: Start accepts. Automaton has 4128 states and 11683 transitions. Word has length 125 [2021-06-12 15:28:48,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:48,149 INFO L482 AbstractCegarLoop]: Abstraction has 4128 states and 11683 transitions. [2021-06-12 15:28:48,149 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) [2021-06-12 15:28:48,149 INFO L276 IsEmpty]: Start isEmpty. Operand 4128 states and 11683 transitions. [2021-06-12 15:28:48,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:28:48,152 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:48,152 INFO L472 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] [2021-06-12 15:28:48,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:48,353 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:48,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:48,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1934097443, now seen corresponding path program 185 times [2021-06-12 15:28:48,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:48,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944610468] [2021-06-12 15:28:48,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:48,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:48,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944610468] [2021-06-12 15:28:48,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944610468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:48,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507092088] [2021-06-12 15:28:48,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:48,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 15:28:48,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:48,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:28:48,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:48,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507092088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:48,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:48,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-12 15:28:48,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105523999] [2021-06-12 15:28:48,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 15:28:48,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:48,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 15:28:48,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2021-06-12 15:28:48,817 INFO L87 Difference]: Start difference. First operand 4128 states and 11683 transitions. Second operand has 28 states, 28 states have (on average 5.642857142857143) internal successors, (158), 28 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:49,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:49,238 INFO L93 Difference]: Finished difference Result 4948 states and 13451 transitions. [2021-06-12 15:28:49,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:28:49,239 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.642857142857143) internal successors, (158), 28 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:28:49,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:49,243 INFO L225 Difference]: With dead ends: 4948 [2021-06-12 15:28:49,244 INFO L226 Difference]: Without dead ends: 4678 [2021-06-12 15:28:49,244 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 497.2ms TimeCoverageRelationStatistics Valid=725, Invalid=1927, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 15:28:49,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4678 states. [2021-06-12 15:28:49,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4678 to 4213. [2021-06-12 15:28:49,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4213 states, 4212 states have (on average 2.8141025641025643) internal successors, (11853), 4212 states have internal predecessors, (11853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:49,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 11853 transitions. [2021-06-12 15:28:49,285 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 11853 transitions. Word has length 130 [2021-06-12 15:28:49,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:49,285 INFO L482 AbstractCegarLoop]: Abstraction has 4213 states and 11853 transitions. [2021-06-12 15:28:49,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.642857142857143) internal successors, (158), 28 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:49,285 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 11853 transitions. [2021-06-12 15:28:49,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:28:49,288 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:49,288 INFO L472 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] [2021-06-12 15:28:49,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:49,489 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:49,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:49,489 INFO L82 PathProgramCache]: Analyzing trace with hash -2037815609, now seen corresponding path program 186 times [2021-06-12 15:28:49,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:49,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753645405] [2021-06-12 15:28:49,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:49,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:49,749 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:49,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:49,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753645405] [2021-06-12 15:28:49,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753645405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:49,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756526203] [2021-06-12 15:28:49,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:49,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 15:28:49,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:49,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:28:49,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:49,979 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:49,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756526203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:49,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:49,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:28:49,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105581335] [2021-06-12 15:28:49,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:28:49,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:49,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:28:49,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:28:49,982 INFO L87 Difference]: Start difference. First operand 4213 states and 11853 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:50,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:50,374 INFO L93 Difference]: Finished difference Result 6061 states and 15677 transitions. [2021-06-12 15:28:50,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 15:28:50,374 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:28:50,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:50,380 INFO L225 Difference]: With dead ends: 6061 [2021-06-12 15:28:50,380 INFO L226 Difference]: Without dead ends: 5791 [2021-06-12 15:28:50,380 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 502.4ms TimeCoverageRelationStatistics Valid=616, Invalid=1640, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 15:28:50,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5791 states. [2021-06-12 15:28:50,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5791 to 4228. [2021-06-12 15:28:50,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:50,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-12 15:28:50,426 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-12 15:28:50,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:50,426 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-12 15:28:50,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:50,426 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-12 15:28:50,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:28:50,429 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:50,429 INFO L472 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] [2021-06-12 15:28:50,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-12 15:28:50,630 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:50,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:50,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1614777271, now seen corresponding path program 187 times [2021-06-12 15:28:50,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:50,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397029802] [2021-06-12 15:28:50,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:50,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:50,859 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:50,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:50,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397029802] [2021-06-12 15:28:50,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397029802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:50,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776764280] [2021-06-12 15:28:50,859 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:50,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:50,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:28:50,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:51,084 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:51,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776764280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:51,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:51,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:28:51,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500031520] [2021-06-12 15:28:51,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:28:51,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:51,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:28:51,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:28:51,086 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:51,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:51,553 INFO L93 Difference]: Finished difference Result 5946 states and 15447 transitions. [2021-06-12 15:28:51,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:28:51,553 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:28:51,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:51,559 INFO L225 Difference]: With dead ends: 5946 [2021-06-12 15:28:51,559 INFO L226 Difference]: Without dead ends: 5676 [2021-06-12 15:28:51,559 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 527.6ms TimeCoverageRelationStatistics Valid=683, Invalid=1969, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 15:28:51,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5676 states. [2021-06-12 15:28:51,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5676 to 4228. [2021-06-12 15:28:51,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:51,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-12 15:28:51,604 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-12 15:28:51,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:51,604 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-12 15:28:51,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:51,604 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-12 15:28:51,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:28:51,607 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:51,607 INFO L472 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] [2021-06-12 15:28:51,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:51,808 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:51,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:51,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1568230341, now seen corresponding path program 188 times [2021-06-12 15:28:51,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:51,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137029204] [2021-06-12 15:28:51,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:52,035 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:52,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:52,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137029204] [2021-06-12 15:28:52,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137029204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:52,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434031024] [2021-06-12 15:28:52,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:52,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:52,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:52,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:28:52,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:52,250 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:52,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434031024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:52,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:52,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:28:52,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848460646] [2021-06-12 15:28:52,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:28:52,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:52,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:28:52,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:28:52,251 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:52,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:52,698 INFO L93 Difference]: Finished difference Result 5921 states and 15397 transitions. [2021-06-12 15:28:52,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 15:28:52,698 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:28:52,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:52,704 INFO L225 Difference]: With dead ends: 5921 [2021-06-12 15:28:52,705 INFO L226 Difference]: Without dead ends: 5651 [2021-06-12 15:28:52,705 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 489.7ms TimeCoverageRelationStatistics Valid=621, Invalid=1829, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 15:28:52,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5651 states. [2021-06-12 15:28:52,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5651 to 4228. [2021-06-12 15:28:52,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:52,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-12 15:28:52,760 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-12 15:28:52,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:52,760 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-12 15:28:52,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:52,760 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-12 15:28:52,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:28:52,763 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:52,763 INFO L472 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] [2021-06-12 15:28:52,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:52,964 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:52,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:52,964 INFO L82 PathProgramCache]: Analyzing trace with hash 649845941, now seen corresponding path program 189 times [2021-06-12 15:28:52,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:52,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809052794] [2021-06-12 15:28:52,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:53,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:53,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809052794] [2021-06-12 15:28:53,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809052794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:53,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711095078] [2021-06-12 15:28:53,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:53,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 15:28:53,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:53,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:28:53,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:53,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711095078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:53,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:53,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:28:53,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467176411] [2021-06-12 15:28:53,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:28:53,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:53,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:28:53,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:28:53,413 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:53,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:53,919 INFO L93 Difference]: Finished difference Result 5871 states and 15297 transitions. [2021-06-12 15:28:53,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:28:53,919 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:28:53,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:53,925 INFO L225 Difference]: With dead ends: 5871 [2021-06-12 15:28:53,925 INFO L226 Difference]: Without dead ends: 5601 [2021-06-12 15:28:53,925 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 563.4ms TimeCoverageRelationStatistics Valid=696, Invalid=2166, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 15:28:53,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5601 states. [2021-06-12 15:28:53,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5601 to 4228. [2021-06-12 15:28:53,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:53,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-12 15:28:53,969 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-12 15:28:53,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:53,969 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-12 15:28:53,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:53,969 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-12 15:28:53,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:28:53,972 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:53,972 INFO L472 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] [2021-06-12 15:28:54,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:54,173 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:54,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:54,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1126844861, now seen corresponding path program 190 times [2021-06-12 15:28:54,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:54,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956234017] [2021-06-12 15:28:54,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:54,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:54,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:54,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956234017] [2021-06-12 15:28:54,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956234017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:54,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984806841] [2021-06-12 15:28:54,394 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:54,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:28:54,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:54,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:28:54,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:54,600 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:54,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984806841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:54,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:54,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:28:54,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383685348] [2021-06-12 15:28:54,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:28:54,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:54,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:28:54,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:28:54,601 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:55,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:55,070 INFO L93 Difference]: Finished difference Result 5821 states and 15197 transitions. [2021-06-12 15:28:55,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 15:28:55,071 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:28:55,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:55,076 INFO L225 Difference]: With dead ends: 5821 [2021-06-12 15:28:55,076 INFO L226 Difference]: Without dead ends: 5551 [2021-06-12 15:28:55,077 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 512.2ms TimeCoverageRelationStatistics Valid=642, Invalid=2010, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 15:28:55,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5551 states. [2021-06-12 15:28:55,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5551 to 4228. [2021-06-12 15:28:55,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:55,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-12 15:28:55,121 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-12 15:28:55,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:55,121 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-12 15:28:55,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:55,121 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-12 15:28:55,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:28:55,124 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:55,124 INFO L472 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] [2021-06-12 15:28:55,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:55,324 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:55,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:55,325 INFO L82 PathProgramCache]: Analyzing trace with hash 972796723, now seen corresponding path program 191 times [2021-06-12 15:28:55,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:55,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551693323] [2021-06-12 15:28:55,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:55,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:55,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551693323] [2021-06-12 15:28:55,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551693323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:55,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015965872] [2021-06-12 15:28:55,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:55,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 15:28:55,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:55,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:28:55,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:55,764 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:55,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015965872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:55,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:55,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:28:55,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824320516] [2021-06-12 15:28:55,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:28:55,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:55,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:28:55,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:28:55,765 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:56,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:56,350 INFO L93 Difference]: Finished difference Result 5771 states and 15097 transitions. [2021-06-12 15:28:56,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:28:56,351 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:28:56,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:56,357 INFO L225 Difference]: With dead ends: 5771 [2021-06-12 15:28:56,357 INFO L226 Difference]: Without dead ends: 5501 [2021-06-12 15:28:56,357 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 625.8ms TimeCoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 15:28:56,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5501 states. [2021-06-12 15:28:56,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5501 to 4228. [2021-06-12 15:28:56,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:56,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-12 15:28:56,405 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-12 15:28:56,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:56,405 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-12 15:28:56,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:56,405 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-12 15:28:56,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:28:56,408 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:56,409 INFO L472 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] [2021-06-12 15:28:56,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-12 15:28:56,611 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:56,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:56,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1811970495, now seen corresponding path program 192 times [2021-06-12 15:28:56,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:56,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991579714] [2021-06-12 15:28:56,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:56,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:56,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:56,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991579714] [2021-06-12 15:28:56,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991579714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:56,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249354846] [2021-06-12 15:28:56,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:56,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 15:28:56,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:56,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:28:56,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:57,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249354846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:57,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:57,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:28:57,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512866305] [2021-06-12 15:28:57,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:28:57,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:57,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:28:57,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:28:57,049 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:57,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:57,595 INFO L93 Difference]: Finished difference Result 5721 states and 14997 transitions. [2021-06-12 15:28:57,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 15:28:57,595 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:28:57,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:57,599 INFO L225 Difference]: With dead ends: 5721 [2021-06-12 15:28:57,599 INFO L226 Difference]: Without dead ends: 5451 [2021-06-12 15:28:57,600 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 530.0ms TimeCoverageRelationStatistics Valid=679, Invalid=2183, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 15:28:57,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5451 states. [2021-06-12 15:28:57,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5451 to 4228. [2021-06-12 15:28:57,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:57,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-12 15:28:57,648 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-12 15:28:57,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:57,649 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-12 15:28:57,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:57,649 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-12 15:28:57,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:28:57,652 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:57,652 INFO L472 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] [2021-06-12 15:28:57,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-12 15:28:57,865 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:57,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:57,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1172312271, now seen corresponding path program 193 times [2021-06-12 15:28:57,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:57,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463172189] [2021-06-12 15:28:57,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:57,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:58,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:58,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463172189] [2021-06-12 15:28:58,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463172189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:58,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249437056] [2021-06-12 15:28:58,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:58,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:58,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:28:58,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:58,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249437056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:58,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:58,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:28:58,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88755018] [2021-06-12 15:28:58,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:28:58,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:58,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:28:58,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:28:58,294 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:58,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:28:58,948 INFO L93 Difference]: Finished difference Result 5671 states and 14897 transitions. [2021-06-12 15:28:58,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 15:28:58,948 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:28:58,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:28:58,954 INFO L225 Difference]: With dead ends: 5671 [2021-06-12 15:28:58,954 INFO L226 Difference]: Without dead ends: 5401 [2021-06-12 15:28:58,955 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 635.3ms TimeCoverageRelationStatistics Valid=770, Invalid=2536, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 15:28:58,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2021-06-12 15:28:58,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 4228. [2021-06-12 15:28:58,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:59,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-12 15:28:59,004 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-12 15:28:59,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:28:59,004 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-12 15:28:59,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:28:59,004 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-12 15:28:59,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:28:59,008 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:28:59,008 INFO L472 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] [2021-06-12 15:28:59,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-12 15:28:59,208 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:28:59,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:28:59,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1947231297, now seen corresponding path program 194 times [2021-06-12 15:28:59,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:28:59,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067032062] [2021-06-12 15:28:59,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:28:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:28:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:59,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:28:59,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067032062] [2021-06-12 15:28:59,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067032062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:59,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47727933] [2021-06-12 15:28:59,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:28:59,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:28:59,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:28:59,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:28:59,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:28:59,599 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:28:59,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47727933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:28:59,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:28:59,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:28:59,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903378039] [2021-06-12 15:28:59,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:28:59,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:28:59,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:28:59,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:28:59,600 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:00,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:00,167 INFO L93 Difference]: Finished difference Result 5621 states and 14797 transitions. [2021-06-12 15:29:00,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:29:00,167 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:29:00,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:00,172 INFO L225 Difference]: With dead ends: 5621 [2021-06-12 15:29:00,172 INFO L226 Difference]: Without dead ends: 5351 [2021-06-12 15:29:00,173 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 522.1ms TimeCoverageRelationStatistics Valid=732, Invalid=2348, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 15:29:00,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2021-06-12 15:29:00,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 4228. [2021-06-12 15:29:00,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:00,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-12 15:29:00,219 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-12 15:29:00,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:00,220 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-12 15:29:00,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:00,220 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-12 15:29:00,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:29:00,223 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:00,223 INFO L472 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] [2021-06-12 15:29:00,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-12 15:29:00,423 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:00,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:00,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1893822639, now seen corresponding path program 195 times [2021-06-12 15:29:00,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:00,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359145604] [2021-06-12 15:29:00,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:00,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:00,617 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:00,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:00,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359145604] [2021-06-12 15:29:00,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359145604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:00,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171436528] [2021-06-12 15:29:00,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:00,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 15:29:00,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:00,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:29:00,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:00,862 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:00,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171436528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:00,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:00,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:29:00,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995802256] [2021-06-12 15:29:00,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:29:00,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:00,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:29:00,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:29:00,863 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:01,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:01,565 INFO L93 Difference]: Finished difference Result 5571 states and 14697 transitions. [2021-06-12 15:29:01,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 15:29:01,565 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:29:01,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:01,571 INFO L225 Difference]: With dead ends: 5571 [2021-06-12 15:29:01,571 INFO L226 Difference]: Without dead ends: 5301 [2021-06-12 15:29:01,571 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 670.9ms TimeCoverageRelationStatistics Valid=831, Invalid=2709, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 15:29:01,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5301 states. [2021-06-12 15:29:01,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5301 to 4228. [2021-06-12 15:29:01,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:01,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-12 15:29:01,615 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-12 15:29:01,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:01,615 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-12 15:29:01,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:01,615 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-12 15:29:01,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:29:01,618 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:01,618 INFO L472 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] [2021-06-12 15:29:01,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:01,819 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:01,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:01,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1523132739, now seen corresponding path program 196 times [2021-06-12 15:29:01,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:01,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511499668] [2021-06-12 15:29:01,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:02,002 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:02,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:02,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511499668] [2021-06-12 15:29:02,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511499668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:02,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835857830] [2021-06-12 15:29:02,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:02,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:29:02,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:02,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:29:02,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:02,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835857830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:02,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:02,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:29:02,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963524431] [2021-06-12 15:29:02,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:29:02,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:02,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:29:02,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:29:02,206 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:02,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:02,826 INFO L93 Difference]: Finished difference Result 5521 states and 14597 transitions. [2021-06-12 15:29:02,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 15:29:02,827 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:29:02,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:02,832 INFO L225 Difference]: With dead ends: 5521 [2021-06-12 15:29:02,832 INFO L226 Difference]: Without dead ends: 5251 [2021-06-12 15:29:02,832 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 573.8ms TimeCoverageRelationStatistics Valid=801, Invalid=2505, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 15:29:02,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2021-06-12 15:29:02,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 4228. [2021-06-12 15:29:02,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:02,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-12 15:29:02,874 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-12 15:29:02,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:02,875 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-12 15:29:02,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:02,875 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-12 15:29:02,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:29:02,878 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:02,878 INFO L472 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] [2021-06-12 15:29:03,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-12 15:29:03,078 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:03,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:03,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1871779757, now seen corresponding path program 197 times [2021-06-12 15:29:03,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:03,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807279533] [2021-06-12 15:29:03,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:03,251 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:03,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:03,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807279533] [2021-06-12 15:29:03,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807279533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:03,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544840259] [2021-06-12 15:29:03,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:03,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 15:29:03,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:03,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:29:03,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:03,518 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:03,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544840259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:03,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:03,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:29:03,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903499873] [2021-06-12 15:29:03,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:29:03,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:03,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:29:03,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:29:03,519 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:04,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:04,325 INFO L93 Difference]: Finished difference Result 5471 states and 14497 transitions. [2021-06-12 15:29:04,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 15:29:04,325 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:29:04,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:04,330 INFO L225 Difference]: With dead ends: 5471 [2021-06-12 15:29:04,330 INFO L226 Difference]: Without dead ends: 5201 [2021-06-12 15:29:04,330 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 739.3ms TimeCoverageRelationStatistics Valid=908, Invalid=2874, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 15:29:04,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5201 states. [2021-06-12 15:29:04,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5201 to 4228. [2021-06-12 15:29:04,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:04,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-12 15:29:04,373 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-12 15:29:04,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:04,373 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-12 15:29:04,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:04,373 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-12 15:29:04,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:29:04,376 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:04,376 INFO L472 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] [2021-06-12 15:29:04,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:04,577 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:04,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:04,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1442715451, now seen corresponding path program 198 times [2021-06-12 15:29:04,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:04,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377388555] [2021-06-12 15:29:04,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:04,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:04,763 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:04,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:04,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377388555] [2021-06-12 15:29:04,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377388555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:04,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760955664] [2021-06-12 15:29:04,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:04,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 15:29:04,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:04,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:29:04,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:04,970 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:04,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760955664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:04,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:04,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:29:04,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5619777] [2021-06-12 15:29:04,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:29:04,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:04,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:29:04,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:29:04,971 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:05,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:05,630 INFO L93 Difference]: Finished difference Result 5421 states and 14397 transitions. [2021-06-12 15:29:05,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 15:29:05,630 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:29:05,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:05,634 INFO L225 Difference]: With dead ends: 5421 [2021-06-12 15:29:05,634 INFO L226 Difference]: Without dead ends: 5151 [2021-06-12 15:29:05,634 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 604.8ms TimeCoverageRelationStatistics Valid=886, Invalid=2654, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 15:29:05,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2021-06-12 15:29:05,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 4228. [2021-06-12 15:29:05,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:05,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-12 15:29:05,674 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-12 15:29:05,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:05,674 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-12 15:29:05,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:05,674 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-12 15:29:05,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:29:05,677 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:05,677 INFO L472 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] [2021-06-12 15:29:05,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-12 15:29:05,878 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:05,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:05,878 INFO L82 PathProgramCache]: Analyzing trace with hash 756532267, now seen corresponding path program 199 times [2021-06-12 15:29:05,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:05,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916526261] [2021-06-12 15:29:05,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:06,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:06,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916526261] [2021-06-12 15:29:06,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916526261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:06,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228243800] [2021-06-12 15:29:06,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:06,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:06,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:29:06,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:06,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228243800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:06,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:06,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:29:06,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631488744] [2021-06-12 15:29:06,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:29:06,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:06,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:29:06,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:29:06,273 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:07,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:07,110 INFO L93 Difference]: Finished difference Result 5371 states and 14297 transitions. [2021-06-12 15:29:07,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 15:29:07,111 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:29:07,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:07,116 INFO L225 Difference]: With dead ends: 5371 [2021-06-12 15:29:07,116 INFO L226 Difference]: Without dead ends: 5101 [2021-06-12 15:29:07,117 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 769.1ms TimeCoverageRelationStatistics Valid=1001, Invalid=3031, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 15:29:07,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5101 states. [2021-06-12 15:29:07,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5101 to 4228. [2021-06-12 15:29:07,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:07,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-12 15:29:07,194 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-12 15:29:07,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:07,194 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-12 15:29:07,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:07,194 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-12 15:29:07,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:29:07,197 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:07,197 INFO L472 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] [2021-06-12 15:29:07,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:07,398 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:07,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:07,398 INFO L82 PathProgramCache]: Analyzing trace with hash 671497529, now seen corresponding path program 200 times [2021-06-12 15:29:07,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:07,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830957646] [2021-06-12 15:29:07,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:07,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:07,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830957646] [2021-06-12 15:29:07,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830957646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:07,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688878714] [2021-06-12 15:29:07,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:07,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:29:07,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:07,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:29:07,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:07,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688878714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:07,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:07,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:29:07,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056436531] [2021-06-12 15:29:07,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:29:07,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:07,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:29:07,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:29:07,778 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:08,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:08,437 INFO L93 Difference]: Finished difference Result 5321 states and 14197 transitions. [2021-06-12 15:29:08,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 15:29:08,437 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:29:08,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:08,442 INFO L225 Difference]: With dead ends: 5321 [2021-06-12 15:29:08,442 INFO L226 Difference]: Without dead ends: 5051 [2021-06-12 15:29:08,442 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 611.6ms TimeCoverageRelationStatistics Valid=987, Invalid=2795, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 15:29:08,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-06-12 15:29:08,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 4228. [2021-06-12 15:29:08,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:08,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-12 15:29:08,486 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-12 15:29:08,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:08,486 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-12 15:29:08,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:08,486 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-12 15:29:08,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:29:08,489 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:08,489 INFO L472 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] [2021-06-12 15:29:08,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:08,689 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:08,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:08,690 INFO L82 PathProgramCache]: Analyzing trace with hash 603346473, now seen corresponding path program 201 times [2021-06-12 15:29:08,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:08,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150897801] [2021-06-12 15:29:08,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:08,889 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:08,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:08,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150897801] [2021-06-12 15:29:08,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150897801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:08,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941251916] [2021-06-12 15:29:08,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:08,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 15:29:08,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:08,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:29:08,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:09,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941251916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:09,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:09,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:29:09,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376866220] [2021-06-12 15:29:09,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:29:09,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:09,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:29:09,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:29:09,123 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:09,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:09,986 INFO L93 Difference]: Finished difference Result 5271 states and 14097 transitions. [2021-06-12 15:29:09,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 15:29:09,986 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:29:09,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:09,991 INFO L225 Difference]: With dead ends: 5271 [2021-06-12 15:29:09,991 INFO L226 Difference]: Without dead ends: 5001 [2021-06-12 15:29:09,992 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 824.9ms TimeCoverageRelationStatistics Valid=1110, Invalid=3180, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 15:29:09,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5001 states. [2021-06-12 15:29:10,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5001 to 4228. [2021-06-12 15:29:10,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:10,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-12 15:29:10,039 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-12 15:29:10,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:10,040 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-12 15:29:10,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:10,040 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-12 15:29:10,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:29:10,043 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:10,043 INFO L472 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] [2021-06-12 15:29:10,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:10,243 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:10,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:10,244 INFO L82 PathProgramCache]: Analyzing trace with hash -693622601, now seen corresponding path program 202 times [2021-06-12 15:29:10,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:10,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505246836] [2021-06-12 15:29:10,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:10,426 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:10,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:10,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505246836] [2021-06-12 15:29:10,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505246836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:10,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212066281] [2021-06-12 15:29:10,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:10,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:29:10,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:10,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:29:10,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:10,638 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:10,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212066281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:10,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:10,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:29:10,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647141723] [2021-06-12 15:29:10,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:29:10,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:10,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:29:10,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:29:10,639 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:11,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:11,301 INFO L93 Difference]: Finished difference Result 5221 states and 13997 transitions. [2021-06-12 15:29:11,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 15:29:11,302 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:29:11,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:11,308 INFO L225 Difference]: With dead ends: 5221 [2021-06-12 15:29:11,308 INFO L226 Difference]: Without dead ends: 4951 [2021-06-12 15:29:11,309 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 645.9ms TimeCoverageRelationStatistics Valid=1104, Invalid=2928, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 15:29:11,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4951 states. [2021-06-12 15:29:11,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4951 to 4228. [2021-06-12 15:29:11,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:11,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-12 15:29:11,356 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-12 15:29:11,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:11,356 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-12 15:29:11,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:11,356 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-12 15:29:11,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:29:11,360 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:11,360 INFO L472 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] [2021-06-12 15:29:11,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-12 15:29:11,560 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:11,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:11,561 INFO L82 PathProgramCache]: Analyzing trace with hash -263869017, now seen corresponding path program 203 times [2021-06-12 15:29:11,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:11,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358704133] [2021-06-12 15:29:11,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:11,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:11,744 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:11,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:11,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358704133] [2021-06-12 15:29:11,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358704133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:11,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579916026] [2021-06-12 15:29:11,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:11,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 15:29:11,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:11,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:29:11,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:11,954 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:11,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579916026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:11,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:11,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:29:11,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613007723] [2021-06-12 15:29:11,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:29:11,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:11,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:29:11,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:29:11,955 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:12,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:12,905 INFO L93 Difference]: Finished difference Result 5679 states and 15263 transitions. [2021-06-12 15:29:12,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 15:29:12,905 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:29:12,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:12,910 INFO L225 Difference]: With dead ends: 5679 [2021-06-12 15:29:12,910 INFO L226 Difference]: Without dead ends: 5056 [2021-06-12 15:29:12,911 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 864.1ms TimeCoverageRelationStatistics Valid=1256, Invalid=3574, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 15:29:12,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5056 states. [2021-06-12 15:29:12,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5056 to 4138. [2021-06-12 15:29:12,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4138 states, 4137 states have (on average 2.8155668358714045) internal successors, (11648), 4137 states have internal predecessors, (11648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:12,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 11648 transitions. [2021-06-12 15:29:12,961 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 11648 transitions. Word has length 130 [2021-06-12 15:29:12,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:12,961 INFO L482 AbstractCegarLoop]: Abstraction has 4138 states and 11648 transitions. [2021-06-12 15:29:12,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:12,961 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 11648 transitions. [2021-06-12 15:29:12,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:29:12,964 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:12,964 INFO L472 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] [2021-06-12 15:29:13,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-12 15:29:13,165 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:13,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:13,165 INFO L82 PathProgramCache]: Analyzing trace with hash -321603147, now seen corresponding path program 204 times [2021-06-12 15:29:13,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:13,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261823210] [2021-06-12 15:29:13,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:13,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:13,342 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:13,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:13,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261823210] [2021-06-12 15:29:13,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261823210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:13,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389751038] [2021-06-12 15:29:13,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:13,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 15:29:13,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:13,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 15:29:13,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:13,550 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:13,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389751038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:13,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:13,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 15:29:13,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18430820] [2021-06-12 15:29:13,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 15:29:13,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:13,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 15:29:13,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:29:13,551 INFO L87 Difference]: Start difference. First operand 4138 states and 11648 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:14,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:14,265 INFO L93 Difference]: Finished difference Result 5908 states and 15981 transitions. [2021-06-12 15:29:14,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 15:29:14,265 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:29:14,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:14,271 INFO L225 Difference]: With dead ends: 5908 [2021-06-12 15:29:14,271 INFO L226 Difference]: Without dead ends: 5638 [2021-06-12 15:29:14,271 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 678.9ms TimeCoverageRelationStatistics Valid=1238, Invalid=3052, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 15:29:14,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5638 states. [2021-06-12 15:29:14,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5638 to 4318. [2021-06-12 15:29:14,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4318 states, 4317 states have (on average 2.8276580958999307) internal successors, (12207), 4317 states have internal predecessors, (12207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:14,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4318 states to 4318 states and 12207 transitions. [2021-06-12 15:29:14,320 INFO L78 Accepts]: Start accepts. Automaton has 4318 states and 12207 transitions. Word has length 130 [2021-06-12 15:29:14,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:14,321 INFO L482 AbstractCegarLoop]: Abstraction has 4318 states and 12207 transitions. [2021-06-12 15:29:14,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:14,321 INFO L276 IsEmpty]: Start isEmpty. Operand 4318 states and 12207 transitions. [2021-06-12 15:29:14,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-12 15:29:14,324 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:14,324 INFO L472 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] [2021-06-12 15:29:14,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-12 15:29:14,525 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:14,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:14,525 INFO L82 PathProgramCache]: Analyzing trace with hash -299259897, now seen corresponding path program 205 times [2021-06-12 15:29:14,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:14,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475701382] [2021-06-12 15:29:14,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:14,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:14,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:14,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475701382] [2021-06-12 15:29:14,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475701382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:14,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547609632] [2021-06-12 15:29:14,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:14,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:14,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 15:29:14,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:14,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547609632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:14,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:29:14,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-12 15:29:14,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23621901] [2021-06-12 15:29:14,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 15:29:14,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:14,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 15:29:14,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-06-12 15:29:14,906 INFO L87 Difference]: Start difference. First operand 4318 states and 12207 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:15,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:15,769 INFO L93 Difference]: Finished difference Result 5203 states and 14105 transitions. [2021-06-12 15:29:15,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 15:29:15,770 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-12 15:29:15,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:15,774 INFO L225 Difference]: With dead ends: 5203 [2021-06-12 15:29:15,774 INFO L226 Difference]: Without dead ends: 4831 [2021-06-12 15:29:15,775 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 848.9ms TimeCoverageRelationStatistics Valid=1351, Invalid=3341, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 15:29:15,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4831 states. [2021-06-12 15:29:15,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4831 to 4233. [2021-06-12 15:29:15,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4233 states, 4232 states have (on average 2.81734404536862) internal successors, (11923), 4232 states have internal predecessors, (11923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:15,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4233 states to 4233 states and 11923 transitions. [2021-06-12 15:29:15,813 INFO L78 Accepts]: Start accepts. Automaton has 4233 states and 11923 transitions. Word has length 130 [2021-06-12 15:29:15,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:15,814 INFO L482 AbstractCegarLoop]: Abstraction has 4233 states and 11923 transitions. [2021-06-12 15:29:15,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:15,814 INFO L276 IsEmpty]: Start isEmpty. Operand 4233 states and 11923 transitions. [2021-06-12 15:29:15,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:29:15,817 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:15,817 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:16,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-12 15:29:16,017 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:16,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:16,017 INFO L82 PathProgramCache]: Analyzing trace with hash 750131032, now seen corresponding path program 206 times [2021-06-12 15:29:16,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:16,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122197994] [2021-06-12 15:29:16,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:16,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:16,186 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 406 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:16,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:16,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122197994] [2021-06-12 15:29:16,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122197994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:16,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215892450] [2021-06-12 15:29:16,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:16,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:29:16,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:16,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:29:16,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 443 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:16,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215892450] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:29:16,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 15:29:16,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2021-06-12 15:29:16,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042666387] [2021-06-12 15:29:16,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:16,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:16,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:16,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:29:16,410 INFO L87 Difference]: Start difference. First operand 4233 states and 11923 transitions. Second operand has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:16,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:16,695 INFO L93 Difference]: Finished difference Result 19732 states and 54883 transitions. [2021-06-12 15:29:16,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:29:16,695 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-12 15:29:16,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:16,697 INFO L225 Difference]: With dead ends: 19732 [2021-06-12 15:29:16,697 INFO L226 Difference]: Without dead ends: 2029 [2021-06-12 15:29:16,697 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 308.2ms TimeCoverageRelationStatistics Valid=609, Invalid=1371, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 15:29:16,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-06-12 15:29:16,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 2029. [2021-06-12 15:29:16,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 2028 states have (on average 2.5631163708086784) internal successors, (5198), 2028 states have internal predecessors, (5198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:16,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 5198 transitions. [2021-06-12 15:29:16,715 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 5198 transitions. Word has length 135 [2021-06-12 15:29:16,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:16,715 INFO L482 AbstractCegarLoop]: Abstraction has 2029 states and 5198 transitions. [2021-06-12 15:29:16,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:16,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 5198 transitions. [2021-06-12 15:29:16,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-12 15:29:16,716 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:29:16,716 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 15:29:16,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-12 15:29:16,917 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:29:16,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:29:16,917 INFO L82 PathProgramCache]: Analyzing trace with hash -73289105, now seen corresponding path program 207 times [2021-06-12 15:29:16,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:29:16,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675620274] [2021-06-12 15:29:16,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:29:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:29:17,104 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 397 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:17,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:29:17,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675620274] [2021-06-12 15:29:17,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675620274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:29:17,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127258126] [2021-06-12 15:29:17,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:17,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 15:29:17,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:29:17,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 15:29:17,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:29:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 443 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:29:17,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127258126] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:29:17,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 15:29:17,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2021-06-12 15:29:17,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662083845] [2021-06-12 15:29:17,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 15:29:17,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:29:17,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 15:29:17,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:29:17,332 INFO L87 Difference]: Start difference. First operand 2029 states and 5198 transitions. Second operand has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:17,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:29:17,594 INFO L93 Difference]: Finished difference Result 8213 states and 20540 transitions. [2021-06-12 15:29:17,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 15:29:17,594 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-12 15:29:17,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:29:17,594 INFO L225 Difference]: With dead ends: 8213 [2021-06-12 15:29:17,594 INFO L226 Difference]: Without dead ends: 0 [2021-06-12 15:29:17,595 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 318.2ms TimeCoverageRelationStatistics Valid=609, Invalid=1371, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 15:29:17,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-12 15:29:17,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-12 15:29:17,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:17,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-12 15:29:17,595 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2021-06-12 15:29:17,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:29:17,595 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-12 15:29:17,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 15:29:17,595 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-12 15:29:17,595 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 15:29:17,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:29:17,809 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 15:29:17,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 03:29:17 BasicIcfg [2021-06-12 15:29:17,810 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 15:29:17,811 INFO L168 Benchmark]: Toolchain (without parser) took 209806.22 ms. Allocated memory was 201.3 MB in the beginning and 777.0 MB in the end (delta: 575.7 MB). Free memory was 163.9 MB in the beginning and 538.4 MB in the end (delta: -374.4 MB). Peak memory consumption was 201.9 MB. Max. memory is 8.0 GB. [2021-06-12 15:29:17,811 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 201.3 MB. Free memory was 182.0 MB in the beginning and 181.9 MB in the end (delta: 107.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 15:29:17,811 INFO L168 Benchmark]: CACSL2BoogieTranslator took 370.24 ms. Allocated memory is still 201.3 MB. Free memory was 163.7 MB in the beginning and 163.5 MB in the end (delta: 231.5 kB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. [2021-06-12 15:29:17,811 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.70 ms. Allocated memory is still 201.3 MB. Free memory was 163.5 MB in the beginning and 161.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-12 15:29:17,811 INFO L168 Benchmark]: Boogie Preprocessor took 13.35 ms. Allocated memory is still 201.3 MB. Free memory was 161.7 MB in the beginning and 160.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 15:29:17,811 INFO L168 Benchmark]: RCFGBuilder took 293.32 ms. Allocated memory is still 201.3 MB. Free memory was 160.2 MB in the beginning and 173.5 MB in the end (delta: -13.3 MB). Peak memory consumption was 15.0 MB. Max. memory is 8.0 GB. [2021-06-12 15:29:17,811 INFO L168 Benchmark]: TraceAbstraction took 209095.27 ms. Allocated memory was 201.3 MB in the beginning and 777.0 MB in the end (delta: 575.7 MB). Free memory was 173.0 MB in the beginning and 538.4 MB in the end (delta: -365.4 MB). Peak memory consumption was 209.7 MB. Max. memory is 8.0 GB. [2021-06-12 15:29:17,811 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 201.3 MB. Free memory was 182.0 MB in the beginning and 181.9 MB in the end (delta: 107.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 370.24 ms. Allocated memory is still 201.3 MB. Free memory was 163.7 MB in the beginning and 163.5 MB in the end (delta: 231.5 kB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 28.70 ms. Allocated memory is still 201.3 MB. Free memory was 163.5 MB in the beginning and 161.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.35 ms. Allocated memory is still 201.3 MB. Free memory was 161.7 MB in the beginning and 160.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 293.32 ms. Allocated memory is still 201.3 MB. Free memory was 160.2 MB in the beginning and 173.5 MB in the end (delta: -13.3 MB). Peak memory consumption was 15.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 209095.27 ms. Allocated memory was 201.3 MB in the beginning and 777.0 MB in the end (delta: 575.7 MB). Free memory was 173.0 MB in the beginning and 538.4 MB in the end (delta: -365.4 MB). Peak memory consumption was 209.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 209019.3ms, OverallIterations: 216, TraceHistogramMax: 11, EmptinessCheckTime: 490.6ms, AutomataDifference: 89628.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 61.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 21200 SDtfs, 163602 SDslu, 176276 SDs, 0 SdLazy, 31939 SolverSat, 25161 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17524.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29971 GetRequests, 20942 SyntacticMatches, 0 SemanticMatches, 9029 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97719 ImplicationChecksByTransitivity, 85898.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4318occurred in iteration=213, InterpolantAutomatonStates: 6728, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 7100.0ms AutomataMinimizationTime, 216 MinimizatonAttempts, 175150 StatesRemovedByMinimization, 214 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2111.7ms SsaConstructionTime, 5347.7ms SatisfiabilityAnalysisTime, 54353.1ms InterpolantComputationTime, 42018 NumberOfCodeBlocks, 42018 NumberOfCodeBlocksAsserted, 1201 NumberOfCheckSat, 41592 ConstructedInterpolants, 0 QuantifiedInterpolants, 172074 SizeOfPredicates, 3134 NumberOfNonLiveVariables, 43512 ConjunctsInSsa, 4179 ConjunctsInUnsatCore, 426 InterpolantComputations, 8 PerfectInterpolantSequences, 1690/83616 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...